Import backup from 2004-07-10

.bochsrc

@@ -0,0 +1,43 @@
+# configuration file generated by Bochs
+config_interface: textconfig
+display_library: x
+megs: 32
+romimage: file=/usr/share/bochs/BIOS-bochs-latest, address=0xf0000
+vgaromimage: /usr/share/bochs/VGABIOS-lgpl-latest
+boot: floppy
+floppya: 1_44="hos.flp", status=inserted
+# no floppyb
+ata0: enabled=1, ioaddr1=0x1f0, ioaddr2=0x3f0, irq=14
+ata1: enabled=0
+ata2: enabled=0
+ata3: enabled=0
+parport1: enabled=1, file=""
+com1: enabled=1, dev=""
+usb1: enabled=1, ioaddr=0xff80, irq=10
+# no sb16
+floppy_bootsig_check: disabled=0
+vga_update_interval: 30000
+keyboard_serial_delay: 20000
+keyboard_paste_delay: 100000
+floppy_command_delay: 50000
+ips: 500000
+text_snapshot_check: 0
+mouse: enabled=0
+private_colormap: enabled=0
+i440fxsupport: enabled=0
+clock: sync=none, time0=local
+# no ne2k
+newharddrivesupport: enabled=1
+# no loader
+log: -
+logprefix: %t%e%d
+debugger_log: -
+panic: action=ask
+error: action=report
+info: action=report
+debug: action=ignore
+pass: action=fatal
+keyboard_mapping: enabled=0, map=
+keyboard_type: mf
+user_shortcut: keys=none
+# no cmosimage

Functions.c

@@ -1,94 +0,0 @@
-//Functions.c
-//05/07/03 Josh Holtrop
-//for HOS
-
-
-inline void outportb(unsigned int port, unsigned char value)		// Output a byte to a port
-{
-    asm volatile ("outb %%al,%%dx"::"d" (port), "a" (value));
-};
-
-inline void outportw(unsigned int port, unsigned int value)		// Output a word to a port
-{
-    asm volatile ("outw %%ax,%%dx"::"d" (port), "a" (value));
-};
-
-inline byte inportb(unsigned short port)
-{
-	unsigned char ret_val;
-
-	asm volatile("inb %w1,%b0"
-		: "=a"(ret_val)
-		: "d"(port));
-	return ret_val;
-};
-
-void enable_ints()
-{
-	asm("sti");
-};
-
-void disable_ints()
-{
-	asm("cli");
-};
-
-void remap_pics(int pic1, int pic2)
-{
-	byte	a1, a2;
-
-	a1 = inportb(PIC1_DATA);      //0x21
-	a2 = inportb(PIC2_DATA);      //0xA1
-
-	outportb(PIC1_COMMAND, ICW1_INIT+ICW1_ICW4);	//0x20, 0x10+0x01 00010001b
-	outportb(PIC2_COMMAND, ICW1_INIT+ICW1_ICW4);	//0xA0, 0x10+0x01 00010001b
-	outportb(PIC1_DATA, pic1);			//0x21, pic1
-	outportb(PIC2_DATA, pic2);			//0xA1, pic2
-	outportb(PIC1_DATA, 4);				//0x21, 0x04      00000100b
-	outportb(PIC2_DATA, 2);				//0xA1, 0x02      00000010b
-	outportb(PIC1_DATA, ICW4_8086);			//0x21, 0x01      00000001b
-	outportb(PIC2_DATA, ICW4_8086);			//0xA1, 0x01      00000001b
-
-	outportb(PIC1_DATA, a1);			//0x21
-	outportb(PIC2_DATA, a2);			//0xA1
-}
-
-inline void pic1_mask(byte mask)
-{
-	outportb(PIC1_DATA, mask);			//0x21, maskfield *OCW1*
-}
-
-inline void pic2_mask(byte mask)
-{
- 	outportb(PIC2_DATA, mask);			//0xA1, maskfield *OCW1*
-}
-
-inline void restart()
-{
-	outportb (0x64, 0xfe);
-	for (;;)
-	{
-	}
-}
-
-inline void eoi()
-{
-	outportb(0x20, 0x20);							//EOI
-}
-
-inline void eoi2()
-{
- 	outportb(0xA0, 0x20);
- 	outportb(0x20, 0x20);
-}
-
-
-
-
-
-
-
-
-
-
-

Makefile

@@ -0,0 +1,48 @@
+# Makefile for HOS
+# Josh Holtrop
+# Created: 07/09/04
+
+FLOPPY=/dev/fd0
+FLOPPY_MOUNT=./mnt_flp
+FLOPPY_IMAGE=hos.flp
+GRUB_IMAGE=grub.flp
+
+all:
+	make -C kernel
+#	make -C rmmod
+
+clean:
+	make -C kernel clean
+	make -C include clean
+#	make -C rmmod clean
+	- rm *~ hos.flp
+
+
+grub:
+	- mkdir $(FLOPPY_MOUNT)
+	mke2fs $(FLOPPY)
+	mount -t ext2 $(FLOPPY) $(FLOPPY_MOUNT)
+	grub-install --root-directory=$(FLOPPY_MOUNT) fd0
+	umount $(FLOPPY_MOUNT)
+	- rmdir $(FLOPPY_MOUNT)
+
+grub_image:
+	dd if=$(FLOPPY) of=$(GRUB_IMAGE)
+
+install:
+	- mkdir $(FLOPPY_MOUNT)
+	mount -t ext2 $(FLOPPY) $(FLOPPY_MOUNT)
+	cp kernel/kernel.bin  $(FLOPPY_MOUNT)
+	cp menu.lst $(FLOPPY_MOUNT)/boot/grub
+	umount $(FLOPPY_MOUNT)
+	- rmdir $(FLOPPY_MOUNT)
+
+install_img:
+	- mkdir $(FLOPPY_MOUNT)
+	cp grub.flp $(FLOPPY_IMAGE)
+	mount -t ext2 -o loop $(FLOPPY_IMAGE) $(FLOPPY_MOUNT)
+	cp kernel/kernel.bin $(FLOPPY_MOUNT)
+	cp menu.lst $(FLOPPY_MOUNT)/boot/grub
+	umount $(FLOPPY_MOUNT)
+	- rmdir $(FLOPPY_MOUNT)
+

bootdef.inc

@@ -1,26 +0,0 @@
-
-%define VERSION		"0.1.2"			;HOS version
-
-%define BOOT_FAT_SEG	0x07E0			;right after boot sector
-%define BOOT_ROOT_SEG	0x0900			;right after FAT
-%define BOOT_KERNEL_SEG	0x0AC0			;right after ROOT_DIR
-%define BOOT_STAGE2_SEG	0x0B00			;right after KERNEL_SEG
-%define BOOT_STAGE2_ADD	0xB000			;address of stage2 to jump to, org at
-%define BOOT_KERNEL_ADD	0x100000		;final pmode kernel destination - physical
-%define BOOT_RD_ADD	0x200000		;2mb for ram disk
-
-%define BOOT_DATA_SEG	0x9000			;data gathered by stage2 loader goes here
-
-%define BOOT_HASRD	0x0000		;1
-%define BOOT_VESA	0x0002		;2 - 0 for console, otherwise VESA mode
-%define BOOT_VESA_OEM	0x0004		;258 - null-terminated OEM identification string
-%define BOOT_VESA_VBE	0x0106		;512 - copy of VESA VBEInfoBlock
-%define	BOOT_VESA_INFO	0x0306		;256 - copy of VESA ModeInfoBlock for selected mode
-%define BOOT_MEMENTRIES	0x040A		;4 - dword = number of memmap entries
-%define BOOT_MEMMAP	0x2000		;? -  memory map information
-
-
-
-%define BOOT_DRIVE	0x7C24		;1 - boot drive
-
-

functions.h

@@ -1,24 +0,0 @@
-//functions.h
-//05/07/03 Josh Holtrop
-//for HOS
-
-
-
-inline void outportb(unsigned int port, unsigned char value);
-inline void outportw(unsigned int port, unsigned int value);
-inline byte inportb(unsigned short port);
-void enable_ints();
-void disable_ints();
-inline void restart();
-void remap_pics(int pic1, int pic2);
-inline void pic1_mask(byte mask);
-inline void pic2_mask(byte mask);
-inline void eoi();
-inline void eoi2();
-
-
-
-
-
-
-

include/Makefile

@@ -0,0 +1,2 @@
+clean:
+	- rm *~

include/kernel.h

@@ -0,0 +1,23 @@
+
+#ifndef __HOS_KERNEL_H__
+#define __HOS_KERNEL_H__ __HOS_KERNEL_H__
+
+#include "multiboot.h"
+
+#define VIRT_OFFSET 0xC0000000
+#define MAX_MODULES 16
+#define MAX_MMAP 16
+
+typedef unsigned int u32_t;
+typedef unsigned short u16_t;
+typedef unsigned char u8_t;
+
+/* returns true to callee if we should jump to a real mode module */
+int k_mbsave(mb_info_t *mbinfo, unsigned int mb_magic);
+
+void k_init();
+
+void isr();
+
+#endif
+

include/module.h

@@ -0,0 +1,16 @@
+
+#ifndef __HOS_MODULE_H__
+#define __HOS_MODULE_H__ __HOS_MODULE_H__
+
+#define MOD_REAL_MODE 1
+#define MOD_KERNEL 2
+
+typedef struct {
+	unsigned int mod_magic;		// "HOSM" = 0x484F534D
+	unsigned int mod_type;		// module type
+	void (*init) ();		// address of void initialization function
+	unsigned int reserved;
+} hos_module_header_t;
+
+#endif
+

include/multiboot.h

@@ -0,0 +1,144 @@
+
+#ifndef __HOS_MULTIBOOT_H__
+#define __HOS_MULTIBOOT_H__ __HOS_MULTIBOOT_H__
+
+/* The magic number for the Multiboot header. */
+#define MULTIBOOT_HEADER_MAGIC          0x1BADB002
+
+#define MB_HEADER_ALIGN_MODULES 0x01
+#define MB_HEADER_MEM_INFO 0x02
+#define MB_HEADER_VIDEO_INFO 0x04
+#define MB_HEADER_KLUDGE_OFFSETS 0x10000
+
+
+/* The magic number passed by a Multiboot-compliant boot loader. */
+#define MULTIBOOT_BOOTLOADER_MAGIC      0x2BADB002
+
+#define MB_BOOTLOADER_MEM_INFO 0x01
+#define MB_BOOTLOADER_BOOT_DEVICE 0x02
+#define MB_BOOTLOADER_COMMAND_LINE 0x04
+#define MB_BOOTLOADER_MODS 0x08
+#define MB_BOOTLOADER_AOUT 0x10
+#define MB_BOOTLOADER_ELF 0x20
+#define MB_BOOTLOADER_MMAP 0x40
+#define MB_BOOTLOADER_DRIVES 0x80
+#define MB_BOOTLOADER_CONFIG 0x0100
+#define MB_BOOTLOADER_APM 0x0200
+#define MB_BOOTLOADER_GRAPHICS 0x0400
+
+
+#define MB_DRIVE_MODE_CHS 0
+#define MB_DRIVE_MODE_LBA 1
+
+
+/* The Multiboot header. */
+typedef struct
+{
+	unsigned int magic;
+	unsigned int flags;
+	unsigned int checksum;
+	unsigned int header_addr;
+	unsigned int load_addr;
+	unsigned int load_end_addr;
+	unsigned int bss_end_addr;
+	unsigned int entry_addr;
+} mb_header_t;
+
+/* The symbol table for a.out. */
+typedef struct
+{
+	unsigned int tabsize;
+	unsigned int strsize;
+	unsigned int addr;
+	unsigned int reserved;
+} mb_aout_symbol_table_t;
+
+/* The section header table for ELF. */
+typedef struct
+{
+	unsigned int num;
+	unsigned int size;
+	unsigned int addr;
+	unsigned int shndx;
+} mb_elf_section_header_table_t;
+
+/* The Multiboot information. */
+typedef struct
+{
+	unsigned int flags;
+	unsigned int mem_lower;		// present if flags[0] is set
+	unsigned int mem_upper;
+	unsigned int boot_device;	// 1
+	unsigned int cmdline;		// 2
+	unsigned int mods_count;	// 3
+	unsigned int mods_addr;
+	union
+	{
+		mb_aout_symbol_table_t aout_sym;	// 4
+		mb_elf_section_header_table_t elf_sec;	// 5
+	};
+	unsigned int mmap_length;	// 6
+	unsigned int mmap_addr;
+	unsigned int drives_length;	// 7
+	unsigned int drives_addr;
+	unsigned int config_table;	// 8
+	unsigned int bootloader_name;	// 9
+	unsigned int apm_table;		// 10
+
+	unsigned int vbe_control_info;	// 11
+	unsigned int vbe_mode_info;
+	unsigned short vbe_mode;
+	unsigned short vbe_interface_seg;
+	unsigned short vbe_interface_off;
+	unsigned short vbe_interface_len;
+} mb_info_t;
+
+/* The module structure. */
+typedef struct
+{
+	unsigned int mod_start;
+	unsigned int mod_end;
+	unsigned int string;
+	unsigned int reserved;
+} mb_module_t;
+
+/* The memory map. Be careful that the offset 0 is base_addr_low, not size. */
+typedef struct
+{
+	unsigned int size;		//offset -4
+	unsigned int base_addr_low;	//offset 0
+	unsigned int base_addr_high;
+	unsigned int length_low;
+	unsigned int length_high;
+	unsigned int type;
+} mb_mmap_t;
+
+/* The drive structure */
+typedef struct
+{
+	unsigned int size;
+	unsigned char drive_number;
+	unsigned char drive_mode;
+	unsigned char drive_cylinders;
+	unsigned char drive_heads;
+	unsigned char drive_sectors;
+	unsigned short drive_ports[1];
+} mb_drive_t;
+
+/* APM table structure */
+typedef struct
+{
+	unsigned short version;
+	unsigned short cseg;
+	unsigned int offset;
+	unsigned short cseg_16;
+	unsigned short dseg;
+	unsigned short flags;
+	unsigned short cseg_len;
+	unsigned short cseg_16_len;
+	unsigned short dseg_len;
+} mb_apm_t;
+
+
+#endif
+

