[OT] Acme::6502

[Andy Armstrong]

On 3 Sep 2007, at 11:52, Michael G Schwern wrote:
>> http://search.cpan.org/~andya/Acme-6502/
>
> Whoa, the chip that ran the Commodore computers?!  Wow!  I'll  
> gladly play with
> that.  Why'd you put it in Acme, that's a serious bit of work.

Thanks :)

I'm stuggling to find a sensible use for it - although it works well  
enough to run the BBC Basic ROM from a BBC Micro:

http://www.hexten.net/2007/03/12/fizzbuzz-in-6502-assembler

> Got some example code?  6502 API documentation?  Also most of the  
> functions
> don't say what they return.

I just googled for the 6502 instruction set. Bizarrely I was able to  
remember most of how the processor actually worked - in terms of the  
semantics of the various flags and so on.

Clearly you working on it isn't a high priority. I guess I should  
document it a bit better and provide you with a version that includes  
a copy of the BBC Basic ROM. BBC Basic has a sweet built in assembler  
so you can use that to write code and try it out.

It really is a bit of a poisoned chalice - I had the benefit of a few  
years in which I wrote almost exclusively 6502 assembler - and in  
spite of that I'd decided that testing it was going to be a bit of a  
bugger :)

-- 
Andy Armstrong, hexten.net