Hi Bo, I would also be interested if anyone knows why 901465-01 and 901465-02 are in the option ROM sockets of the SuperPET. I have one that has the same BASIC 2 ROMs in the option ROMs and they are genuine. I did some hunting around and in a Commodore MicroComputer magazine issue 19, there is a QA section for SuperPETs and this was noted: *ROM Protected Software * *If you are having problems using ROM protected software (three board version SuperPET), your dealer has a "ROM Select Modification Kit' - (P/N 9000029). It's free. * I think that might have added the extra side switches that was for UD11 and UD12 as shown here? https://vintagecomputer.ca/wp-content/uploads/2015/10/SuperPET-switches-close-up.jpghttps://vintagecomputer.ca/wp-content/uploads/2015/10/SuperPET-switches-close-up.jpg There is no mention of these switches in the SuperPET Overview manual that I have so if Commodore provided a solution, the option ROM sockets must have been full and required. This is conjecture but if anyone else has any ideas, it would help solve this mystery. Santo On Mon, Oct 4, 2021 at 4:02 AM Gerrit Heitsch <gerrit_at_laosinh.s.bawue.de> wrote: > On 10/4/21 8:06 AM, Bo Zimmerman wrote: > > Hello all, > > > > I recently got a spare option rom (UD11 & UD12) switch panel, of the > > kind often found on the 3-board MMF9000s. One of the two sockets in it > > had a 901465-02, which is a BASIC-2 rom. I figured the prev owner must > > have had that chip sitting around and stuck it in there so it would feel > > wanted. > > > > Anyway, I started investigating whether this switcher board might be > > useful in my single board SP9000, so I opened up my MMF and investigated > > how it was hooked up in there. > > > > To my shock, surprise, and great amusement, I found that my MMF9000 rom > > switcher sockets contained 901465-01 and 901465-02. So I guess the chip > > in the new rom-switcher I got was no fluke! > > > > What explains this though? Of what possible use is a pair of BASIC-2 > > roms in option rom sockets of the 8032 board of the MMF9000? > > Have you verified that the ROM really contains what the printed number > suggests? > > Gerrit > > >Received on 2021-10-04 14:00:02
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