k_defines.h

@@ -1,47 +0,0 @@
-//k_defines.h
-//03/17/03 Josh Holtrop
-
-#define	PIC1		0x20
-#define	PIC2		0xA0
-#define	PIC1_COMMAND	PIC1
-#define	PIC1_DATA	(PIC1+1)
-#define	PIC2_COMMAND	PIC2
-#define	PIC2_DATA	(PIC2+1)
-#define	PIC_EOI		0x20
-
-#define	ICW1_ICW4	0x01		/* ICW4 (not) needed */
-#define	ICW1_SINGLE	0x02		/* Single (cascade) mode */
-#define	ICW1_INTERVAL4	0x04		/* Call address interval 4 (8) */
-#define	ICW1_LEVEL	0x08		/* Level triggered (edge) mode */
-#define	ICW1_INIT	0x10		/* Initialization - required! */
-
-#define	ICW4_8086	0x01		/* 8086/88 (MCS-80/85) mode */
-#define	ICW4_AUTO	0x02		/* Auto (normal) EOI */
-#define	ICW4_BUF_SLAVE	0x08		/* Buffered mode/slave */
-#define	ICW4_BUF_MASTER	0x0C		/* Buffered mode/master */
-#define	ICW4_SFNM	0x10		/* Special fully nested (not) */
-
-#define BLUE_TXT	0x01
-#define RED_TXT		0x04
-#define WHITE_TXT	0x07
-#define CYAN_TXT	0x0B
-#define YELLOW_TXT	0x0E
-#define BRWHITE_TXT	0x0F
-
-#define FREERAM_START	0x268000
-
-#define KERNEL_PID	0x02
-
-typedef	unsigned char	byte;
-typedef	unsigned short	word;
-typedef	unsigned int	dword;
-
-typedef struct {
-	dword	lowdword;
-	dword	highdword;
-} __attribute__((packed)) qword;
-
-
-
-
-

kernel.asm

@@ -1,62 +0,0 @@
-
-%include "bootdef.inc"
-
-%define GDT	0x140000
-%define IDT	0x150000
-
-[global start]
-[extern _isr]
-[extern _k_init]
-
-bits 32
-
-start:
-	cli				;if they weren't already off
-	mov	edi, GDT
-	mov	esi, gdt
-	mov	ecx, gdt_end-gdt
-copy_gdt:
-	lodsb
-	stosb
-	loop	copy_gdt
-
-	mov	edi, IDT		;destination
-	mov	esi, isr_0		;address of isr0
-	mov	edx, isr_1-isr_0	;distance between isr labels
-	mov	ecx, 50			;number of isrlabels
-fill_idt:
-	mov	ebx, esi
-	mov	ax, si
-	stosw				;0 offset 15:0
-	mov	ax, KERNEL_CODE
-	stosw				;2 selector 15:0
-	mov	ax, 0x8E00
-	stosw				;4 [P][DPL][0][TYPE][0][0][0][0][0][0][0][0]
-	shr	esi, 16
-	mov	ax, si
-	stosw				;6 offset 31:16
-	mov	esi, ebx
-	add	esi, edx
-	loop	fill_idt
-
-	lgdt	[gdtr]			;load gdt
-	jmp	KERNEL_CODE:newgdtcontinue
-newgdtcontinue:
-	mov	ax, KERNEL_DATA
-	mov	es, ax
-	mov	ds, ax
-	mov	gs, ax
-	mov	fs, ax
-	mov	ss, ax
-	mov	esp, 0x1ffffc		;stack just under 2mb, moves downward
-	lidt	[idtr]			;load idt
-
-	call	_k_init
-	hlt				;halt processor when k_init is done
-	jmp	$			;shouldn't get here...	
-
-%include "gdt.inc"
-%include "idt.inc"
-
-
-

kernel.c

@@ -1,109 +0,0 @@
-//kernel.c
-//08/13/03 Josh Holtrop
-//Holtrop's Operating System
-
-#define VXR video_mode.XResolution
-#define VYR video_mode.YResolution
-
-#include "k_defines.h"
-
-#include "lib/string.h"
-#include "lib/io.h"
-
-#include "functions.h"
-#include "video.h"
-#include "mm.h"
-#include "keyboard.h"
-#include "mouse.h"
-
-void isr(dword num);
-void k_init();
-
-#include "mouse.c"
-#include "keyboard.c"
-#include "mm.c"
-#include "functions.c"
-#include "video.c"
-
-dword	timer = 0;
-
-void k_init()
-{
-	console_cls();
-	remap_pics(0x20, 0x28);
-	//set timer : 2e9c = 100hz
-	outportb(0x43, 0x34);
-	outportb(0x40, 0x9c); //lsb
-	outportb(0x40, 0x2e); //msb
-	video_init((ModeInfoBlock *) 0x90306);
-	video_rectf(VXR*3/11, 0, VXR*4/11, VYR-1, 0x00000088);      		//test rectangles, draws "HOS"
-	video_rectf(VXR*7/11, 0, VXR*8/11, VYR-1, 0x00000088);
-	video_rectf(VXR/11, 0, VXR*2/11, VYR*2/5, 0x00000088);
-	video_rectf(VXR/11, VYR*3/5, VXR*2/11, VYR-1, 0x00000088);
-	video_rectf(VXR*5/11, VYR/5, VXR*6/11, VYR*4/5, 0x00000088);
-	video_rectf(VXR*9/11, VYR/5, VXR-1, VYR*2/5, 0x00000088);
-	video_rectf(VXR*8/11, VYR*3/5, VXR*10/11, VYR*4/5, 0x00000088);
-
-	video_vert(10, 10, 16, 0x00ffff00);		//should be yellow 'H'
-	video_horiz(13, 10, 14, 0x00ffff00);
-	video_vert(14, 10, 16, 0x00ffff00);
-	
-	video_horiz(10, 17, 21, 0x00ffff00);
-	video_vert(19, 10, 16, 0x00ffff00);
-	video_horiz(16, 17, 21, 0x00ffff00);
-	
-	int a, b;
-	for (a = 0; a < 256; a++)
-	{
-		for (b = 0; b < 256; b++)
-		{
-			video_pset(a+5, b+30, (a<<16)|(b<<8));
-			video_pset(a+270, b+30, (a<<8)|(b));
-			video_pset(a+535, b+30, (a<<16)|(b));
-
-			video_pset(a+5, b+290, (a<<16)|(b<<8)|0x000000ff);
-			video_pset(a+270, b+290, (a<<8)|(b)|0x00ff0000);
-			video_pset(a+535, b+290, (a<<16)|(b)|0x0000ff00);
-		}
-	}
-
-	mm_init();
-	mouse_init();
-	enable_ints();
-	printf("Memory available to OS: %d MB (Bytes: %d)\n", mm_totalmem/0x100000, mm_totalmem);
-	pic1_mask(0);			//unmask IRQ's 0-7
-	pic2_mask(0);			//unmask IRQ's 8-15
-	dword key = 0;
-	for (;;)
-	{
-		key = kbdWaitKey();
-		putc(key);
-	}
-}
-
-void isr(dword num)
-{
-	switch(num)
-	{
-	case 0x20:         		// IRQ0 - timer interrupt
-		timer++;
-		(*(byte *)0xb8000)++;
-		eoi();
-		break;
-	case 0x21:  			// IRQ1 - keyboard interrupt
-		isr_keyboard();    	//isr_keybard() takes care of calling eoi()
-		break;
-	case 0x2C:			// IRQ12 - PS/2 mouse
-		isr_mouse();
-		eoi2();
-		break;
-	default:
-		printf("Interrupt %d (0x%x) Unhandled!!\n", num, num);
-		break;
-	}
-}
-
-
-
-
-

kernel/Makefile

@@ -0,0 +1,33 @@
+# Makefile for HOS
+# Josh Holtrop
+# Created: 07/08/04
+# Modified: 07/09/04
+
+# Assembler Information:
+NASM=nasm
+NASM_FLAGS=-f aout
+
+# C Information:
+CC=gcc
+CC_FLAGS=-fleading-underscore -fno-builtin -nostdlib -nostartfiles -nodefaultlibs -I. -I../include -Wall
+
+# Linker Information:
+LD=ld
+LD_FLAGS=-nodefaultlibs -nostdlib --no-demangle -T link.ld
+
+all: Asm_Kernel C_Kernel
+	$(LD) $(LD_FLAGS) -Map boot.map boot.o kernel.o -o kernel.bin
+
+Asm_Kernel:
+	$(NASM) $(NASM_FLAGS) -l boot.lst boot.asm -o boot.o
+
+C_Kernel:
+	$(CC) $(CC_FLAGS) -c kernel.c -o kernel.o
+
+#################################################
+# Clean up the source directory of any binaries #
+#################################################
+clean:
+	- rm *.s *.S *.o *.bin *~ *.map *.lst
+
+

kernel/boot.asm

@@ -0,0 +1,196 @@
+;boot.asm
+;Author: Josh Holtrop
+;Date: 07/08/04
+;Modified: 07/10/04
+
+
+%define	MULTIBOOT_MAGIC	0x1BADB002
+%define	MULTIBOOT_FLAGS	0x00010003
+
+%define VIRT_OFFSET	0xC0000000	;3gb virtual address
+%define PHYS_START	0x00100000	;1mb physical address
+%define VIRT_STACK_TOP	0xCFFFFFFC	;3gb+256mb virtual address
+%define GDT_P	PHYS_START		;1mb physical - Global Descriptor Table space
+%define GDT_V	GDT_P+VIRT_OFFSET
+%define IDT_P	PHYS_START+0x2000	;1mb+8kb - Interrupt Descriptor Table space
+%define IDT_V	IDT_P+VIRT_OFFSET
+%define PDBR_P	PHYS_START+0x4000	;1mb+16kb - Page Directory Base Register (first PD)
+%define PDBR_V	PDBR_P+VIRT_OFFSET
+%define LOPT_P	PHYS_START+0x5000	;1mb+20kb - LOw Page Table for mapping first 4mb
+%define LOPT_V	LOPT_P+VIRT_OFFSET
+%define PT_STACK_P PHYS_START+0x6000	;1mb+24kb - page table for initial kernel stack pages (under 0xD0000000)
+%define PT_STACK_V PT_STACK_P+VIRT_OFFSET
+%define STACK_P	PHYS_START+0x7000	;1mb+28kb - initial 4kb kernel stack page
+%define STACK_V	STACK_P+VIRT_OFFSET
+%define KERNEL_P PHYS_START+0x8000	;1mb+32kb - the kernel's physical address
+%define KERNEL_V KERNEL_P+VIRT_OFFSET	;3gb+1mb+32kb, the virtual address of the kernel
+
+extern _k_init, _isr, _k_mbsave, _end
+
+[bits 32]
+
+[global _start]
+_start:
+
+multiboot_header:
+	dd	MULTIBOOT_MAGIC					;magic
+	dd	MULTIBOOT_FLAGS					;flags
+	dd	-(MULTIBOOT_MAGIC + MULTIBOOT_FLAGS)		;checksum
+
+	dd	multiboot_header-VIRT_OFFSET			;header_addr
+	dd	_start-VIRT_OFFSET				;load_addr
+	dd	0						;load_end_addr
+	dd	_end-VIRT_OFFSET				;bss_end_addr
+	dd	multiboot_entry-VIRT_OFFSET			;entry_addr
+
+;	dd	1						;mode_type
+;	dd	80						;width
+;	dd	25						;height
+;	dd	0						;depth
+
+[global multiboot_entry]
+multiboot_entry:
+;This is where the kernel begins execution from the bootloader.
+;At this point, a temporary gdt is set up to "map" 0xC000_0000 to 0x0.
+	cli					;should already be off...
+	lgdt	[gdtrbs32-VIRT_OFFSET]
+	jmp	KERNEL_CODE_BS32:segmented_start
+segmented_start:
+	mov	ax, KERNEL_DATA_BS32
+	mov	ss, ax
+	mov	ds, ax
+	mov	es, ax
+	mov	gs, ax
+	mov	fs, ax
+	mov	esp, STACK_V+0x1000		;ok, now we can access our data
+
+;aloop:
+;	inc dword [0xC00B8000]
+;	jmp	aloop
+
+
+;Then the multiboot info structures are saved to local data variables.
+	add	ebx, VIRT_OFFSET
+	push	eax
+	push	ebx				;pointer to multiboot info structure
+	call	_k_mbsave			;save multiboot info structures
+	add	esp, 8
+
+	cmp	eax, 0
+	jz	pm_return
+
+;go back to real mode to initialize video mode
+	mov	ebx, pm_return
+
+
+
+;Next we enable paging with the first 4mb mapped 1:1 virtual:physical
+; and with the 4mb starting at 0xC000_0000 mapped to the first 4mb physical.
+pm_return:
+	xor	eax, eax
+	mov	edi, PDBR_V
+	mov	ecx, 1024			;clear the PDBR
+	rep stosd
+	mov	edi, PT_STACK_V
+	mov	ecx, 1024			;clear the PT_STACK
+	rep stosd
+	mov	[PDBR_V], dword LOPT_P|0x03		;store the physical address of the LOw Page Table | (read/write, present)
+	mov	[PDBR_V+0xC00], dword LOPT_P|0x03	;store the physical address of the LOw Page Table | (read/write, present)
+	mov	[PDBR_V+0xCFC], dword PT_STACK_P|0x03	;store the physical address of the initial stack page page table | (read/write, present)
+	mov	[PT_STACK_V+0xFFC], dword STACK_P|0x03	;store the physical address of the initial stack page | (read/write, present)
+
+	mov	edi, LOPT_V
+	mov	ecx, 1024
+	mov	eax, 0x03			;starting physical address = 0x0 | (read/write, present flags)
+fill_lopt_loop:					;fill the page table
+	stosd
+	add	eax, 4096			;increment next phsyical address by 4kb
+	loop	fill_lopt_loop
+
+	mov	eax, PDBR_P
+	mov	cr3, eax			;store the Page Directory Base Address
+	mov	eax, cr0
+	or	eax, 0x80000000			;set Page Enable bit
+	mov	cr0, eax			;now paging is active!
+
+
+	mov	edi, GDT_V
+	mov	esi, gdt
+	mov	ecx, gdt_end-gdt
+	rep movsb
+
+	mov	edi, IDT_V		;destination
+	mov	esi, isr_0		;address of isr0
+	mov	edx, isr_1-isr_0	;distance between isr labels
+	mov	ecx, 50			;number of isrlabels
+fill_idt:
+	mov	ebx, esi
+	mov	ax, si
+	stosw				;0 offset 15:0
+	mov	ax, KERNEL_CODE
+	stosw				;2 selector 15:0
+	mov	ax, 0x8E00
+	stosw				;4 [P][DPL][0][TYPE][0][0][0][0][0][0][0][0]
+	shr	esi, 16
+	mov	ax, si
+	stosw				;6 offset 31:16
+	mov	esi, ebx
+	add	esi, edx
+	loop	fill_idt
+	mov	word	[IDT_V+0x30*8+4], 0xEE00	;interrupt 0x30 has user priviledges
+
+;Then we can start using our "real" gdt, then unmap the lower 4mb.
+	lgdt	[gdtr]			;load gdt
+	jmp	KERNEL_CODE:newgdtcontinue
+newgdtcontinue:
+	mov	ax, KERNEL_DATA
+	mov	es, ax
+	mov	ds, ax
+	mov	gs, ax
+	mov	fs, ax
+	mov	ss, ax
+	mov	esp, VIRT_STACK_TOP		;stack just under 3gb+256mb, moves downward
+	lidt	[idtr]				;load idt
+	mov	[PDBR_V], dword 0		;unmap 0x0, we are running completely paged at 0xC000_0000
+
+	call	_k_init			;C kernel initialization
+
+idle_loop:
+;	sti
+	hlt
+	jmp	idle_loop
+
+;-------------------------------------------------------
+gdtrbs32:
+	dw	gdt_endbs32-gdtbs32-1
+	dd	gdtbs32-VIRT_OFFSET
+gdtbs32:				;null descriptor
+	dd	0
+	dd	0
+
+	;a base of 0x4000_0000, when added to 0xC000_0000 will produce 0x0000_0000 physical before paging in effect
+KERNEL_CODE_BS32 equ $-gdtbs32
+	db	0xff		;limit	7:0
+	db	0xff		;limit	15:8
+	db	0x00		;base	7:0
+	db	0x00		;base	15:8
+	db	0x00		;base	23:16
+	db	0x9a		;access
+	db	0xcf		;flags / limit 19:16
+	db	0x40		;base	31:24
+
+KERNEL_DATA_BS32 equ $-gdtbs32
+	db	0xff		;limit	7:0
+	db	0xff		;limit	15:8
+	db	0x00		;base	7:0
+	db	0x00		;base	15:8
+	db	0x00		;base	23:16
+	db	0x92		;access
+	db	0xcf		;flags / limit 19:16
+	db	0x40		;base	31:24
+
+gdt_endbs32:
+
+%include "gdt.inc"
+%include "idt.inc"
+

