Re: PET-2001 showing just '?' on screen

From: Ethan Dicks <*ethan.dicks_at_gmail.com*> Date: Fri, 29 Jul 2016 09:14:20 -0400 Message-ID: <CAALmimnq3ts3ydKkBODsDFLYa_hUEfhZ2YccQ7L9Uovj6mvaLg@mail.gmail.com> · ethan.dicks_at_gmail.com

On Fri, Jul 29, 2016 at 8:36 AM, Anders Carlsson
<anders.carlsson@sfks.se> wrote:
> Francesco Messineo wrote:
>>> 2516 = 2716
>>> 2532 != 2732

Yep, though you can move some pins around (stacked sockets and jumper
wires or a small PCB) and make an in-socket 2732->2532 adapter.  2532s
were never common, and we have been making adapters since the 70s.

>> my CBM 4032 wants 2532 or compatible pinout. I don't know about other
>> PETs.
>
> Indeed, so does my CBM 3032, which should have the same motherboard as
> 2001-N.

Yes.  I have a 2001-N.  This model was badged in Europe as the 3032 -
dynamic RAM, 2332 ROMs (2532 EPROM pinout), TTL video (no 6545 CTRC,
so the video requires zero software initialization).

I've stuffed both 2532s and 2716s in my ROM expansion sockets, and
replaced one dead BASIC ROM with a 2532.

-ethan

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