NASM 16位英特尔 [英] NASM 16bit Intel
问题描述
我有指向一个地址,并在我的情况字节的变量写大小麻烦。这给我的错误错误:无效的有效地址:
I am having trouble with pointing to a address and write in my case a variable of byte in size. This gives me the error "error: invalid effective address":
mov byte[AX], byte 0x0
一些试错后,我测试相同,但与EAX。这将编译就好了:
After some trail and error i tested the same but with EAX. This compiles just fine:
mov byte[EAX], byte 0x0
我是什么在这里失踪?
What am I missing here?
推荐答案
[AX]
是一个无效的内存操作数规格。
[AX]
is an invalid memory operand specification.
在有效的16位的是:
[常量]结果
[BX]结果
[SI]结果
[二]结果
[BX +常数]结果
[BP +常数]结果
[SI +常数]结果
[DI +常数]结果
[BX + SI]结果
[BX + DI]结果
[BP + SI]结果
[BP + DI]结果
[BX + SI +常数]结果
[BX + DI +常数]结果
[BP + SI +常数]结果
[BP + DI +常数]
[constant]
[BX]
[SI]
[DI]
[BX+constant]
[BP+constant]
[SI+constant]
[DI+constant]
[BX+SI]
[BX+DI]
[BP+SI]
[BP+DI]
[BX+SI+constant]
[BX+DI+constant]
[BP+SI+constant]
[BP+DI+constant]
[BP]形式上是无效的,但许多组装会悄悄地把它转换成[BP + 0]
[BP] is formally invalid, but many assemblers will quietly convert it into [BP+0].
请参阅内存操作编码和MODR / M和SIB字节的CPU手册。
See the CPU manual for memory operand encodings and the ModR/M and SIB bytes.
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