kernel/gdt.inc

@@ -1,68 +1,71 @@
-
-
-gdtr:
-	dw	gdt_end-gdt-1
-	dd	GDT
-gdt:
-	dd	0
-	dd	0
-KERNEL_CODE equ $-gdt
-	dw	0xffff	;limit 15:0
-	dw	0x0000	;base  15:0
-	db	0x00	;base  23:16
-	db	0x9A	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
-	db	0xCF	;flags ([G][D/B][0][0]) / limit 19:16
-	db	0x00	;base  31:24
-KERNEL_DATA equ $-gdt
-	dw	0xffff	;limit 15:0
-	dw	0x0000	;base  15:0
-	db	0x00	;base  23:16
-	db	0x92	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
-	db	0xCF	;flags ([G][D/B][0][0]) / limit 19:16
-	db	0x00	;base  31:24
-VESA_CODE equ $-gdt
-	dw	0xffff	;limit 15:0
-	dw	0x0000	;base  15:0
-	db	0x00	;base  23:16
-	db	0x9A	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
-	db	0x40	;flags ([G][D/B][0][0]) / limit 19:16
-	db	0x00	;base  31:24
-VESA_DATA equ $-gdt
-	dw	0xffff	;limit 15:0
-	dw	0x0000	;base  15:0
-	db	0x00	;base  23:16
-	db	0x92	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
-	db	0x40	;flags ([G][D/B][0][0]) / limit 19:16
-	db	0x00	;base  31:24
-VIDEO_TEXT equ $-gdt
-	dw	0x7FFF	;limit 15:0
-	dw	0x8000	;base  15:0
-	db	0x0B	;base  23:16
-	db	0x92	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
-	db	0x40	;flags ([G][D/B][0][0]) / limit 19:16
-	db	0x00	;base  31:24
-VIDEO_GRAPHICS equ $-gdt
-	dw	0xFFFF	;limit 15:0
-	dw	0x0000	;base  15:0
-	db	0x0A	;base  23:16
-	db	0x92	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
-	db	0x40	;flags ([G][D/B][0][0]) / limit 19:16
-	db	0x00	;base  31:24
-USER_CODE equ $-gdt
-	dw	0xffff	;limit 15:0
-	dw	0x0000	;base  15:0
-	db	0x00	;base  23:16
-	db	0xFA	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
-	db	0xCF	;flags ([G][D/B][0][0]) / limit 19:16
-	db	0x00	;base  31:24
-USER_DATA equ $-gdt
-	dw	0xffff	;limit 15:0
-	dw	0x0000	;base  15:0
-	db	0x00	;base  23:16
-	db	0xF2	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
-	db	0xCF	;flags ([G][D/B][0][0]) / limit 19:16
-	db	0x00	;base  31:24
-gdt_end:
-
-
-
+;gdt.inc
+;Author: Josh Holtrop
+;Date: 10/30/03
+;Modified: 03/02/04
+
+gdtr:
+	dw	gdt_end-gdt-1
+	dd	GDT_V
+gdt:
+	dd	0
+	dd	0
+KERNEL_CODE equ $-gdt
+	dw	0xffff	;limit 15:0
+	dw	0x0000	;base  15:0
+	db	0x00	;base  23:16
+	db	0x9A	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
+	db	0xCF	;flags ([G][D/B][0][0]) / limit 19:16
+	db	0x00	;base  31:24
+KERNEL_DATA equ $-gdt
+	dw	0xffff	;limit 15:0
+	dw	0x0000	;base  15:0
+	db	0x00	;base  23:16
+	db	0x92	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
+	db	0xCF	;flags ([G][D/B][0][0]) / limit 19:16
+	db	0x00	;base  31:24
+USER_CODE equ $-gdt
+	dw	0xffff	;limit 15:0
+	dw	0x0000	;base  15:0
+	db	0x00	;base  23:16
+	db	0xFA	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
+	db	0xCF	;flags ([G][D/B][0][0]) / limit 19:16
+	db	0x00	;base  31:24
+USER_DATA equ $-gdt
+	dw	0xffff	;limit 15:0
+	dw	0x0000	;base  15:0
+	db	0x00	;base  23:16
+	db	0xF2	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
+	db	0xCF	;flags ([G][D/B][0][0]) / limit 19:16
+	db	0x00	;base  31:24
+VESA_CODE equ $-gdt
+	dw	0xffff	;limit 15:0
+	dw	0x0000	;base  15:0
+	db	0x00	;base  23:16
+	db	0x9A	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
+	db	0x40	;flags ([G][D/B][0][0]) / limit 19:16
+	db	0x00	;base  31:24
+VESA_DATA equ $-gdt
+	dw	0xffff	;limit 15:0
+	dw	0x0000	;base  15:0
+	db	0x00	;base  23:16
+	db	0x92	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
+	db	0x40	;flags ([G][D/B][0][0]) / limit 19:16
+	db	0x00	;base  31:24
+VIDEO_TEXT equ $-gdt
+	dw	0x7FFF	;limit 15:0
+	dw	0x8000	;base  15:0
+	db	0x0B	;base  23:16
+	db	0x92	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
+	db	0x40	;flags ([G][D/B][0][0]) / limit 19:16
+	db	0x00	;base  31:24
+VIDEO_GRAPHICS equ $-gdt
+	dw	0xFFFF	;limit 15:0
+	dw	0x0000	;base  15:0
+	db	0x0A	;base  23:16
+	db	0x92	;access ([P][DPL][1][Executable][Direction/Conforming][Writable/Readable][A])
+	db	0x40	;flags ([G][D/B][0][0]) / limit 19:16
+	db	0x00	;base  31:24
+gdt_end:
+
+
+

kernel/idt.inc

@@ -1,86 +1,92 @@
-
-idtr:
-	dw	50*8-1		;size of idt
-	dd	IDT		;address of idt
-
-
-%macro isr_label 1
-isr_%1:
-	mov	eax, %1
-	jmp	isr_main
-%endmacro
-
-isr_label	0
-isr_label	1
-isr_label	2
-isr_label	3
-isr_label	4
-isr_label	5
-isr_label	6
-isr_label	7
-isr_label	8
-isr_label	9
-isr_label	10
-isr_label	11
-isr_label	12
-isr_label	13
-isr_label	14
-isr_label	15
-isr_label	16
-isr_label	17
-isr_label	18
-isr_label	19
-isr_label	20
-isr_label	21
-isr_label	22
-isr_label	23
-isr_label	24
-isr_label	25
-isr_label	26
-isr_label	27
-isr_label	28
-isr_label	29
-isr_label	30
-isr_label	31
-isr_label	32
-isr_label	33
-isr_label	34
-isr_label	35
-isr_label	36
-isr_label	37
-isr_label	38
-isr_label	39
-isr_label	40
-isr_label	41
-isr_label	42
-isr_label	43
-isr_label	44
-isr_label	45
-isr_label	46
-isr_label	47
-isr_label	48
-isr_label	49
-
-isr_main:
-	pusha
-	push	ds
-	push	es
-
-	push	eax
-
-	call	_isr
-
-	pop	eax
-
-	pop	es
-	pop	ds
-	popa
-
-	iret
-
-	
-
-
-
-
-
+;idt.inc
+;Author: Josh Holtrop
+;Date: 10/30/03
+;Modified: 07/06/04
+
+idtr:
+	dw	50*8-1		;size of idt
+	dd	IDT_V		;address of idt
+
+
+%macro isr_label 1
+isr_%1:
+	push	eax
+	mov	eax, %1
+	jmp	isr_main
+%endmacro
+
+isr_label	0
+isr_label	1
+isr_label	2
+isr_label	3
+isr_label	4
+isr_label	5
+isr_label	6
+isr_label	7
+isr_label	8
+isr_label	9
+isr_label	10
+isr_label	11
+isr_label	12
+isr_label	13
+isr_label	14
+isr_label	15
+isr_label	16
+isr_label	17
+isr_label	18
+isr_label	19
+isr_label	20
+isr_label	21
+isr_label	22
+isr_label	23
+isr_label	24
+isr_label	25
+isr_label	26
+isr_label	27
+isr_label	28
+isr_label	29
+isr_label	30
+isr_label	31
+isr_label	32
+isr_label	33
+isr_label	34
+isr_label	35
+isr_label	36
+isr_label	37
+isr_label	38
+isr_label	39
+isr_label	40
+isr_label	41
+isr_label	42
+isr_label	43
+isr_label	44
+isr_label	45
+isr_label	46
+isr_label	47
+isr_label	48
+isr_label	49
+
+isr_main:
+	pusha
+	push	ds
+	push	es
+
+	push	eax	;interrupt number
+	call	_isr
+	add	esp, 4
+
+	pop	es
+	pop	ds
+	popa
+	pop	eax		;original saved eax
+
+	iret
+
+
+
+
+
+
+
+
+

kernel/kernel.c

@@ -0,0 +1,76 @@
+
+#include "kernel.h"
+#include "multiboot.h"
+#include "module.h"
+
+mb_info_t mb_info_block;
+mb_mmap_t mb_mmap[MAX_MMAP];
+mb_module_t mb_modules[MAX_MODULES];
+mb_apm_t mb_apm_table;
+char mb_cmdline[256];
+
+/* This function runs in segmented memory - 0xC000_0000 is mapped to 0x0 but 0x0
+   itself is an invalid linear address. Therefore, the multiboot information addresses
+   must be manually adjusted by VIRT_OFFSET to become valid linear addresses. */
+int k_mbsave(mb_info_t *mbinfo, unsigned int mb_magic)
+{
+	if (mb_magic != MULTIBOOT_BOOTLOADER_MAGIC)
+	{
+		char *msg = "Bad multiboot magic identifier!";
+		char *dest = (char *) 0xC00B8000;
+		while (*msg)
+		{
+			*dest++ = *msg++;
+			*dest++ = 0x04;		//red error message
+		}
+		for (;;) ;
+	}
+	mb_info_block = *mbinfo;
+	if (mb_info_block.flags & MB_BOOTLOADER_COMMAND_LINE)
+	{
+		mb_info_block.cmdline += VIRT_OFFSET;
+		memcpy(mb_cmdline, mb_info_block.cmdline, 256);
+		mb_cmdline[255] = 0;
+	}
+	if (mb_info_block.flags & MB_BOOTLOADER_MODS)
+	{
+		mb_info_block.mods_addr += VIRT_OFFSET;
+		int i;
+		for (i = 0; i < mb_info_block.mods_count && i < MAX_MODULES; i++)
+		{
+			mb_modules[i] = ((mb_module_t *)mb_info_block.mods_addr)[i];
+		}
+	}
+	if (mb_info_block.flags & MB_BOOTLOADER_MMAP)
+	{
+		mb_info_block.mmap_addr += VIRT_OFFSET - 4;	//-4 to get to size field, not base_addr_low field
+		mb_mmap_t *mmap = (mb_mmap_t *)mb_info_block.mmap_addr;
+		int i, sz = 0;
+		for (i = 0; sz < mb_info_block.mmap_length && i < MAX_MMAP; i++)
+		{
+			sz += mmap->size;
+			mb_mmap[i] = *mmap;
+			mmap = (mb_mmap_t *)(((u32_t) mmap) + mmap->size);
+		}
+	}
+	if (mb_info_block.flags & MB_BOOTLOADER_APM)
+	{
+		mb_info_block.apm_table += VIRT_OFFSET;
+		mb_apm_table = *(mb_apm_t *)mb_info_block.apm_table;
+	}
+	return 0;
+}
+
+void k_init()
+{
+	for (;;)
+	{
+		(*(char*)0xC00B8000)++;
+	}
+}
+
+void isr()
+{
+	for (;;) ;
+}
+

kernel/link.ld

@@ -1,8 +1,8 @@
 OUTPUT_FORMAT("binary")
-ENTRY(start)
+ENTRY(_start)
 SECTIONS
 {
-  .text  0x100000 : {
+  .text  0xC0108000 : {
     code = .; _code = .; __code = .;
     *(.text)
     . = ALIGN(4096);
@@ -10,10 +10,14 @@ SECTIONS
   .data  : {
     data = .; _data = .; __data = .;
     *(.data)
+/*    . = ALIGN(4096); */
+  }
+  .rodata  : {
+    rodata = .; _rodata = .; __rodata = .;
+    *(.rodata)
     . = ALIGN(4096);
   }
-  .bss  :
-  {
+  .bss  : {
     bss = .; _bss = .; __bss = .;
     *(.bss)
     . = ALIGN(4096);

