Lol... my ears perked up at wondering what the state of some of the PIO cores might be and I googled vhdl and 6522 and the first hit was a post from André from 2005 on this board.

-----Original Message-----
From: owner-cbm-hackers@ling.gu.se [mailto:owner-cbm-hackers@ling.gu.se] On Behalf Of Ethan Dicks
Sent: Friday, May 01, 2009 11:43 AM
To: cbm-hackers@ling.gu.se
Subject: Re: 90x0

On Fri, May 1, 2009 at 10:44 AM, "André Fachat" <afachat@gmx.de> wrote:
>
>> Wow.  That's large.  I've wanted a laptop-sized PET for a while, but I
>> think it would have to be a 100% new design that replicates the
>> functionality of a PET (unlike the C-64 laptop I saw pictures of
>
> I've managed to put the board on three Eurocard boards
> (160mm by 100mm) without any custom chips.

I've seen that.  It looks very interesting.  I'm personally not
opposed to using GALs to reduce part count, but I own multiple burners
and I've been working with PALs since 1984.  It's a technology I'm
comfortable with.

> I still think it is possible to put the PET into one FPGA
> and some day I hope I actually manage to do that

That sounds entirely do-able, but it is beyond my skills to engineer -
I could construct it, but I wouldn't personally attempt that as the
sole designer.  I know the 6502 core is done and available, but I
don't know about the 6520 or 6522.

-ethan


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