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sys, boot: mark additional magic offsets

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E. C. Masloch 2024-02-06 23:58:10 +01:00 committed by Kenneth J Davis
parent eb75bea6c1
commit 4ae6f22249
2 changed files with 4 additions and 0 deletions
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3
boot/boot.asm
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@ -264,6 +264,7 @@ real_start:
jmp word 0x1FE0:cont jmp word 0x1FE0:cont
loadseg_off dw 0 loadseg_off dw 0
magicoffset "loadseg", 5Ch, 5Ch
loadseg_seg dw LOADSEG loadseg_seg dw LOADSEG
cont: cont:
@ -276,6 +277,7 @@ cont:
; in DL, however we work around this in SYS.COM by NOP'ing out the use of DL ; in DL, however we work around this in SYS.COM by NOP'ing out the use of DL
; (formerly we checked for [drive]==0xff; update sys.c if code moves) ; (formerly we checked for [drive]==0xff; update sys.c if code moves)
; ;
magicoffset "set unit", 66h, 66h
mov [drive], dl ; rely on BIOS drive number in DL mov [drive], dl ; rely on BIOS drive number in DL
mov LBA_SIZE, 10h mov LBA_SIZE, 10h
@ -616,6 +618,7 @@ do_int13_read:
times 0x01f1-$+$$ db 0 times 0x01f1-$+$$ db 0
magicoffset "kernel name", 1F1h, 1F1h
filename db "KERNEL SYS",0,0 filename db "KERNEL SYS",0,0
sign dw 0xAA55 sign dw 0xAA55

1
sys/sys.c
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@ -1762,6 +1762,7 @@ void put_boot(SYSOptions *opts)
{ {
int i = 0; int i = 0;
/* magic offset: (first) kernel filename */
memset(&newboot[0x1f1], ' ', 11); memset(&newboot[0x1f1], ' ', 11);
while (opts->kernel.kernel[i] && opts->kernel.kernel[i] != '.') while (opts->kernel.kernel[i] && opts->kernel.kernel[i] != '.')
{ {