You might want to take a look here: http://forum.6502.org/viewtopic.php?f=4&t=6674 https://www.forum64.de/index.php?thread/116391-mos6702-superpet-dongle-dissected/&postID=1695189 On 22.10.2022 16:30, ruud_at_baltissen.org wrote: > Hallo allemaal, > > > I once had a SuperPET but sold it. Main reason: I want to tinker with > computers I have and tinkering with a perfect SuperPET is not done > IMHO. The idea was to create my own upgrade to turn a 8032, 8096 or > 8296 into a SuperPET anyway. To avoid inventing the wheel twice I did > some research lately and found two old projects: > https://forum.vcfed.org/index.php?threads/commodore-8032-add-on-board-superpet.49423/page-4 > > https://github.com/nils-eilers/uMMF > > I was able to contact Dave, the owner of the first project and he > pointed me to the 6702. I completely forgot about that one. To make it > short: what is known about it now? Bo Zimmerman's site still says > nothing is known and I found a PDF that mentions patching the various > Waterloo disks. > > But I wonder: hasn't anybody tried a brute force attack yet? And you > don't have to start from zero; Mike Naberezny wrote the document I > mentioned above so the routines that approach the 6702 are known, > including input and output: Waterloo-D64-Disk-Patches.pdf > https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwjRo4ThgfT6AhVMPewKHaO6BfMQFnoECEUQAQ&url=http%3A%2F%2Fmikenaberezny.com%2Fwp-content%2Fuploads%2F2012%2F04%2FWaterloo-D64-Disk-Patches.pdf&usg=AOvVaw0r69W200tHnCnujugkTap9 > > > If I create a board, I won't use the same, IMHO stupid, idea of > powering the 6502 off so the 6809 can access the bus. I'm using a > 65816 anyway and it can be tri-stated, so why not making use of it? > Another advantage (I think), the 6502/65816 can continue after the > instruction it gave to activate the 6809. > > Any comment, ideas, etc is welcome! > >Received on 2022-10-22 18:04:07
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