keyboard.c

@@ -1,250 +0,0 @@
-//Keyboard.c
-// Created: 04/17/03 Josh Holtrop
-// Modified: 09/09/03
-//for HOS
-
-#define KBD_BUFFER_LENGTH 64
-
-byte kbdFlags = 0;
-byte kbdAscii = 0;
-byte kbdScan = 0;
-
-dword kbdBuffer[KBD_BUFFER_LENGTH];
-int kbdBufferStart = 0;
-int kbdBufferLen = 0;
-byte kbdExt = 0;
-byte kbdExt2 = 0;
-byte ackReason = 0;		//used to record the reason why we would get an acknowledge byte (0xFA)
-
-
-                                   //nul esc            bksp tab              lctl            lsft            rsft lalt caps F1  F2  F3  F4  F5  F6  F7  F8  F9  F10 numScrlNumPad-------                                  unknown---- F11 F12 unknown....
-const byte SCAN2ASCII[128]      = "\000\0331234567890-=\010\011qwertyuiop[]\n\001asdfghjkl;'`\001\\zxcvbnm,./\001*\001 \001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001-\001\001\001+\001\001\001\001\001\002\002\002\001\001\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002";
-const byte SCAN2ASCIISHIFT[128] = "\000\033!@#$%^&*()_+\010\011QWERTYUIOP{}\n\001ASDFGHJKL:\"~\001|ZXCVBNM<>?\001*\001 \001\001\001\001\001\001\001\001\001\001\001\001\001789-456+1230.\002\002\002\001\001\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002\002";
-
-//====FUNCTIONS:
-
-void isr_keyboard()
-{
-	kbdScan = inportb(0x60);
-	//printf("\nKEYBOARD INTERRUPT: 0x%x", kbdScan);
-	byte inState = inportb(0x61);
-	outportb(0x61, inState|0x80);
-	outportb(0x61, inState);
-	
-	//printf("IRQ 1: %x\n", kbdScan);
-
-	if (kbdScan == 0xFA)	//250					//ACKnowledge
-	{
-		if (ackReason == 0xED)					//reset LEDs
-		{
-			outportb(0x64, (kbdFlags & 0x07));
-			printf("KBD_ACK!");
-		}
-		ackReason = 0;
-	}
-	if (kbdScan == 224)							//extended key
-	{
-		kbdExt = 1;
-		eoi();
-		return;
-	}
-	if (kbdScan == 225)
-	{
-		kbdExt2 = 2;
-		eoi();
-		return;
-	}
-
-//====handle control keys::
-	kbdAscii = 2;
-	switch (kbdScan)							//control keys
-	{
-		case KBD_SCAN_LSHIFT:
-			kbdFlags |= KBD_SHIFT;
-			kbdAscii = 1;
-			break;
-		case KBD_SCAN_RSHIFT:
-			kbdFlags |= KBD_SHIFT;
-			kbdAscii = 1;
-			break;
-		case KBD_SCAN_LCTRL:
-			kbdFlags |= KBD_CTRL;
-			kbdAscii = 1;
-			break;
-		case KBD_SCAN_LALT:
-			kbdFlags |= KBD_ALT;			
-			kbdAscii = 1;
-			break;
-
-		case KBD_SCAN_LSHIFT + KBD_SCAN_RELEASED:
-			kbdFlags &= (KBD_SHIFT ^ 0xFF);
-			kbdAscii = 1;
-			break;
-		case KBD_SCAN_RSHIFT + KBD_SCAN_RELEASED:
-			kbdFlags &= (KBD_SHIFT ^ 0xFF);
-			kbdAscii = 1;
-			break;
-		case KBD_SCAN_LCTRL + KBD_SCAN_RELEASED:
-			kbdFlags &= (KBD_CTRL ^ 0xFF);
-			kbdAscii = 1;
-			break;
-		case KBD_SCAN_LALT + KBD_SCAN_RELEASED:
-			kbdFlags &= (KBD_ALT ^ 0xFF);
-			kbdAscii = 1;
-			break;
-
-		case KBD_SCAN_CAPS+KBD_SCAN_RELEASED:
-			kbdFlags ^= KBD_CAPS;
-			kbdAscii = 1;
-			kbd_resetLEDs();			//update LEDs
-			break;
-		case KBD_SCAN_SCROLL+KBD_SCAN_RELEASED:
-			kbdFlags ^= KBD_SCROLL;
-			kbdAscii = 1;
-			kbd_resetLEDs();			//update LEDs
-			break;
-		case KBD_SCAN_NUM+KBD_SCAN_RELEASED:
-			kbdFlags ^= KBD_NUM;
-			kbdAscii = 1;
-			kbd_resetLEDs();			//update LEDs
-			break;
-	}
-	if (kbdAscii == 1)
-	{
-		if (kbdExt > 0)
-			kbdExt--;
-		eoi();
-		return;
-	}
-//====determine ASCII value of key::
-	if (kbdExt > 0)						//extended key, kbdScan holds extended key
-	{
-		kbdExt--;
-		kbdAscii = 1;
-		switch (kbdScan)
-		{
-			case KBD_SCANE_ENTER:
-				kbdAscii = '\n';	break;
-			case 53:				// '/' character (divide on numpad)
-				kbdAscii = '/';		break;
-		}
-	}
-	else if (kbdExt2 > 0)					//extended key 2
-	{
-		kbdExt2--;
-//		if (kbdScan == 69)				// (pause|break)
-//			kbdAscii = 2;				//flag ascii value of 1 means control character (pausebreak)
-//		else
-			kbdAscii = 2;				//flag ascii value of 2 means ignore key (or unknown value)
-	}
-	else							//not an extended key
-	{
-			// if letter key
-		if (((kbdScan >= 16) && (kbdScan <= 25)) || ((kbdScan >= 30) && (kbdScan <= 38)) || ((kbdScan >= 44) && (kbdScan <= 50)))
-		{
-			// if caps and shift are different (either one pressed, not both)
-			if (((kbdFlags & KBD_SHIFT) != 0) & ((kbdFlags & KBD_CAPS) != 0))
-				kbdAscii = SCAN2ASCII[kbdScan & 0x7F];
-			else if (((kbdFlags & KBD_SHIFT) == 0) & ((kbdFlags & KBD_CAPS) == 0))
-				kbdAscii = SCAN2ASCII[kbdScan & 0x7F];
-			else
-				kbdAscii = SCAN2ASCIISHIFT[kbdScan & 0x7F];
-		}
-			// if numpad key
-		else if ((kbdScan >= 71) && (kbdScan <= 83))
-		{
-			// if numlock on
-			if (kbdFlags & KBD_NUM)
-				kbdAscii = SCAN2ASCIISHIFT[kbdScan & 0x7F];
-			else
-				kbdAscii = SCAN2ASCII[kbdScan & 0x7F];
-		}
-			// other key
-		else
-		{
-			if ((kbdFlags & KBD_SHIFT) != 0)
-				kbdAscii = SCAN2ASCIISHIFT[kbdScan & 0x7F];
-			else
-				kbdAscii = SCAN2ASCII[kbdScan & 0x7F];
-		}
-	}
-
-//====do something with key::
-	if ((kbdScan == 83) & ((kbdFlags & KBD_CTRL) != 0) & ((kbdFlags & KBD_ALT) != 0))
-	{
-		printf("Initiating reboot.");
-		restart();
-	}
-	if (kbdAscii == 2)							//unknown key / ignore key
-	{
-		eoi();
-		return;
-	}
-	if (kbdScan < KBD_SCAN_RELEASED)					//a key was pressed, save it
-	{
-		if (kbdBufferLen >= KBD_BUFFER_LENGTH)				//no key slots available
-		{
-			eoi();
-			return;
-		}
-		else
-		{
-			kbdBuffer[(kbdBufferStart+kbdBufferLen++)%KBD_BUFFER_LENGTH] = (dword) ((kbdFlags << 16) | (kbdScan << 8) | kbdAscii);
-//			printf("S:%d\tL:%d\tR:%x\n", kbdBufferStart, kbdBufferLen, kbdBuffer[kbdBufferStart]);
-		}
-	}
-
-	eoi();
-
-//	if (key == 0xFA)							//ACKnowledge
-//		outportb(0x60, 0x3);
-}
-
-inline byte switchCase(byte asciiCode)
-{
-	if ((asciiCode >= 'A') & (asciiCode <= 'Z'))
-		return (asciiCode + ('a' - 'A'));
-	if ((asciiCode >= 'a') & (asciiCode <= 'z'))
-		return (asciiCode - ('a' - 'A'));
-	return asciiCode;
-}
-
-dword kbdGetKey()
-{
-	if (kbdBufferLen == 0)					//buffer empty
-		return 0;
-	dword retVal = kbdBuffer[kbdBufferStart];
-	kbdBufferStart++;
-	kbdBufferLen--;
-	if (kbdBufferStart >= KBD_BUFFER_LENGTH)
-		kbdBufferStart = 0;
-	return retVal;
-}
-
-dword kbdWaitKey()
-{
-	for (;;)
-	{
-		if (kbdBufferLen != 0)					//buffer empty
-			break;
-	}		
-	dword retVal = kbdBuffer[kbdBufferStart];
-	kbdBufferStart++;
-	kbdBufferLen--;
-	if (kbdBufferStart >= KBD_BUFFER_LENGTH)
-		kbdBufferStart = 0;
-	return retVal;
-}
-
-inline void kbd_resetLEDs()
-{
-	outportb(0x64, 0xED);
-	//outportb(0x64, (kbdFlags & 0x07));
-	ackReason = 0xED;
-}
-
-
-
-
-
-

keyboard.h

@@ -1,47 +0,0 @@
-//Keyboard.h
-// Created: 04/17/03 Josh Holtrop
-// Modified: 05/07/03
-//for HOS
-
-#define KBD_SCROLL 0x01
-#define KBD_NUM 0x02
-#define KBD_CAPS 0x04
-#define KBD_SHIFT 0x10
-#define KBD_CTRL 0x20
-#define KBD_ALT 0x40
-
-#define KBD_SCAN_RELEASED 128
-
-#define KBD_SCAN_LCTRL 29
-#define KBD_SCAN_LSHIFT 42
-#define KBD_SCAN_RSHIFT 54
-#define KBD_SCAN_LALT 56
-#define KBD_SCAN_SCROLL 70
-#define KBD_SCAN_CAPS 58
-#define KBD_SCAN_NUM 69
-
-#define KBD_SCANE_PRINTSCREEN 55
-#define KBD_SCANE_INS 82
-#define KBD_SCANE_HOME 71
-#define KBD_SCANE_PGUP 73
-#define KBD_SCANE_DEL 83
-#define KBD_SCANE_END 79
-#define KBD_SCANE_PGDN 81
-#define KBD_SCANE_ENTER 28
-
-#define KBD_SCANE_NULL 42
-
-
-
-//====PROTOTYPES:
-
-void isr_keyboard();
-inline void kbd_resetLEDs();
-inline byte kbd_ascii(dword keycode);
-inline byte kbd_scancode(dword keycode);
-inline byte kbd_flags(dword keycode);
-inline byte switchCase(byte asciiCode);
-dword kbdGetKey();
-dword kbdWaitKey();
-
-

lib/defines.h

@@ -1,7 +0,0 @@
-
-typedef unsigned int dword;
-typedef unsigned short word;
-typedef unsigned char byte;
-
-
-

