维基百科说:
Auxiliary flag is set(AF=1) if there is a carry from low nibble to high nibble or a borrow from a high nibble to low nibble of the low order 8-bit of a 16-bit number.(for example, in BCD addition or subtraction.)
这是否意味着当我这样做时:
MOV AL, 25F
因为 25F 是 00100101 并且下半字节不够,所以设置了 AF?
还是仅在加法/减法期间?