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Use optimized error handling for boot sector

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This commit is contained in:
Nero 2020-04-03 17:38:33 +00:00
parent cb48e628db
commit 3da473a00c
2 changed files with 27 additions and 23 deletions
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18
inc/booterr.asm Normal file
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@ -0,0 +1,18 @@
errcll: pop dx
errjmp: call dmpdx
hlt: hlt
jmp hlt
dmpdx: xor bx, bx
mov ah, 0x0e
mov cl, 4
call dmpdx1
dmpdx1: call dmpdx2
dmpdx2: mov al, dh
shl dx, cl
shr al, cl
add al, 0x30
cmp al, 0x3a
jl dmpdx3
add al, 7
dmpdx3: int 0x10
ret