Re: 6502 to 8501: new details

From: Nicolas Welte (
Date: 2002-02-25 10:28:24

Daniele Gratteri wrote:
> > The design is freeware, please do.
> Ok, I published it on my web site. You can find it at

I just had a quick look at the design, because I once thought about making my
own, but to save parts (one inverter) I would've used a 6526. Anyway, I think
I found a potential problem: The CPU I/O port is mapped to PA0-PA6 on the
VIA, but I think that the 8501 misses one of P0-P6 and instead has P7. And
just now I can't connect to Funet to check the schematic :-/


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