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Import backup from 2003-11-12

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Josh Holtrop 2003-11-12 22:00:00 -05:00
parent 294b4b0e27
commit 70d6bb1eb3
8 changed files with 138 additions and 11 deletions
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86
asmfuncs.asm
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@ -2,13 +2,10 @@
; Josh Holtrop
; 10/23/03
[global _write_cr0]
[global _read_cr0]
[global _write_cr3]
[global _read_cr3]
;stores the parameter to the CR0 register
;extern dword write_cr0(dword cr0);
[global _write_cr0]
_write_cr0:
push ebp
mov ebp, esp
@ -19,12 +16,14 @@ _write_cr0:
;returns the value in the CR0 register
;extern dword read_cr0();
[global _read_cr0]
_read_cr0:
mov eax, cr0;
ret
;stores the parameter to the CR3 register
;extern dword write_cr3(dword cr3);
[global _write_cr3]
_write_cr3:
push ebp
mov ebp, esp
@ -35,11 +34,90 @@ _write_cr3:
;returns the value in the CR3 register
;extern dword read_cr3();
[global _read_cr3]
_read_cr3:
mov eax, cr3;
ret
;copies 32bpp video buffer memory to LFB
;extern dword video_copyBuffer32(dword src, dword dest, dword pixelcount);
[global _video_copyBuffer32]
_video_copyBuffer32:
push ebp
mov ebp, esp
push esi
push edi
push ecx
mov esi, [ebp+8]
mov edi, [ebp+12]
mov ecx, [ebp+16]
rep movsd
pop ecx
pop edi
pop esi
pop ebp
ret
;copies 24bpp video buffer memory to LFB
;extern dword video_copyBuffer24(dword src, dword dest, dword pixelcount);
[global _video_copyBuffer24]
_video_copyBuffer24:
push ebp
mov ebp, esp
push esi
push edi
push ecx
mov esi, [ebp+8]
mov edi, [ebp+12]
mov ecx, [ebp+16]
_video_copyBuffer24_loop:
movsd
dec edi
loop _video_copyBuffer24_loop
pop ecx
pop edi
pop esi
pop ebp
ret
;copies 16bpp video buffer memory to LFB
;extern dword video_copyBuffer16(dword src, dword dest, dword pixelcount);
[global _video_copyBuffer16]
_video_copyBuffer16:
push ebp
mov ebp, esp
push esi
push edi
push ecx
push ebx
mov esi, [ebp+8]
mov edi, [ebp+12]
mov ecx, [ebp+16]
_video_copyBuffer16_loop:
lodsd ;eax = 32bpp color
shr eax, 3
mov ebx, eax
and ebx, 0x1F
shr eax, 2
and eax, 0xFFFFFFE0
or ebx, eax
and ebx, 0x7FF
shr eax, 3
and eax, 0xF800
or ebx, eax
mov eax, ebx
stosw ;store ax
loop _video_copyBuffer16_loop
pop ebx
pop ecx
pop edi
pop esi
pop ebp
ret

6
kernel.c
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@ -1,8 +1,8 @@
//kernel.c
//08/13/03 Josh Holtrop
//Holtrop's Operating System
//Version: 0.1.2
//Modified: 10/30/03
//Version: 0.12
//Modified: 11/12/03
#include "k_defines.h" //#DEFINE's for kernel
@ -55,7 +55,7 @@ void k_init()
enable_ints();
kbd_resetLEDs(); //after enabling interrupts!!
printf("HOS 0.1.2 - Kernel Size: %d kb\n", kernel_size()/1024);
printf("HOS 0.12 - Kernel Size: %d kb\n", kernel_size()/1024);
printf("Memory available to OS: %d MB (Bytes: %d)\n", mm_totalmem/0x100000, mm_totalmem);
printf("Freem memory: %d bytes\n", mm_freemem());

1
lib/compa.bat
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@ -1 +1,2 @@
nasmw -f aout -l io.lst io.asm -o io_a.o
nasmw -f aout -l misc.lst misc.asm -o misc.o

25
lib/misc.asm Normal file
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@ -0,0 +1,25 @@
;void memcpy(dword src, dword dest, dword length)
[global _memcpy]
_memcpy:
push ebp
mov ebp, esp
push esi
push edi
push ecx
mov esi, [ebp+8]
mov edi, [ebp+12]
mov ecx, [ebp+14]
rep movsb
pop ecx
pop edi
pop esi
pop ebp
ret

8
lib/misc.h Normal file
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@ -0,0 +1,8 @@
#ifndef __HMISC_H__
#define __HMISC_H__ __HMISC_H__
void memcpy(dword src, dword dest, dword length);
#endif

2
stage1.asm
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@ -28,7 +28,7 @@ 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
brLabel DB 'Holtrops OS' ; 002Bh - Volume label
brFSID DB 'FAT12 ' ; 0036h - File System ID
;------------------------------------------------------------------------

18
video.c
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@ -31,7 +31,7 @@ void video_init(ModeInfoBlock *mib)
int VXR = video_mode.XResolution;
int VYR = video_mode.YResolution;
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);
@ -141,7 +141,19 @@ inline void video_pset(int x, int y, dword color)
//Copies double-buffer to VESA Linear Frame Buffer
void video_copyBuffer()
{
int pixel;
switch (video_mode.BitsPerPixel)
{
case 32:
video_copyBuffer32((dword)vid_Buffer, video_mode.PhysBasePtr, video_mode.XResolution*video_mode.YResolution);
break;
case 24:
video_copyBuffer24((dword)vid_Buffer, video_mode.PhysBasePtr, video_mode.XResolution*video_mode.YResolution);
break;
case 16:
video_copyBuffer16((dword)vid_Buffer, video_mode.PhysBasePtr, video_mode.XResolution*video_mode.YResolution);
break;
}
/*int pixel;
dword color;
for (pixel = 0; pixel < video_mode.XResolution*video_mode.YResolution; pixel++)
{
@ -162,7 +174,7 @@ void video_copyBuffer()
color = vid_Buffer[pixel];
((dword *)video_mode.PhysBasePtr)[pixel] = color;
}
}
} */
}

3
video.h
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@ -11,6 +11,9 @@ inline void video_pset(int x, int y, dword color);
void video_psetp(int pixel, dword color);
void video_copyBuffer();
extern dword video_copyBuffer16(dword src, dword dest, dword pixelcount);
extern dword video_copyBuffer24(dword src, dword dest, dword pixelcount);
extern dword video_copyBuffer32(dword src, dword dest, dword pixelcount);
typedef struct{
word ModeAttributes;