17 lines
881 B
Text
17 lines
881 B
Text
mov ah, 02h ;prep int 21h for printing to screen
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mov ax, seg SpamMessage ;load into ax whatever segment the address of our message is in.
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mov ds, ax ;segment registers on the original 8086 must be loaded from a register
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cld ;clear the direction flag, this makes commands like "lodsb" auto-increment
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SpamOuter:
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mov si, offset SpamMessage ;load the address of SpamMessage into the source index
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SpamInner:
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lodsb ;mov al,[ds:si] and increment si by 1.
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cmp al,0 ;is this the terminator?
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jz SpamOuter ;point si to the beginning of the message again
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mov dl,al ;the DOS interrupt for printing requires the desired character to be in DL
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int 21h ;print the chosen character to the screen
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jmp SpamInner
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SpamMessage db "SPAM",13,10,0
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