lib/io.asm

@@ -1,532 +0,0 @@
-
-%macro jzfar 1
-	jnz	%%skip
-	jmp	%1
-%%skip:
-
-%endmacro
-
-[global _writeCursorPosition]
-[global _getCursorPosition]
-[global _putc]
-[global _puts]
-[global _printf]
-[global _console_scroll]
-[global _console_cls]
-[global _putHex]
-[global _putDec]
-[global _putDecu]
-
-
-;
-;void writeCursorPosition(word pos)
-;
-_writeCursorPosition:
-	push	ebp
-	mov	ebp, esp
-
-	push	eax
-	push	ebx
-	push	edx
-
-	mov	eax, [ebp+8]	;cursor position in ax
-
-	mov	bl, al
-	mov	dx, 0x03D4
-	mov	al, 0x0E
-	out	dx, al
-
-	inc	dx
-	mov	al, ah
-	out	dx, al
-
-	dec	dx
-	mov	al, 0x0F
-	out	dx, al
-
-	inc	dx
-	mov	al, bl
-	out	dx, al
-
-	pop	edx
-	pop	ebx
-	pop	eax
-	pop	ebp
-
-	ret
-
-
-;
-;word getCursorPosition()
-;
-_getCursorPosition:
-	push	ebx
-	push	edx
-
-	xor	eax, eax
-	mov	dx, 0x03D4
-	mov	al, 0x0E
-	out	dx, al
-
-	inc	dx
-	in	al, dx
-	mov	bl, al
-
-	dec	dx
-	mov	al, 0x0F
-	out	dx, al
-
-	inc	dx
-	in	al, dx
-	mov	ah, bl
-
-	pop	edx
-	pop	ebx
-
-	ret
-
-
-;
-;int putc(int chr)
-;
-_putc:
-	push	ebp
-	mov	ebp, esp
-	push	ebx
-	push	ecx
-	push	edx
-
-	call	_getCursorPosition
-	mov	ebx, eax
-	mov	ecx, ebx
-
-	mov	eax, [ebp+8]			;al=character
-	cmp	al, 10				;newline
-	jz	putc_newline
-	cmp	al, 9				;tab
-	jz	putc_tab	
-
-	shl	ebx, 1
-	add	ebx, 0xb8000
-	mov	ah, 0x07
-	mov	[ebx], ax
-	mov	eax, ecx
-	inc	eax
-	cmp	eax, 2000
-	jnz	putc_writeit2
-	call	_console_scroll
-	mov	eax, 2000-80
-putc_writeit2:
-	push	eax
-	call	_writeCursorPosition
-	add	esp, 4
-	jmp	putc_done
-
-putc_newline:
-	mov	eax, ebx			;eax = cursor position
-	mov	ebx, 80
-	xor	edx, edx
-	div	bx				;ax=dx:ax/bx, dx=remainder
-	mov	bx, 80
-	sub	bx, dx
-	mov	eax, ecx
-	add	eax, ebx			;eax = new cursor position
-	cmp	eax, 2000
-	jnz	putc_newline_writeit2
-	call	_console_scroll
-	mov	eax, 2000-80			;beginning of last row
-putc_newline_writeit2:
-	push	eax
-	call	_writeCursorPosition
-	add	esp, 4
-	jmp	putc_done
-
-putc_tab:
-	mov	eax, ebx			;eax = cursor position
-	mov	ebx, 8
-	div	bl				;al=ax/bl, ah=remainder
-	xor	edx, edx
-	mov	dl, ah
-	mov	bx, 8
-	sub	bx, dx
-	mov	eax, ecx
-	add	eax, ebx			;eax = new cursor position
-	cmp	eax, 2000
-	jnz	putc_tab_writeit2
-	call	_console_scroll
-	mov	eax, 2000-80			;beginning of last row
-putc_tab_writeit2:
-	push	eax
-	call	_writeCursorPosition
-	add	esp, 4
-
-putc_done:
-	pop	edx
-	pop	ecx
-	pop	ebx
-	pop	ebp
-
-	ret
-
-
-
-;
-;void printf(char *fmt, ... )
-;
-_printf:
-	push	ebp
-	mov	ebp, esp
-	pusha
-	mov	ebx, [ebp+8]			;ebx = position in format string
-	mov	esi, ebp
-	add	esi, 12				;esi = to next variable arg
-	xor	ecx, ecx			;ecx used if we encounter a '%'
-printf_loop:
-	mov	al, [ebx]
-	inc	ebx
-	cmp	al, 0
-	jzfar	printf_done
-	cmp	ecx, 1
-	jz	printf_special
-	cmp	al, '%'
-	jzfar	printf_percent
-
-	push	eax
-	call	_putc
-	add	esp, 4
-	jmp	printf_loop
-
-printf_special:
-	xor	ecx, ecx
-	cmp	al, 'd'
-	jz	printf_decimal
-	cmp	al, 'u'
-	jz	printf_decimalu
-	cmp	al, 'x'
-	jz	printf_hex
-	cmp	al, '%'
-	jz	printf_ppercent
-	cmp	al, 's'
-	jz	printf_string
-	cmp	al, 'c'
-	jz	printf_char
-	jmp	printf_special_done
-
-printf_decimal:
-	mov	eax, [esi]
-	push	eax
-	call	_putDec
-	add	esp, 4
-	jmp	printf_special_done
-
-printf_decimalu:
-	mov	eax, [esi]
-	push	eax
-	call	_putDecu
-	add	esp, 4
-	jmp	printf_special_done
-
-printf_hex:
-	mov	eax, [esi]
-	push	eax
-	call	_putHex
-	add	esp, 4
-	jmp	printf_special_done
-
-printf_ppercent:
-	push	eax
-	call	_putc
-	add	esp, 4
-	jmp	printf_special_done
-
-printf_string:
-	mov	eax, [esi]
-	push	eax
-	call	_puts
-	add	esp, 4
-	jmp	printf_special_done
-
-printf_char:
-	mov	eax, [esi]
-	push	eax
-	call	_putc
-	add	esp, 4
-	jmp	printf_special_done
-
-printf_special_done
-	add	esi, 4				;point to next extra argument
-	jmp	printf_loop
-
-printf_percent:
-	mov	ecx, 1
-	jmp	printf_loop
-
-
-printf_done:
-	popa
-	pop	ebp
-	ret
-
-
-
-;
-;void console_scroll()
-;
-_console_scroll:
-	pusha
-	mov	esi, 0xb8000+160
-	mov	edi, 0xb8000
-	mov	ecx, 960			;(2000-80)/2
-console_scroll_loop:
-	lodsd
-	stosd
-	loop	console_scroll_loop
-	mov	ax, 0x0720
-	mov	ecx, 80
-console_scroll_loop2:
-	stosw
-	loop	console_scroll_loop2
-	popa
-	ret
-
-;
-;void console_cls()
-;
-_console_cls:
-	pusha
-	mov	edi, 0xb8000
-	mov	ax, 0x0720
-	mov	ecx, 2000
-console_cls_loop:
-	stosw
-	loop	console_cls_loop
-	push	dword 0
-	call	_writeCursorPosition
-	add	esp, 4
-	popa
-	ret
-
-;
-;int putHex(dword number)
-;
-_putHex:
-	push	ebp
-	mov	ebp, esp
-	pusha
-	mov	eax, [ebp+8]			;eax = number to print
-	xor	ebx, ebx			;we have not printed a character yet
-	mov	ecx, 8				;counter for number of characters
-
-putHex_loop:
-	push	eax
-	push	ecx
-
-	dec	ecx
-	shl	ecx, 2				;edx=counter*4 (amount to shift by)
-	shr	eax, cl
-	and	eax, 0x0F
-	cmp	cl, 0
-	jz	putHex_notzero			;if number is 0
-	cmp	al, 0
-	jnz	putHex_notzero
-	cmp	bl, 0
-	jz	putHex_loop_end
-putHex_notzero:
-	mov	bl, 1
-	add	eax, '0'
-	cmp	eax, '9'
-	jbe	putHex_dontadjust
-	add	eax, 'A'-'9'-1
-putHex_dontadjust:
-	push	eax
-	call	_putc
-	add	esp, 4
-
-putHex_loop_end:
-	pop	ecx
-	pop	eax
-	loop	putHex_loop
-
-	popa
-	pop	ebp
-	ret
-
-
-;
-;int puts(char *str)
-;
-_puts:
-	push	ebp
-	mov	ebp, esp
-	push	esi
-	push	eax
-	mov	esi, [ebp+8]			;esi = to string
-puts_loop:
-	lodsb
-	cmp	al, 0
-	jz	puts_done
-	push	eax
-	call	_putc
-	add	esp, 4
-	jmp	puts_loop
-
-puts_done:
-	pop	eax
-	pop	esi
-	pop	ebp
-	ret
-
-
-
-
-
-
-_putDecu:
-	push	ebp
-	mov	ebp, esp
-	sub	esp, 24
-	mov	DWORD [ebp-4], 1
-	mov	BYTE [ebp-5], 0
-L2:
-	mov	edx, DWORD [ebp+8]
-	mov	eax, -858993459
-	mul	edx
-	mov	eax, edx
-	shr	eax, 3
-	cmp	eax, DWORD [ebp-4]
-	jae	L4
-	jmp	L3
-L4:
-	mov	eax, DWORD [ebp-4]
-	mov	edx, eax
-	sal	edx, 2
-	add	edx, eax
-	lea	eax, [edx+edx]
-	mov	DWORD [ebp-4], eax
-	jmp	L2
-L3:
-	nop
-L5:
-	cmp	DWORD [ebp-4], 1
-	ja	L7
-	jmp	L6
-L7:
-	mov	edx, DWORD [ebp+8]
-	mov	eax, edx
-	mov	edx, 0
-	div	DWORD [ebp-4]
-	mov	DWORD [ebp-12], eax
-	mov	al, BYTE [ebp-12]
-	mov	BYTE [ebp-5], al
-	mov	eax, 0
-	mov	al, BYTE [ebp-5]
-	imul	eax, DWORD [ebp-4]
-	sub	DWORD [ebp+8], eax
-	mov	edx, DWORD [ebp-4]
-	mov	eax, -858993459
-	mul	edx
-	mov	eax, edx
-	shr	eax, 3
-	mov	DWORD [ebp-4], eax
-	lea	eax, [ebp-5]
-	add	BYTE [eax], 48
-	sub	esp, 12
-	mov	eax, 0
-	mov	al, BYTE [ebp-5]
-	push	eax
-	call	_putc
-	add	esp, 16
-	jmp	L5
-L6:
-	sub	esp, 12
-	mov	al, BYTE [ebp+8]
-	add	eax, 48
-	and	eax, 255
-	push	eax
-	call	_putc
-	add	esp, 16
-	leave
-	ret
-
-
-
-
-_putDec:
-	push	ebp
-	mov	ebp, esp
-	sub	esp, 24
-	cmp	DWORD [ebp+8], 0
-	jns	L9
-	sub	esp, 12
-	push	45
-	call	_putc
-	add	esp, 16
-	neg	DWORD [ebp+8]
-L9:
-	mov	DWORD [ebp-4], 1
-	mov	BYTE [ebp-5], 0
-L10:
-	mov	eax, DWORD [ebp+8]
-	cmp	eax, DWORD [ebp-4]
-	jae	L12
-	jmp	L11
-L12:
-	mov	eax, DWORD [ebp-4]
-	mov	edx, eax
-	sal	edx, 2
-	add	edx, eax
-	lea	eax, [edx+edx]
-	mov	DWORD [ebp-4], eax
-	jmp	L10
-L11:
-	mov	edx, DWORD [ebp-4]
-	mov	eax, -858993459
-	mul	edx
-	mov	eax, edx
-	shr	eax, 3
-	mov	DWORD [ebp-4], eax
-L13:
-	cmp	DWORD [ebp-4], 1
-	ja	L15
-	jmp	L14
-L15:
-	mov	edx, DWORD [ebp+8]
-	mov	eax, edx
-	mov	edx, 0
-	div	DWORD [ebp-4]
-	mov	DWORD [ebp-12], eax
-	mov	al, BYTE [ebp-12]
-	mov	BYTE [ebp-5], al
-	mov	eax, 0
-	mov	al, BYTE [ebp-5]
-	imul	eax, DWORD [ebp-4]
-	sub	DWORD [ebp+8], eax
-	mov	edx, DWORD [ebp-4]
-	mov	eax, -858993459
-	mul	edx
-	mov	eax, edx
-	shr	eax, 3
-	mov	DWORD [ebp-4], eax
-	lea	eax, [ebp-5]
-	add	BYTE [eax], 48
-	sub	esp, 12
-	mov	eax, 0
-	mov	al, BYTE [ebp-5]
-	push	eax
-	call	_putc
-	add	esp, 16
-	jmp	L13
-L14:
-	sub	esp, 12
-	mov	al, BYTE [ebp+8]
-	add	eax, 48
-	and	eax, 255
-	push	eax
-	call	_putc
-	add	esp, 16
-	leave
-	ret
-
-
-
-

lib/io.h

@@ -1,18 +0,0 @@
-
-
-#ifndef __HIO_H__
-#define __HIO_H__ __HIO_H__
-
-void writeCursorPosition(dword pos);
-dword getCursorPosition();
-int putc(dword chr);
-int printf(char *fmt, ...);
-int puts(char *str);
-int putDec(int number);
-int putDecu(dword number);
-int putHex(dword number);
-void console_cls();
-void console_scroll();
-
-#endif
-

lib/string.c

@@ -1,13 +0,0 @@
-
-#include "string.h"
-
-int strlen(char *str)
-{
-	int retn = 0;
-	while (*str++ != 0)
-		retn++;
-	return retn;
-}
-
-
-

lib/string.h

@@ -1,8 +0,0 @@
-
-#ifndef __HSTRING_H__
-#define __HSTRING_H__ __HSTRING_H__
-
-int	strlen(char *str);
-
-#endif
-

menu.lst

@@ -0,0 +1,9 @@
+
+timeout 10
+default 0
+
+title HOS 0.15
+root (fd0)
+kernel /kernel.bin
+
+

mm.c

@@ -1,254 +0,0 @@
-// mm.c
-// 09/01/03 Josh Holtrop
-
-// 0x368000 is first available byte (this is right after the kernel @ 1mb and the initrd @ 2mb, 1440kb.
-
-
-pageblock *first_pageblock = (pageblock *) 0;
-dword	mm_totalmem = 0x100000;				//start counting from 1mb
-
-void	mm_init()
-{
-	dword	*memmap_entries = (dword *) 0x9040A;
-	memmap_entry	*maps = (memmap_entry *) 0x92000;
-	dword a;
-	for (a=0;a<(*memmap_entries);a++)
-	{
-		if (maps[a].attributes == 1)		// (1) mem free to OS
-		{
-			mm_totalmem += maps[a].limit.lowdword;
-			if  ((maps[a].base.lowdword + maps[a].limit.lowdword) > (FREERAM_START+8192))	//goes past where we start freeram
-			{
-				if (maps[a].base.lowdword < FREERAM_START)
-				{
-					maps[a].limit.lowdword = maps[a].limit.lowdword - (FREERAM_START - maps[a].base.lowdword);
-					maps[a].base.lowdword = FREERAM_START;	//block at least 4kb, starts >= FREERAM_START
-				}
-				if (first_pageblock == 0)	//no pageblock page set up yet, so set it up here
-				{
-					first_pageblock = (pageblock *) maps[a].base.lowdword;
-					maps[a].base.lowdword += 4096;
-					maps[a].limit.lowdword -= 4096;
-					mm_init_pageblockpage(first_pageblock);
-					first_pageblock->base = maps[a].base.lowdword;
-					first_pageblock->length = maps[a].limit.lowdword / 4096;
-					first_pageblock->pid = MM_PB_AVAIL;
-				}
-				else				//first_pageblock already set up, add on segment
-				{
-					pageblock *pb = first_pageblock;
-					for (;;)
-					{
-						if (pb->pid == MM_PB_NP)
-							break;
-						else
-							pb++;
-					}
-					pb->base = maps[a].base.lowdword;
-					pb->length = maps[a].limit.lowdword / 4096;
-					pb->pid = MM_PB_AVAIL;
-				}
-			}
-		}
-	}
-	if (first_pageblock == 0)
-	{
-		printf("ERROR! NO INITIAL PAGE BLOCK CREATED.");
-		asm("cli");
-		asm("hlt");
-		for (;;)
-		;
-	}
-}
-
-
-
-
-void	mm_init_pageblockpage(pageblock *pbp)
-{
-	int a;
-	for (a=0; a<256; a++)       				// 256 pageblock entries * 16 bytes per page block entry = 4096 bytes (1 page of pageblock entries)
-	{
-		pbp[a].base = 0;
-		pbp[a].length = 0;
-		pbp[a].pid = MM_PB_NP;
-		if (a<255)
-			pbp[a].link = (dword)(&pbp[a+1]);
-		else
-			pbp[a].link = 0;
-	}
-}
-
-
-void   *mm_palloc(dword numpages, dword proc_pid)
-{
- 	if (proc_pid < KERNEL_PID)
- 		return 0;
-	pageblock *pb = first_pageblock;
-	if (mm_freeentries() < 2)
-	{
-		if(mm_new_pageblock_page() == 0)
-			return 0;
-	}
-	pageblock *newentry = mm_nextpageblockentry();
-	for (;;)
-	{
-		if ((pb->pid == MM_PB_AVAIL) && (pb->length >= numpages))
-			break;
-		if (pb->link == 0)
-			return 0;
-		pb = (pageblock *)pb->link;
-	}
-	if (pb->length == numpages)		//dont need a new entry, just mark this one as used :)
-	{
-		pb->pid = proc_pid;
-		return (void *)pb->base;
-	}
-	else					//subtract out allocated number of pages from length
-	{
-		newentry->base = pb->base;
-		newentry->length = numpages;
-		newentry->pid = proc_pid;
-		pb->base += (numpages * 4096);
-		pb->length -= numpages;
-		return (void *)newentry->base;
-	}
-}
-
-
-dword	mm_freeentries()
-{
-	pageblock *pb = first_pageblock;
-	dword counter = 0;
-	for (;;)
-	{
-		if (pb->pid == MM_PB_NP)
-			counter++;
-		if (pb->link == 0)
-			return counter;
-		pb = (pageblock *) pb->link;
-	}
-}
-
-
-pageblock *mm_new_pageblock_page()  	//as of 09/26/03 this method leaks 4kb main memory per call, unrecoverable
-{
-	pageblock *pb = first_pageblock;
-	for (;;)
-	{
-		if ((pb->pid == MM_PB_AVAIL) && (pb->length > 1))
-		{
-			pageblock *retval = (pageblock *)pb->base;
-			pb->base += 4096;
-			pb->length--;
-			mm_init_pageblockpage(retval);			//zeros out, links new pageblock page
-			mm_lastpageblockentry()->link = (dword)retval;	//set up link to new pageblock page
-			return retval;
-		}
-		pb = (pageblock *) pb->link;
-		if (pb == 0)
-			return 0;
-	}
-}
-
-
-int	mm_pfree(void *ptr)
-{
- 	if (ptr == 0)
- 		return 2;
-	pageblock *pb = first_pageblock;
-	dword tofree = (dword) ptr;
-	for (;;)
-	{
-		if (pb->base == tofree)		// && (pb->pid == MM_PB_USED))
-		{
-			pb->pid = MM_PB_AVAIL;		//found block, mark available / coalesce it
-			mm_coalesce(pb);
-			return 0;
-		}
-		if (pb->link == 0)
-			return 1;
-		pb = (pageblock *) pb->link;
-	}
-}
-
-
-pageblock *mm_lastpageblockentry()
-{
-	pageblock *pb = first_pageblock;
-	for (;;)
-	{
-		if (pb->link == 0)
-			return pb;
-		pb = (pageblock *)pb->link;
-	}
-}
-
-
-pageblock *mm_nextpageblockentry()
-{
-	pageblock *pb = first_pageblock;
-	for (;;)
-	{
-		if (pb->pid == MM_PB_NP)
-			return pb;
-		if (pb->link == 0)
-			return 0;
-		pb = (pageblock *)pb->link;
-	}
-}
-
-
-dword mm_freemem()
-{
-	dword amount = 0;
-	pageblock *pb = first_pageblock;
-	for (;;)
-	{
-		if (pb->pid == MM_PB_AVAIL)
-			amount += (pb->length)*4096;
-		if (pb->link == 0)
-			return amount;
-		pb = (pageblock *) pb->link;
-	}
-}
-
-
-void	mm_coalesce(pageblock *pb)
-{
-	pageblock *pbc = first_pageblock;
-	for (;;)
-	{
-		if (pbc->pid == pb->pid)	//pid fields must match, both same process, both avail, or both not present
-		{
-			if ((pbc->base + (pbc->length * 4096)) == pb->base)	//pbc ends where pb starts
-			{
-				pbc->length += pb->length;
-				pb->pid = MM_PB_NP;
-				mm_coalesce(pbc);			//recursion: checks for any more page blocks to coalesce if one found
-				return;					//exit this recursion...
-			}
-			if ((pb->base + (pb->length * 4096)) == pbc->base)	//pb ends where pbc starts
-			{
-				pb->length += pbc->length;
-				pbc->pid = MM_PB_NP;
-				mm_coalesce(pb);
-				return;
-			}
-		}
-		if (pbc->link == 0)
-			return;
-		pbc = (pageblock *)pbc->link;
-	}
-}
-
-
-
-
-
-
-
-
-
-
-

