Re: DOES> Register Stomping

At 07:26 PM 5/24/02 -0500, Bulgrien, Dennis wrote:

>May DOES> code stomp on the address register used to put its pfa on the
>stack ( A0 on 68K )?
>
>INTERPRETER
>
>: DOES> POSTPONE {;CODE} {,CODE} !DEST
> [+ASSEMBLER] R )+ A0 MOV A0 ) S -) MOV [PREVIOUS]
> TARGET ] INTERPRETER ; IMMEDIATE

The question is a little confusing, since what follows DOES> is high-level
Forth, which one presumes will compile legal code. It will find the
address on the stack.

In any case, see the 68K CPU Supplement Section 2.2.1 on register
usage, especially the last sentence.

Cheers,
Elizabeth

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Received on Fri May 24 2002 - 18:00:18 PDT