Re: Hardware emulation of 6509 using 6502?

From: Jim Brain <brain_at_jbrain.com>
Date: Thu, 5 Jul 2018 21:55:37 -0500
Message-ID: <babfb8b0-2bc2-c615-b676-3712d213e796@jbrain.com>
On 7/5/2018 5:50 AM, Michał Pleban wrote:
> Hello!
>
> Jim Brain wrote:
>
>> The easiest way to test would be to provide me with the address you want
>> to start the trace at, and I will set that as a trigger.
> I can see that the KERNAL jumps to $FAD7 when it finds a memory value
> which does not match. Can you set your trigger for this location, and
> show as much as possible of what the CPU did before?
>
> Regards,
> Michau.
>
>
>
>
It looks like the test is not failing in the same spot all the time.  It 
looks like a transient error.  Any chance to extend your program to do a 
bunch of write and reads and report any issues?  It would help to see if 
there is a stuck bit or something else.

Jim

-- 
Jim Brain
brain@jbrain.com
www.jbrain.com
Received on 2018-07-06 05:00:04

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