Re: Hardware emulation of 6509 using 6502?

From: And Fachat <*afachat_at_gmx.de*> Date: Thu, 22 Feb 2018 13:07:34 +0100 Message-ID: <161bd695b70.27e0.b4d1f2b66006003a6acd9b1a7b71c3b1@gmx.de> · afachat_at_gmx.de

Am 22. Februar 2018 12:59:40 schrieb Michał Pleban <lists@michau.name>:
> smf wrote:
>
>> Or use a 6510 and map p0-p3 to the 0/1 io port, so that the rest of the
>> machine could be tested.
>
> The 6510 has no SYNC signal so it will likely not work (the signal is
> plugged into RAM refresh circuitry).

Also if you change the port, the processor would read the next instruction 
from a different bank. How would you make sure there is valid code if 
instructions and load/store always go to the same bank as determined by the 
port?

Regards
André

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