mm.h

@@ -1,35 +0,0 @@
-
-
-typedef struct {
-	qword	base;
-	qword	limit;
-	dword	attributes;
-} __attribute__((packed)) memmap_entry;
-
-
-typedef struct {
-	dword	base;
-	dword	length;				//in pages
-	dword	pid;                            //normally PID of process, use NP, AVAIL for special flags
-	dword	link;				//leave dword instead of pointer so i dont have to worry about pointer arithmetic
-} __attribute__ ((packed)) pageblock;		//16 byte pageblock entry - 256 entries = 1 page
-
-
-void	mm_init();
-void	mm_init_pageblockpage(pageblock *pbp);
-void   *mm_palloc(dword numpages, dword proc_pid);
-void	mm_coalesce(pageblock *pb);
-int	mm_pfree(void *ptr);
-dword	mm_freeentries();
-dword	mm_freemem();
-pageblock *mm_new_pageblock_page();
-pageblock *mm_lastpageblockentry();
-pageblock *mm_nextpageblockentry();
-
-
-#define MM_PB_NP 0x00		//00000000
-#define MM_PB_AVAIL 0x01	//00000001
-
-
-
-

mouse.c

@@ -1,56 +0,0 @@
-// mouse.c
-// 10/03/03
-// Author: Josh Holtrop
-
-
-void mouse_init()
-{
-	outportb(0x64, 0x20);		//tell keyboard controller we are going to read keyboard controller command byte
-	byte temp = inportb(0x60);	//read keyboard controller command byte
-	outportb(0x64, 0x60);		//tell keyboard controller we are going to write keyboard controller command byte
-	outportb(0x60, 0x03 | (temp&0x40));	//write keyboard controller command byte: enable mouse/keyboard ints, include original XLATE bit from temp (bit6)
-
- 	outportb(0x64, 0xA8);	//enable mouse port
-
-	outportb(0x64, 0xD4);	//send command to mouse, not kbd
-	outportb(0x60, 0xF4);	//enable data reporting
-
-	//outportb(0x64, 0xD4);
-	//outportb(0x60, 0xE7);	//scaling 2:1
-}
-
-
-
-void isr_mouse()
-{
-	byte inb = inportb(0x60);	//read mouse byte
-	//printf("InB: %x\n", inb);
-	//return;
-	if ((inb == 0xFA) && (mouse_bytesRead < 1))		//ACK
-		return;
-	mouse_inbuffer[mouse_bytesRead] = inb;
-	mouse_bytesRead++;
-	if (mouse_bytesRead == 3)	//complete packet received
-	{
-		mouse_bytesRead = 0;
-		int adjx = (char) mouse_inbuffer[1];
-		int adjy = (char) mouse_inbuffer[2];
-		mouse_x += adjx;
-		mouse_y -= adjy;						//-= because screen y coordinates are opposite mouse y coordinates
-		if (mouse_inbuffer[0] & 0x01)	//left button
-		{
-			video_pset(VXR/2+mouse_x, VYR/2+mouse_y, 0x00FFFFFF);
-			printf("X: %d, Y: %d\n", mouse_x, mouse_y);
-		}
-		else
-		{
-			video_pset(VXR/2+mouse_x, VYR/2+mouse_y, 0x00000000);
-			printf("X: %d, Y: %d\n", mouse_x, mouse_y);
-		}
-	}
-}
-
-
-
-
-

mouse.h

@@ -1,17 +0,0 @@
-// mouse.h
-// 10/03/03
-// Author: Josh Holtrop
-
-
-int mouse_x = 0;
-int mouse_y = 0;
-int mouse_bytesRead = 0;
-byte mouse_inbuffer[16];
-
-void mouse_init();
-void isr_mouse();
-
-
-
-
-

stage1.asm

@@ -1,228 +0,0 @@
-
-%include "bootdef.inc"
-
-[bits 16]
-
-org 0x7c00
-
-	jmp short start
-
-; --------------------------------------------------
-; data portion of the "DOS BOOT RECORD"
-; ----------------------------------------------------------------------
-brINT13Flag     DB      90H             ; 0002h - 0EH for INT13 AH=42 READ
-brOEM           DB      'MSDOS5.0'      ; 0003h - OEM ID - Windows 95B
-brBPS           DW      512             ; 000Bh - Bytes per sector
-brSPC           DB      1               ; 000Dh - Sector per cluster
-brSc_b4_fat	DW      1               ; 000Eh - Reserved sectors
-brFATs          DB      2               ; 0010h - FAT copies
-brRootEntries   DW      0E0H		; 0011h - Root directory entries
-brSectorCount   DW      2880		; 0013h - Sectors in volume, < 32MB
-brMedia         DB      240		; 0015h - Media descriptor
-brSPF           DW      9               ; 0016h - Sectors per FAT
-brSc_p_trk	DW      18              ; 0018h - Sectors per head/track
-brHPC           DW      2		; 001Ah - Heads per cylinder
-brSc_b4_prt	DD      0               ; 001Ch - Hidden sectors
-brSectors       DD      0	        ; 0020h - Total number of sectors
-brDrive		DB      0               ; 0024h - Physical drive no.
-		DB      0               ; 0025h - Reserved (FAT32)
-		DB      29H             ; 0026h - Extended boot record sig (FAT32)
-brSerialNum     DD      404418EAH       ; 0027h - Volume serial number
-brLabel         DB      'HOS 0.1.1  '   ; 002Bh - Volume label
-brFSID          DB      'FAT12   '      ; 0036h - File System ID
-;------------------------------------------------------------------------
-
-start:
-	jmp	0:jmphere		;ensure that cs=0 and ip=0x7c...
-jmphere:
-	;dl=drive number, save it!
-	xor	ax, ax
-	mov	ds, ax
-	mov	[brDrive], dl
-	cli
-	mov	ss, ax
-	mov	sp, 0x7Bfe		;right under boot sector
-	sti
-
-	mov	ax, 0xb800
-	mov	ds, ax
-	mov	es, ax
-
-	xor	di, di
-	mov	ax, 0x0700
-	mov	cx, 2000
-cls:
-	stosw
-	loop	cls
-
-enable_a20:
-	in	al, 0x64
-	test	al, 2
-	jnz	enable_a20
-	mov	al, 0xD1
-	out	0x64, al
-ea20_2:	in	al, 0x64
-	and	ax, byte 2
-	jnz	ea20_2
-	mov	al, 0xDF
-	out	0x60, al
-
-unreal:
-	xor	ax, ax
-	mov	es, ax
-	mov	ds, ax
-
-	lgdt	[gdtr]		;load gdt
-	cli
-	push	es
-	push	ds		;save segment values
-	mov	ebx, cr0
-	inc	bl
-	mov	cr0, ebx	;pmode!
-	mov	ax, KERNEL_DATA
-	mov	es, ax
-	mov	ds, ax		;load segment limits
-	dec	bl
-	mov	cr0, ebx	;back to real mode!
-	pop	ds
-	pop	es		;segments back, with 4gb limits!
-	sti
-
-;now lets read in the FAT and root directory so we can search for the kernel file...
-	mov	ax, 0x0209		;FAT1
-	mov	cx, 0x0002
-	xor	dh, dh
-	mov	dl, [brDrive]
-	mov	bx, BOOT_FAT_SEG
-	mov	es, bx
-	xor	bx, bx
-	int	0x13
-
-	mov	ax, 0x020E		;root directory
-	mov	cx, 0x0002		;cyl/sect
-	mov	dh, 0x01		;head
-	mov	dl, [brDrive]		;drive
-	mov	bx, BOOT_ROOT_SEG
-	mov	es, bx
-	xor	bx, bx
-	int	0x13
-
-;k now read root directory
-	mov	bx, BOOT_ROOT_SEG
-	mov	ds, bx
-	xor	si, si			;k now ds:si points to beginning of root directory
-	mov	es, si
-	mov	cx, 224			;max root entries
-loop_compare:
-	mov	di, stage2
-	push	cx
-	push	si			;save pointer to root dir entry
-	mov	cx, 11
-loop_name:
-	cmpsb
-	loopz	loop_name
-	jnz	goon			;cx didn't get to zero, bad file
-	pop	si
-	pop	cx
-	jmp	found_file		;good file, ds:si points to start of root directory entry
-goon:
-	pop	si
-	pop	cx
-	add	si, 32
-	loop	loop_compare
-
-error:
-	jmp	$			;halt! no kernel file found!
-
-found_file:				;ds:si points to root dir entry
-	xor	ax, ax
-	mov	gs, ax
-	mov	ax, BOOT_STAGE2_SEG
-	mov	es, ax
-
-	mov	ax, [ds:si+26]
-	mov	bx, BOOT_FAT_SEG
-	mov	ds, bx			;ds points to beginning of FAT
-	xor	di, di
-
-readstage2_loop:
-	cmp	ax, 0xff7
-	jg	readstage2_done
-	inc	di
-	push	ax
-	call	getCHSfromCluster
-	mov	ax, 0x0201
-	mov	dl, [gs:BOOT_DRIVE]
-	xor	bx, bx
-	int	0x13
-	mov	bx, es
-	add	bx, 0x0020
-	mov	es, bx
-	pop	ax			;current logical cluster #
-
-	mov	cx, ax			;cx=logical cluster
-	mov	dx, 3
-	mul	dx
-	shr	ax, 1			;ax=logical cluster * 3 / 2
-	mov	si, ax
-	test	cl, 1			;is bit0 set?
-	jnz	odd_cluster
-even_cluster:
-	lodsw
-	and	ax, 0x0fff
-	jmp	got_cluster
-odd_cluster:
-	lodsw
-	shr	ax, 4
-got_cluster:
-	jmp	readstage2_loop
-
-readstage2_done:
-
-	jmp	0:BOOT_STAGE2_ADD
-
-;------------------------------------------------------
-getCHSfromCluster:
-	;input: ax=lba of sector on floppy (0-2879)
-	add	ax, 31			;convert logical cluster# to lba#
-	xor	dx, dx			;lba->chs
-	mov	bx, 18
-	div	bx
-	inc	dx
-	mov	cl, dl			;sector# (1-18)
-	xor	dx, dx
-	mov	bx, 2
-	div	bx
-	mov	ch, al			;cylinder# (0-79)
-	mov	dh, dl			;head# (0-1)
-	ret
-
-
-;-------------------------------------------------------
-gdtr:
-	dw	gdt_end-gdt-1
-	dd	gdt
-gdt:
-	dd	0
-	dd	0
-
-KERNEL_DATA equ $-gdt
-	db	0xff		;segment 16 = 4gb data
-	db	0xff
-	db	0x00
-	db	0x00
-	db	0x00
-	db	0x92
-	db	0xcf		;cf
-	db	0x00
-
-gdt_end:
-
-
-
-stage2:	db	"STAGE2  BIN"
-
-times 510-($-$$)	db 0
-
-db	0x55, 0xaa
-

