On Friday, I acquired a 8032 and a 8023P printer. When I looked at the expansion connector (it is hidden behind the case of my 8032-SK), I got an idea: Would it be possible to build a cartridge that can be fitted both to a 8032 and (with a little sawing) to a VIC-20? The circuit board would look like this (use fixed-width font to view it) ------------------------ | | | cartridge | | (ICs) | | | | | ----------------------- | | | | | | | | | | | | | | | | | | | | | | <-- VIC-20 cartridge port connector :::::::::::::::: <-- PET memory expansion port connector When the mounting holes for the PET memory expansion connector (2x25 holes) are sawed off, the circuit board can be connected to a VIC-20. When a connector is soldered there, the board can be installed in a PET. The logic array would probably also have to be programmed in a different way. The main idea is simply that with this kind of a design, it would be possible to have the "all games in one cartridge" concept also for the PET. The cartridge could also be used as some sort of mass storage, just like the VIC-20 version. My question for PET experts is: Are there free I/O block selection signals on the expansion port? And regarding the 6545 CRTC: are the registers R18 through R31 unassigned? Marko - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
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