6502.org

"Away?" What does that mean?

It means that Drass lacks _any_ spare time for job related reasons in times of COVID-19,
and that Drass can't tell if/when he makes it back into the forum... and into TTL hobby tinkering.

So it's better to have all of the PCB layouts and schematics for the CPU on more than just _one_ PC...
...even if they are not "officially qualified" as "production quality" files.

He all.

This topic about the 6502 based on TTL is exciting.

I am interested in the simulation of the 6502 under LabCenter's Proteus software. Proteus does not bring the 6502 CPU natively and I have searched for it for a long time browsing the Internet.
I found on YouTube: "virtual 6502 CPU w]ith LCD panel "Hello, World", by Jonathan Hudson aka BrainByte aka GreenRaptor. In this video you can see a simulation of a 6502 based on DLL under Proteus., but apparently, this person is not willing to share anything about it.
Finally I found these links, for a 6502 Proteus model whose author is Lavr:
http://www.nedopc.org/forum/viewtopic.p ... 8&start=15
http://www.nedopc.org/forum/viewtopic.p ... 12#p145812
, in them the 6502 is not implemented with a DLL, but with TTL IC's. I sense that it has been based on A Homemade TTL 6502
I have simulated some cards and software with this implementation and it is acceptable, but the timing of Ф2 does not correlate with Ф0 and it is not 50% duty cycle.
I would be very grateful if you could let me know if any of you have worked with an implementation of 6502 on proteus and even 6522.

Kind regards.

Proteus working 65c02 model

https://github.com/jdimeglio/65C02-Proteus