Frank Both ROMS are installed on $9000 socket The 4K ROM looks identical to the Command-O ROM. Initialise SYS 36864 (I believe) http://www.geocities.ws/davegostelow/PETroms/CmdOAd.jpg <http://www.geocities.ws/davegostelow/PETroms/CmdOAd.jpg> Not sure about the other one right now. Andy > On 29 Dec 2019, at 09:19, Francesco Messineo <francesco.messineo_at_gmail.com> wrote: > > 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 > <8-4032-9inches.bin><command-o-1980-basic-plus-I-com4-ou-1581.bin>Received on 2020-05-30 00:00:16
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