stage2.asm

@@ -1,920 +0,0 @@
-
-%include "bootdef.inc"
-
-%define VESA_MODEINFO_SEG 0x0120
-%define VESA_MODELIST_SEG 0x0140
-%define GOOD_MODELIST_SEG 0x0160
-
-[bits 16]
-
-org BOOT_STAGE2_ADD
-
-
-;k now read root directory
-	mov	bx, BOOT_ROOT_SEG
-	mov	ds, bx
-	xor	si, si			;k now ds:si points to beginning of root directory
-	mov	es, si
-	mov	cx, 224			;max root entries
-loop_compare:
-	mov	di, kernel
-	push	cx
-	push	si			;save pointer to root dir entry
-	mov	cx, 11
-loop_name:
-	cmpsb
-	loopz	loop_name
-	jnz	goon			;cx didn't get to zero, bad file
-	pop	si
-	pop	cx
-	jmp	found_file		;good file, ds:si points to start of root directory entry
-goon:
-	pop	si
-	pop	cx
-	loop	loop_compare
-
-error:
-	jmp	$			;halt! no kernel file found!
-
-found_file:				;ds:si points to root dir entry of kernel file
-	xor	ax, ax
-	mov	gs, ax
-	mov	ax, [ds:si+26]
-	mov	bx, BOOT_FAT_SEG
-	mov	ds, bx			;ds points to beginning of FAT
-	mov	edi, BOOT_KERNEL_ADD
-
-readkernel_loop:
-	cmp	ax, 0xff7
-	jg	readkernel_done
-	push	ax
-	call	getCHSfromCluster
-	mov	ax, 0x0201
-	mov	dl, [gs:BOOT_DRIVE]
-	mov	bx, BOOT_KERNEL_SEG
-	mov	es, bx
-	xor	bx, bx
-	int	0x13
-	mov	cx, 256
-	xor	ax, ax
-	mov	es, ax
-	mov	esi, BOOT_KERNEL_SEG*16
-copykernel_loop:
-	mov	ax, [es:esi]
-	mov	[es:edi], ax
-	inc	esi
-	inc	esi
-	inc	edi
-	inc	edi
-	loop	copykernel_loop
-
-	pop	ax			;current logical cluster #
-
-	mov	cx, ax			;cx=logical cluster
-	mov	dx, 3
-	mul	dx
-	shr	ax, 1			;ax=logical cluster * 3 / 2
-	mov	si, ax
-	test	cl, 1			;is bit0 set?
-	jnz	odd_cluster
-even_cluster:
-	lodsw
-	and	ax, 0x0fff
-	jmp	got_cluster
-odd_cluster:
-	lodsw
-	shr	ax, 4
-got_cluster:
-	jmp	readkernel_loop
-
-;------------------------------------------------------
-readkernel_done:			;-------------put more real mode init stuff here!
-					;----ask to load RD from floppy
-	mov	ax, 0xb800
-	mov	es, ax
-	xor	ax, ax
-	mov	ds, ax
-	xor	di, di
-	mov	cx, 2000
-	mov	ax, 0x0700
-cls_loop:
-	stosw
-	loop	cls_loop
-
-	mov	dx, 0x3d4		;move cursor off screen...
-	mov	al, 0x0e
-	out	dx, al
-	inc	dx
-	mov	al, 0xff
-	out	dx, al
-	dec	dx
-	mov	al, 0x0f
-	out	dx, al
-	inc	dx
-	out	dx, al
-
-	xor	di, di
-	mov	si, txt_welcome
-	mov	ah, 0x1f
-	call	puts
-
-	mov	di, 160
-	mov	si, txt_rd1
-	mov	ah, 7
-	call	puts
-
-	mov	si, txt_rd2
-	mov	di, 160*2
-	call	puts
-
-	mov	di, 160*3
-	mov	si, txt_input
-	call	puts
-
-get_rd:
-	xor	ax, ax
-	int	0x16
-	cmp	al, '1'
-	jz	got_rd
-	cmp	al, '2'
-	jnz	get_rd
-got_rd:	
-	stosb
-	sub	al, '1'
-	push	ds
-	mov	bx, BOOT_DATA_SEG		;segment for data to send kernel
-	mov	ds, bx
-	mov	[ds:BOOT_HASRD], al
-	pop	ds				;ds=0
-	cmp	al, 0				;dont load rd
-	jz	no_rd
-
-	mov	cx, 80
-	mov	edi, 0xb8000+160*4
-filler_loop:
-	mov	word [ds:edi], 0x0400+177
-	inc	edi
-	inc	edi
-	loop	filler_loop
-	mov	cx, 80				;80 cylinders to read
-	xor	si, si
-	mov	edi, BOOT_RD_ADD		;ram disk address
-read_cylinder:
-	push	cx
-	mov	bx, 0x0100
-	mov	es, bx
-	xor	bx, bx
-	mov	ax, 0x0224
-	mov	cx, si
-	mov	ch, cl
-	mov	cl, 1
-	xor	dx, dx
-	mov	dl, [gs:BOOT_DRIVE]
-	int	0x13
-
-	mov	ebx, 0xb8000
-	add	bx, si
-	shl	bl, 1
-	mov	word [ds:ebx+160*4], 0x0200+219
-
-	push	si
-	mov	esi, 0x1000
-	mov	cx, 0x2400
-copydisk_loop:
-	mov	ax, [ds:esi]
-	inc	esi
-	inc	esi
-	mov	[ds:edi], ax
-	inc	edi
-	inc	edi
-	loop	copydisk_loop
-
-	pop	si				;what cylinder# we are on...
-	inc	si
-	pop	cx
-	loop	read_cylinder
-
-;------------------------------------------------------
-no_rd:
-	mov	ax, BOOT_DATA_SEG
-	mov	es, ax
-	mov	di, BOOT_MEMMAP			;store memmap info in es:di for kernel
-	xor	edx, edx
-	mov	ax, 0x0100
-	mov	ds, ax
-	xor	ebx, ebx
-getmemmap_loop:
-	push	es
-	push	di
-	push	edx
-	mov	ax, 0x0100			;get memory map
-	mov	es, ax
-	xor	di, di
-	mov	eax, 0x0000E820
-	mov	ecx, 0x00000014
-	;mov	ebx, 0x00000000
-	mov	edx, 0x534D4150			;'SMAP'
-	int	0x15
-	jc	getmemmap_carry
-	cmp	eax, 0x534D4150			;eax should be 'SMAP' on return...
-	jnz	getmemmap_error
-	cmp	ebx, 0
-	jz	getmemmap_done
-
-	pop	edx				;now, copy memmap entry to es:di on the stack
-	pop	di
-	pop	es
-	xor	si, si
-	mov	cx, 20
-getmemmap_copymem_loop:
-	lodsb
-	stosb
-	loop	getmemmap_copymem_loop
-	inc	edx
-	jmp	getmemmap_loop
-
-getmemmap_error:
-	mov	ax, 0xb800
-	mov	es, ax
-	mov	di, 160*24
-	xor	ax, ax
-	mov	ds, ax
-	mov	si, txt_memerror
-	mov	ah, 0x04
-	call	puts
-	hlt
-	jmp	$
-
-getmemmap_carry:
-	dec	edx
-getmemmap_done:
-	pop	edx
-	pop	di
-	pop	es
-
-	xor	si, si
-	mov	cx, 20
-getmemmap_done_copymem_loop:
-	lodsb
-	stosb
-	loop	getmemmap_done_copymem_loop
-	inc	edx
-
-	mov	di, BOOT_MEMENTRIES
-	mov	[es:di], edx			;save # of memmap entries for kernel
-
-						;on to vesa info...
-	xor	ax, ax
-	mov	gs, ax
-	mov	ds, ax
-	mov	ax, 0xb800
-	mov	es, ax
-	mov	di, 160
-	mov	cx, 2000-80
-	mov	ax, 0x0700
-cls_vesa_loop:
-	stosw
-	loop	cls_vesa_loop
-	mov	si, txt_vesa
-	mov	di, 160*1
-	mov	ah, 7
-	call	puts
-
-	push	di
-	mov	ax, 0x0100
-	mov	es, ax
-	xor	di, di
-	mov	dword [es:di], "2EBV"
-	mov	ax, 0x4F00
-
-	int	0x10
-	pop	di
-	cmp	ax, 0x004F
-	jz	vesa_good
-	mov	si, txt_novesa
-	mov	ax, 0xb800
-	mov	es, ax
-	mov	ah, 7
-	call	puts
-	mov	ax, BOOT_DATA_SEG
-	mov	ds, ax
-	mov	word [ds:BOOT_VESA], 0
-	jmp	vesa_done
-vesa_good:
-	mov	ax, 0xb800
-	mov	es, ax
-	mov	ax, 0x0100
-	mov	ds, ax
-	xor	si, si
-	mov	bx, [4]
-	mov	al, bh
-	call	puthex
-	mov	al, '.'
-	stosb
-	mov	al, 7
-	stosb
-	mov	al, bl
-	call	puthex
-	add	di, 4
-	cmp	bh, 2
-	jge	vesa_good2
-	xor	ax, ax
-	mov	ds, ax
-	mov	si, txt_vesaold
-	mov	ah, 7
-	call	puts
-	mov	ax, BOOT_DATA_SEG
-	mov	ds, ax
-	mov	word [ds:BOOT_VESA], 0
-	jmp	vesa_done
-vesa_good2:
-	mov	ebx, [6]			;something like 0x00000E60
-	mov	edx, [14]
-	mov	si, bx
-	shr	ebx, 16
-	mov	ds, bx				;ds:si points to null-terminated OEM identification string
-	mov	ah, 2
-	push	si
-	call	puts
-	pop	si
-	mov	ax, BOOT_DATA_SEG
-	mov	es, ax
-	mov	di, BOOT_VESA_OEM
-vesa_copyoem:
-	lodsb
-	stosb
-	or	al, al
-	jnz	vesa_copyoem
-	mov	ax, 0x0100
-	mov	ds, ax
-	xor	si, si
-	mov	di, BOOT_VESA_VBE
-	mov	cx, 512
-vesa_copyvbe:
-	lodsb
-	stosb
-	loop	vesa_copyvbe
-
-	mov	si, dx
-	shr	edx, 16
-	mov	ds, dx				;ds:si points to video mode list
-	mov	ax, VESA_MODELIST_SEG
-	mov	es, ax
-	xor	di, di
-vesa_copymodes:
-	lodsw
-	stosw
-	cmp	ax, 0xffff
-	jnz	vesa_copymodes
-
-	mov	ax, GOOD_MODELIST_SEG
-	mov	es, ax
-	xor	di, di
-	mov	cx, 256
-	mov	ax, 0xffff
-clear_good_mode_list_loop:
-	stosw
-	loop	clear_good_mode_list_loop
-
-	mov	ax, VESA_MODELIST_SEG
-	mov	ds, ax
-	xor	si, si				;ds:si points to video mode list where we can edit it :)
-	mov	ax, GOOD_MODELIST_SEG
-	mov	es, ax
-	xor	di, di
-	xor	dx, dx				;dx=what good mode # we are on
-vesa_readmodeinfo_loop:
-	lodsw
-	cmp	ax, 0xffff
-	jz	vesa_endofmodes
-	push	ax				;save mode#
-	call	checkmode
-	cmp	ax, 0
-	jz	vesa_readmodeinfo_good
-	pop	ax
-	jmp	vesa_readmodeinfo_loop
-vesa_readmodeinfo_good:
-	pop	ax				;restore mode#
-	stosw
-	call	vesa_showmodeinfo
-	inc	dx
-	jmp	vesa_readmodeinfo_loop
-
-vesa_endofmodes:				;here we have a list of good modes at GOOD_MODELIST_SEG:0
-	xor	ax, ax
-	mov	ds, ax
-	mov	si, txt_consolemode
-	mov	ax, 0xb800
-	mov	es, ax
-	mov	di, 160*2
-	mov	ah, 7
-	call	puts
-	mov	di, 160*3
-	mov	cx, dx
-	mov	al, 'b'
-vesa_displaylabels:
-	stosb
-	push	ax
-	mov	al, 7
-	stosb
-	mov	al, '.'
-	stosb
-	mov	al, 7
-	stosb
-	pop	ax
-	inc	al
-	add	di, 160-4
-	loop	vesa_displaylabels		;done drawing screen of VESA choices, now ask for one
-						;valid options are 'a' through (al-1)
-	mov	bl, al
-	xor	ax, ax
-	mov	ds, ax
-	mov	di, 160*24
-	mov	si, txt_input
-	mov	ah, 14
-	call	puts
-vesa_getchoice:
-	xor	ax, ax
-	int	0x16
-	cmp	al, 'a'
-	jl	vesa_getchoice
-	cmp	al, bl
-	jge	vesa_getchoice
-	stosb
-	push	ax
-	mov	al, 14
-	stosb
-	pop	ax
-	xor	ah, ah
-	sub	ax, 'a'
-	cmp	ax, 0
-	jz	vesa_consolemode_only
-	mov	cx, ax				;cx holds good mode# (1=first good vesa mode)
-	dec	cx
-	mov	ax, GOOD_MODELIST_SEG
-	mov	ds, ax
-	shl	cx, 1
-	mov	si, cx				;ds:si points to word containing selected mode#
-	lodsw
-	mov	cx, ax
-	mov	dx, ax				;cx and dx hold mode#
-
-	mov	ax, VESA_MODEINFO_SEG
-	mov	es, ax
-	xor	di, di
-	mov	ax, 0x4F01
-	int	0x10
-	call	checkvesa
-
-	mov	ax, VESA_MODEINFO_SEG
-	mov	ds, ax
-	xor	si, si
-	mov	ax, BOOT_DATA_SEG
-	mov	es, ax
-	mov	di, BOOT_VESA_INFO
-	mov	cx, 256
-vesa_copymodeinfo_loop:
-	lodsb
-	stosb
-	loop	vesa_copymodeinfo_loop		;store ModeInfoBlock for current
-
-	mov	[es:BOOT_VESA], dx		;store mode# for kernel
-
-;	mov	ax, 0xb800
-;	mov	es, ax
-;	xor	di, di
-;	mov	al, dh
-;	call	puthex2
-;	mov	al, dl
-;	call	puthex2
-
-	mov	bx, dx
-	or	bx, 0x4000			;set "use LFB" bit of mode#
-	mov	ax, 0x4F02
-	int	0x10				;switch to graphics mode!!!
-	call	checkvesa
-
-	jmp	vesa_done
-
-vesa_consolemode_only:
-	mov	ax, BOOT_DATA_SEG
-	mov	es, ax
-	mov	word [es:BOOT_VESA], 0
-
-	jmp	vesa_done
-
-;------------------------------------------------------
-vesa_showmodeinfo:
-	pusha
-	push	es
-	push	ds
-	mov	ax, VESA_MODEINFO_SEG
-	mov	ds, ax
-	xor	si, si
-	mov	ax, 0xb800
-	mov	es, ax
-
-	mov	cx, dx
-
-	mov	ax, 160
-	mul	dx				;ax=160*mod#
-	add	ax, 160*3+6			;offset first line of modes and room on left for label
-	mov	di, ax
-
-	mov	ax, [ds:18]
-	call	console_putDec
-	add	di, 10
-	mov	al, 'x'
-	call	console_putChar
-	inc	di
-	inc	di
-	mov	ax, [ds:20]
-	call	console_putDec
-	add	di, 10
-	mov	al, 'x'
-	call	console_putChar
-	inc	di
-	inc	di
-	xor	ah, ah
-	mov	al, [ds:25]
-	call	console_putDec
-	add	di, 8
-	mov	al, [ds:0]
-	test	al, 0x80
-	jz	vesa_showmodeinfo_done
-	mov	al, 'L'
-	call	console_putChar
-	mov	al, 'F'
-	call	console_putChar
-	mov	al, 'B'
-	call	console_putChar
-	inc	di
-	inc	di
-	mov	ebx, [ds:40]
-	mov	eax, ebx
-	shr	eax, 24
-	call	puthex2
-	mov	eax, ebx
-	shr	eax, 16
-	call	puthex2
-	mov	al, bh
-	call	puthex2
-	mov	al, bl
-	call	puthex2
-vesa_showmodeinfo_done:
-	pop	ds
-	pop	es
-	popa
-	ret
-
-;------------------------------------------------------
-checkmode:
-	push	bx
-	push	cx
-	push	dx
-	push	es
-	push	ds
-	push	di
-	push	si
-	mov	cx, ax				;cx=modenumber
-	mov	ax, VESA_MODEINFO_SEG
-	mov	es, ax
-	xor	di, di
-	mov	ax, 0x4F01
-	int	0x10
-	call	checkvesa
-	xor	di, di				;es:di -> ModeInfoBlock struc
-	mov	ax, [es:di]			;ModeAttributes
-	test	al, 1				;mode supported
-	jz	vesa_modenogood
-	test	al, 8				;color mode
-	jz	vesa_modenogood
-	test	al, 0x10			;graphics mode
-	jz	vesa_modenogood
-	test	al, 0x80			;Linear Frame Buffer supported
-	jz	vesa_modenogood
-	mov	al, [es:di+25]			;BitsPerPixel
-	cmp	al, 16
-	jz	vesa_bppok
-	cmp	al, 24
-	jz	vesa_bppok
-	cmp	al, 32
-	jnz	vesa_modenogood
-vesa_bppok:
-	mov	ax, [es:di+18]			;XResolution
-	mov	bx, [es:di+20]			;YResolution
-	cmp	ax, 640				;640x480
-	jnz	res_goon1
-	cmp	bx, 480
-	jnz	vesa_modenogood
-	jmp	vesa_modegood
-res_goon1:
-	cmp	ax, 800
-	jnz	res_goon2
-	cmp	bx, 600
-	jnz	vesa_modenogood
-	jmp	vesa_modegood
-res_goon2:
-	cmp	ax, 1024
-	jnz	res_goon3
-	cmp	bx, 768
-	jnz	vesa_modenogood
-	jmp	vesa_modegood
-res_goon3:
-	cmp	ax, 1280
-	jnz	res_goon4
-	cmp	bx, 1024
-	jz	vesa_modegood
-	cmp	bx, 960
-	jz	vesa_modegood
-	jmp	vesa_modenogood
-res_goon4:
-	cmp	ax, 1600
-	jnz	vesa_modenogood
-	cmp	bx, 1200
-	jnz	vesa_modenogood
-vesa_modegood:
-	pop	si
-	pop	di
-	pop	ds
-	pop	es
-	pop	dx
-	pop	cx
-	pop	bx
-	xor	ax, ax
-	ret
-vesa_modenogood:
-	pop	si
-	pop	di
-	pop	ds
-	pop	es
-	pop	dx
-	pop	cx
-	pop	bx
-	mov	ax, 0xffff
-	ret
-
-;------------------------------------------------------
-vesa_done:
-
-;	xor	ax, ax				;wait for keypress...
-;	int	0x16
-
-	jmp	go_pm
-
-;------------------------------------------------------
-puts:
-	lodsb
-	or	al, al
-	jz	puts_done
-	stosb
-	mov	al, ah
-	stosb
-	jmp	puts
-puts_done:
-	ret
-
-;------------------------------------------------------
-checkvesa:
-	cmp	ax, 0x004F
-	jnz	vesaerror
-	ret
-vesaerror:
-	mov	ax, 0xb800
-	mov	es, ax
-	xor	ax, ax
-	mov	ds, ax
-	mov	si, txt_vesaerror
-	mov	di, 160*24
-	mov	ah, 4
-	call	puts
-	cli
-	hlt
-
-;-------Function console_putDec
-;input:
-; AX = number to display
-;output:
-; number written in decimal to es:di
-console_putDec:
-	pusha
-	xor	dx, dx
-	xor	bh, bh			;no characters written yet
-	mov	cx, 10000
-	div	cx			;ax=quotiont, dx=remainder
-	add	ax, '0'
-	cmp	ax, '0'
-	je	.goon1
-	call	console_putChar
-	mov	bh, 1
-
-.goon1:
-	mov	ax, dx			;load remainder to ax
-	xor	dx, dx
-	mov	cx, 1000
-	div	cx			;ax=quotiont, dx=remainder
-	add	ax, '0'
-	cmp	ax, '0'
-	je	.goon11
-	call	console_putChar
-	mov	bh, 1
-	jmp	.goon2
-.goon11:
-	cmp	bh, 0
-	je	.goon2
-	call	console_putChar
-
-.goon2:
-	mov	ax, dx			;load remainder to ax
-	xor	dx, dx
-	mov	cx, 100
-	div	cx			;ax=quotiont, dx=remainder
-	add	ax, '0'
-	cmp	ax, '0'
-	je	.goon21
-	call	console_putChar
-	mov	bh, 1
-	jmp	.goon3
-.goon21:
-	cmp	bh, 0
-	je	.goon3
-	call	console_putChar
-
-.goon3:
-	mov	ax, dx			;load remainder to ax
-	xor	dx, dx
-	mov	cx, 10
-	div	cx			;ax=quotiont, dx=remainder
-	add	ax, '0'
-	cmp	ax, '0'
-	je	.goon31
-	call	console_putChar
-	mov	bh, 1
-	jmp	.goon4
-.goon31:
-	cmp	bh, 0
-	je	.goon4
-	call	console_putChar
-.goon4:					;here dx contains last remainder
-	mov	ax, dx
-	add	ax, '0'
-	call	console_putChar
-
-	popa
-	ret
-
-;------------------------------------------------------
-console_putChar:
-	stosb
-	mov	al, 7
-	stosb
-	ret
-
-;------------------------------------------------------
-puthex:
-	;es:di points to video memory
-	;al holds hex value
-
-	push	ax
-	mov	ah, al
-	shr	ax, 4
-	and	al, 0x0F
-	add	al, '0'
-	cmp	al, '9'
-	jle	puthex_goon1
-	add	al, 'A'-'9'-1
-puthex_goon1:
-	cmp	al, '0'
-	jz	puthex_skipzero
-	stosb
-	mov	al, 7
-	stosb
-puthex_skipzero:
-	pop	ax
-	push	ax
-	and	al, 0x0F
-	add	al, '0'
-	cmp	al, '9'
-	jle	puthex_goon2
-	add	al, 'A'-'9'-1
-puthex_goon2:
-	stosb
-	mov	al, 7
-	stosb
-	pop	ax
-	ret
-
-;------------------------------------------------------
-puthex2:
-	;es:di points to video memory, always displays 2 characters!
-	;al holds hex value
-
-	push	ax
-	mov	ah, al
-	shr	ax, 4
-	and	al, 0x0F
-	add	al, '0'
-	cmp	al, '9'
-	jle	puthex2_goon1
-	add	al, 'A'-'9'-1
-puthex2_goon1:
-	stosb
-	mov	al, 7
-	stosb
-	pop	ax
-	push	ax
-	and	al, 0x0F
-	add	al, '0'
-	cmp	al, '9'
-	jle	puthex2_goon2
-	add	al, 'A'-'9'-1
-puthex2_goon2:
-	stosb
-	mov	al, 7
-	stosb
-	pop	ax
-	ret
-
-;------------------------------------------------------
-txt_welcome: db	"                             Welcome to HOS v", VERSION, "!                             ", 0
-txt_rd1: db	"1. Do not load an initial ram disk", 0
-txt_rd2: db	"2. Load initial ram disk from floppy", 0
-txt_input: db	"Enter your selection: ", 0
-txt_vesa: db	"VESA version: ", 0
-txt_vesaerror: db "VESA function call error! Halting system!", 0
-txt_novesa: db	"VESA not found. Starting in console mode...", 0
-txt_vesaold: db	"VESA version 2.0 required. Starting in console mode...", 0
-txt_consolemode: db "a. Console mode only.", 0
-txt_memerror: db "Extended Memory Map information unavailable! Halting system...", 0
-
-;------------------------------------------------------
-getCHSfromCluster:
-	;input: ax=lba of sector on floppy (0-2879)
-	add	ax, 31			;convert logical cluster# to lba#
-	xor	dx, dx			;lba->chs
-	mov	bx, 18
-	div	bx
-	inc	dx
-	mov	cl, dl			;sector# (1-18)
-	xor	dx, dx
-	mov	bx, 2
-	div	bx
-	mov	ch, al			;cylinder# (0-79)
-	mov	dh, dl			;head# (0-1)
-	ret
-
-
-;-------------------------------------------------------
-gdtr:
-	dw	gdt_end-gdt-1
-	dd	gdt
-gdt:
-	dd	0
-	dd	0
-
-KERNEL_CODE equ $-gdt
-	db	0xff		;limit	7:0
-	db	0xff		;limit	15:8
-	db	0x00		;base	7:0
-	db	0x00		;base	15:8
-	db	0x00		;base	23:16
-	db	0x9a		;access
-	db	0xcf		;flags / limit 19:16
-	db	0x00		;base	31:24
-
-KERNEL_DATA equ $-gdt
-	db	0xff		;segment 16 = 4gb data
-	db	0xff
-	db	0x00
-	db	0x00
-	db	0x00
-	db	0x92
-	db	0xcf		;cf
-	db	0x00
-
-gdt_end:
-
-;------------------------------------------------------
-go_pm:
-	xor	ax, ax
-	mov	ds, ax
-	lgdt	[gdtr]
-	cli
-	mov	eax, cr0
-	inc	eax
-	mov	cr0, eax
-
-	jmp	KERNEL_CODE:pmode
-
-bits 32
-pmode:
-	mov	ax, KERNEL_DATA
-	mov	es, ax
-	mov	ds, ax
-	mov	fs, ax
-	mov	gs, ax
-	jmp	KERNEL_CODE:BOOT_KERNEL_ADD
-
-kernel:	db	"KERNEL  BIN", 0
-
-

