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Import backup from 2003-08-05

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Josh Holtrop 2003-08-05 22:00:00 -04:00
parent e6805ee94c
commit 2ada7fd5df
1 changed files with 19 additions and 14 deletions
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33
bootsect.asm
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@ -141,11 +141,12 @@ found_file: ;ds:si points to root dir entry of kernel file
mov bx, FAT_SEG mov bx, FAT_SEG
mov ds, bx ;ds points to beginning of FAT mov ds, bx ;ds points to beginning of FAT
xor bx, bx xor bx, bx
xor di, di
readkernel_loop: readkernel_loop:
cmp ax, 0xff7 cmp ax, 0xff7
jg readkernel_done jg readkernel_done
;inc word [k_count] inc di
push ax push ax
push bx push bx
call getCHSfromCluster call getCHSfromCluster
@ -183,20 +184,24 @@ got_cluster:
jmp readkernel_loop jmp readkernel_loop
readkernel_done: ;now copy kernel to final location in KERNEL_ADD! readkernel_done: ;now copy kernel to final location in KERNEL_ADD!
xor ecx, ecx
mov cx, di ;cx=# of 512byte sectors loaded
shl ecx, 9 ;ecx=ecx*512
; mov ax, KERNEL_SEG mov ax, KERNEL_SEG
; mov ds, ax mov ds, ax
; xor esi, esi xor esi, esi
; xor ax, ax xor ax, ax
; mov es, ax mov es, ax
; mov edi, KERNEL_ADD mov edi, KERNEL_ADD
; xor ecx, ecx movekernel_loop:
; mov cx, [k_count] ;cx=# of 512byte sectors loaded mov al, [ds:esi]
; shl ecx, 9 ;ecx=ecx*512 inc esi
;movekernel_loop: mov [es:edi], al
; o32 lodsb ;mov al, [ds:esi] inc edi
; o32 stosb ;mov [es:edi], al dec ecx
; o32 loop movekernel_loop cmp ecx, 0
jne movekernel_loop
jmp $ jmp $