PET 4032 rom dumps

From: Francesco Messineo <francesco.messineo_at_gmail.com>
Date: Sun, 29 Dec 2019 10:19:02 +0100
Message-ID: <CAESs-_wviHyTnVpxMeDPKDUwCM-dO2SD0S3day=Y2aR0K44Kfw_at_mail.gmail.com>
Hi all,
I've had another PET 4032 (2001N, no crtc) to repair lately.
This one had an add-on daughterboard, a Microtech Spacemaker II, I believe it's
a multiple ROM selector board that allows up to 4 ROM images to be
switched on the same PET add-on ROM socket. It was removed by the
owner of this PET so I'm unsure whether it was installed on $A000 or
$9000 position, however it has
two EPROMs onboard that I dumped and attached the dump here if someone
wants to have a look and archive them should they be unknown so far.
One is a 2716 labeled 8-4032-9", it reads always the same content with
my DATA I/O 201, but always fails the verify mode.
The other one is a 2532 labeled Basic Plus I (and 1980 COM4 OU 1581 on
the back) and it reads and verifies fine.
Can someone identify at least the starting SYS points?
Thanks

Frank IZ8DWF


Received on 2020-05-29 23:59:58

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