Hi Guys, I recently acquired a PET 8032 which has a couple of interesting add-on's ... 1) MICROTECH PETDISK II This is an 8" disk system for the PET! - the controller card installs in the "edit" ROM socket (the EDIT ROM moves to the card), it also has it's own ROM, and is "hotwired" into several other PET signals via "flying leads"... I don't have any documentation for this system other than a single handwritten sheet which shows the connections (they match the way it's installed), an address of 59904 to start the system (this works) and a few commands such as !SYS to get a menu, and !LIST to display the directory (these also work). The two original MICROTECH diskettes both exhibit disk errors - looking at them, it appeasr that they have both sat in the continuously running 8" drive long enough to wear visible groves at track 0 (really visible). I did find two other "backup" disks, which boot (SYS 59904) and enable the above commands. Lots of details I have not been able to figure out - can anyone provide more information on this disk system? Anyone have documentation? 2) Madison Computer Z-RAM This one I have full docs for - it's a Z-80 / expansion RAM board which fits under the monitor and connects to the PET via the 6502 socket (the 6502 moves to the Z-RAM board). What I don't have is any software for it - it apparently runs CP/M, and should have come with a double sided CP/M disk (one side for 2031&4040, one side for 8050 drive) ... Anyone got the software or other material for this board? ++ Among the 8" diskettes that came with the machine are some which are labled as CP/M format - and I can't read a sensible directory using the PETDISK software - Perhaps someone ported CP/M to the PETDISK II / ZRAM combination? - If so, any idea how I would boot it? - anyone have this particular combination operating? You can see pictures of the machine and these devices on my site (just updated this afternoon). Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Vintage computing equipment collector. http://www.parse.com/~ddunfield/museum/index.html