Re: R6502AP

On 2014-11-27 01:18, groepaz@gmx.net wrote:

>> The R6502AP is AFAIR a 2MHz Rockwell version. I got those in place of
>> 1MHz MOS6502s, which I wanted. Wondering now whether I should return
>> them. If they are indeed fully compatible / the same as MOS then fine.
>> Otherwise I can envision some unpredictable things with e.g. the illegal
>> opcodes.
> 
> you could try running the available test programs on it :) (eg put it into a 
> 1541 and run the testsuite by ninja (csdb) which is a port of the lorenz 
> suite, and checks pretty much all important things except a few odd corner 
> cases of the so called "unstable" opcodes - which are not terribly important 
> for real world programs anyway)

I ran the tests. Tried earlier but they take much longer than I thought
so I finished only tonight. And.. the MOS 6502AD passes all the tests
from that suite. The R6502AP fails repeatedly on one called "pc64-aneb".
Since the mnemonics are different from what I once learned I don't know
what command this is. Probably something from the AND family. But the
difference is there every time I run the tests (why - BTW - does it have
to spin the motor all the time?)

-- 
SD!

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