Эмулятор процессора Intel 8086 версия 4.05 (ENG) / asm_files / bcd_aas.asm

Assembler Source Code a:link {text-decoration: none} a:visited {text-decoration: none} a:hover {text-decoration: none; color:#ff0000}     ; bcd_aas.asm ; this is an example of aas instruction, ; it is used to subtract huge bcd numbers (binary coded decimals). name "bcd_aas" org 100h ; make 5 - 8 ; al = 0fdh (not in binary coded decimal form) mov al, 05h mov bl, 08h sub al, bl ; convert to binary coded decimal, ; al = 7 ; and 1 is borrowed from ah, like calculating 15 - 8: aas ; convert to printable symbol: or al, 30h ; print char in al using bios teletype function: mov ah, 0eh int 10h ; wait for any key press: mov ah, 0 int 16h ret ; return control to operating system.

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