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- mov ah, 0x0e
- mov bp, 0x8000 ; this is an address far away from 0x7c00 so that we don't get overwritten
- mov sp, bp
- push 'A'
- push 'B'
- push 'C'
- ; to show how the stack grows downwards
- mov al, [0x7ffe] ; 0x8000 - 2
- int 0x10
- ; however, don't try to access [0x8000] now, because it won't work
- ; you can only access the stack top so, at this point, only 0x7ffe (look above)
- mov al, [0x8000]
- int 0x10
- ; recover our characters using the standard procedure: 'pop'
- ; We can only pop full words so we need an auxiliary register to manipulate
- ; the lower byte
- pop bx
- mov al, bl
- int 0x10 ; prints C
- pop bx
- mov al, bl
- int 0x10 ; prints B
- pop bx
- mov al, bl
- int 0x10 ; prints A
- ; data that has been pop'd from the stack is garbage now
- mov al, [0x8000]
- int 0x10
- jmp $
- times 510-($-$$) db 0
- dw 0xaa55
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