tetris.c

@@ -1,7 +0,0 @@
-
-// tetris.x
-// Author: Josh Holtrop
-// Date: 09/30/03
-
-
-

video.c

@@ -1,147 +0,0 @@
-//video.c
-// 08/13/03 Josh Holtrop
-
-
-void video_init(ModeInfoBlock *mib)
-{
-	video_mode = *mib;
-
-	switch(video_mode.BitsPerPixel)
-	{
-	case 16:
-		vid_ptr16 = (word *) video_mode.PhysBasePtr;
-		break;
-	case 24:
-		vid_ptr24 = (byte *) video_mode.PhysBasePtr;
-		break;
-	case 32:
-		vid_ptr32 = (dword *) video_mode.PhysBasePtr;
-	}
-
-	dword tot = ((video_mode.XResolution) * (video_mode.YResolution));
-	int a;
-	for (a = 0; a < tot; a++)
-	{
-		if (a < (tot / 4))
-			video_psetp(a, 0x00FF0000);
-				else if (a < (tot / 2))
-			video_psetp(a, 0x0000FF00);
-		else if (a < ((tot * 3) / 4))
-			video_psetp(a, 0x000000FF);
-		else
-			video_psetp(a, 0x00FFFFFF);		
-	}
-}
-
-void video_horiz(int y, int x1, int x2, dword color)
-{
-	checkBoundsy(y);
-	checkBoundsx(x1);
-	checkBoundsx(x2);
-	if (x1 > x2)
-	{
-		int tmp = x2;
-		x2 = x1;
-		x1 = tmp;
-	}
-	int pixel = y*video_mode.XResolution+x1;
-	int a;
-	for (a = 0; a <= (x2-x1); a++)
-	{
-		video_psetp(pixel, color);
-		pixel++;
-	}
-}
-
-void video_vert(int x, int y1, int y2, dword color)
-{
-	checkBoundsx(x);
-	checkBoundsy(y1);
-	checkBoundsy(y2);
-	if (y1 > y2)
-	{
-		int tmp = y2;
-		y2 = y1;
-		y1 = tmp;
-	}
-	int pixel = y1*video_mode.XResolution+x;
-	int a;
-	for (a = 0; a <= (y2-y1); a++)
-	{
-		video_psetp(pixel, color);
-		pixel+=video_mode.XResolution;
-	}
-}
-
-void video_rect(int x1, int y1, int x2, int y2, dword color)
-{
-	checkBoundsx(x1);
-	checkBoundsx(x2);
-	checkBoundsy(y1);
-	checkBoundsy(y2);
-	if (x2 < x1)
-	{
-		int tmp = x2;
-		x2 = x1;
-		x1 = tmp;
-	}
-	if (y2 < y1)
-	{
-		int tmp = y2;
-		y2 = y1;
-		y1 = tmp;
-	}
-	video_horiz(y1, x1, x2, color);
-	video_horiz(y2, x1, x2, color);
-	video_vert(x1, y1, y2, color);
-	video_vert(x2, y1, y2, color);
-}
-
-void video_rectf(int x1, int y1, int x2, int y2, dword color)
-{
-	checkBoundsx(x1);
-	checkBoundsx(x2);
-	checkBoundsy(y1);
-	checkBoundsy(y2);
-	if (x2 < x1)
-	{
-		int tmp = x2;
-		x2 = x1;
-		x1 = tmp;
-	}
-	if (y2 < y1)
-	{
-		int tmp = y2;
-		y2 = y1;
-		y1 = tmp;
-	}
-	int a;
-	for (a = 0; a <= (y2-y1); a++)
-		video_horiz(y1+a, x1, x2, color);
-}
-
-inline void video_pset(int x, int y, dword color)
-{
-	video_psetp(y*video_mode.XResolution+x, color);
-}
-
-void video_psetp(int pixel, dword color)
-{
-	switch(video_mode.BitsPerPixel)
-	{
-	case 16:
-		vid_ptr16[pixel] = ((color&0xFF)>>3) | ((((color>>8)&0xFF)>>2)<<5) | ((((color>>16)&0xFF)>>3)<<11);
-		//vid_ptr16[pixel] = ((color&0xFF)>>3) | ((((color>>8)&0xFF)>>3)<<5) | ((((color>>16)&0xFF)>>3)<<10);
-		break;
-	case 24:
-		vid_ptr24[pixel*3] = color & 0xFF;
-		vid_ptr24[pixel*3+1] = (color>>8) & 0xFF;
-		vid_ptr24[pixel*3+2] = (color>>16) & 0xFF;
-		break;
-	case 32:
-		vid_ptr32[pixel] = color;
-	}
-}
-
-
-

video.h

@@ -1,66 +0,0 @@
-//video.h
-// 08/18/03 Josh Holtrop
-
-
-void video_init();
-void video_horiz(int y, int x1, int x2, dword color);
-void video_vert(int x, int y1, int y2, dword color);
-void video_rect(int x1, int y1, int x2, int y2, dword color);
-void video_rectf(int x1, int y1, int x2, int y2, dword color);
-inline void video_pset(int x, int y, dword color);
-void video_psetp(int pixel, dword color);
-
-
-#define checkBoundsx(x) (x<0 ? x=0 : (x>=video_mode.XResolution ? x=video_mode.XResolution-1 : 0))
-#define checkBoundsy(x) (x<0 ? x=0 : (x>=video_mode.YResolution ? x=video_mode.YResolution-1 : 0))
-
-typedef struct{
-	word	ModeAttributes;
-	byte	WinAAttributes;
-	byte	WinBAttributes;
-	word	WinGranularity;
-	word	WinSize;
-	word	WinASegment;
-	word	WinBSegment;
-	dword	WinFuncPtr;
-	word	BytesPerScanLine;
-
-	word	XResolution;
-	word	YResolution;
-	byte	XCharSize;
-	byte	YCharSize;
-	byte	NumberOfPlanes;
-	byte	BitsPerPixel;
-	byte	NumberOfBanks;
-	byte	MemoryModel;
-	byte	BankSize;
-	byte	NumberOfImagePages;
-	byte	Reserved1;
-
-	byte	RedMaskSize;
-	byte	RedFieldPosition;
-	byte	GreenMaskSize;
-	byte	GreenFieldPosition;
-	byte	BlueMaskSize;
-	byte	BlueFieldPosition;
-	byte	RsvdMaskSize;
-	byte	RsvdFieldPosition;
-	byte	DirectColorModeInfo;
-
-	dword	PhysBasePtr;
-	dword	OffScreenMemOffset;
-	word	OffScreenMemSize;
-	byte	Reserved[206];
-} ModeInfoBlock;
-
-ModeInfoBlock	video_mode;
-byte	*vid_ptr24;
-word	*vid_ptr16;
-dword	*vid_ptr32;
-
-
-
-
-
-
-

vmm.c

@@ -1,27 +0,0 @@
-
-// vmm.c
-// Author: Josh Holtrop
-// Date: 09/30/03
-
-
-void	*malloc(dword bytes)
-{
-
-
-}
-
-
-
-int	free(void *ptr);
-{
-
-
-
-
-}
-
-
-
-
-
-

vmm.h

@@ -1,13 +0,0 @@
-
-// vmm.h
-// Author: Josh Holtrop
-// Date: 09/30/03
-
-
-void   *malloc(dword bytes);
-int	free(void *ptr);
-
-
-
-
-