mirror of
https://github.com/ichmagmaus111/ghostgram.git
synced 2026-07-17 04:57:18 +02:00
Ilya Laktyushin
43 lines
808 B
NASM
43 lines
808 B
NASM
org 100h
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[map all]
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section .bss ; follows=.data
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buffer resb 123h
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section .data
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msg db "this is a message", 0
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section .text
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mov ax, msg
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call showax
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mov ax, buffer
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call showax
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ret
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;-----------------
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showax:
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push cx
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push dx
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mov cx, 4 ; four digits to show
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.top
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rol ax, 4 ; rotate one digit into position
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mov dl, al ; make a copy to process
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and dl, 0Fh ; mask off a single (hex) digit
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cmp dl, 9 ; is it in the "A" to "F" range?
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jbe .dec_dig ; no, skip it
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add dl, 7 ; adjust
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.dec_dig:
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add dl, 30h ; convert to character
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push ax
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mov ah, 2
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int 21h
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pop ax
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loop .top
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pop dx
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pop cx
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ret
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;--------------------------
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