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small optimization to error printer

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saves us 5 bytes of code (15 overall)
This commit is contained in:
Elaina Claus
2024-09-21 13:45:15 -04:00
parent 60a10e41e0
commit 8a3b12774f
1 changed files with 5 additions and 6 deletions
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11
include/errors.inc
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@@ -94,19 +94,18 @@ error:
mov dx, STEVIA_DEBUG_OK mov dx, STEVIA_DEBUG_OK
cmp ax, dx cmp ax, dx
jge error.debug_err jge error.debug_err
mov dh, 0x4F ; color 0x4F is white text/red background
jmp error.print
.debug_err:
mov dh, 0x5F ; debug case is white text/purple background
; the characters are two bytes in the order of 0xb8000: byte c, byte attribute ; the characters are two bytes in the order of 0xb8000: byte c, byte attribute
; since x86 is le, we store the attribute in the MSB of dx ; since x86 is le, we store the attribute in the MSB of dx
mov dh, 0x4F ; color 0x4F is white text/red background .print:
mov dl, al mov dl, al
mov word [fs:0x0000], dx mov word [fs:0x0000], dx
jmp error.stop jmp error.stop
.debug_err:
mov dh, 0x5F ; debug case is white text/purple background
mov dl, al
mov word [fs:0x0000], dx
.stop: .stop:
hlt hlt
jmp short error.stop jmp short error.stop