Hallo Steve, > I have two of these interfaces but not sure if they work or not. I have two that don't work :( I would expect at least a start up message but nothing at all. > ... plus the VIC-20 IEEE cart. I have this VIC-20 cart, two C64 an one VIC-20 DAMS carts, and four carts containing a EPROM, 6821, 74LS245 and a 7417. Of those four 6821 carts three didn't work: two because of a non-standard EPROM, one because of a brooken switch. All three worked fine with the EPROM of the first one. > Do you have some sort of project in mind? A member of our club bought a 8250LP and wanted to connect it with a C64 but didn't succeed because of a brooken interface. And I wanted to help him. Instead of using the EPROM on one of those carts, I want to have a Kernal with a built-in IEEE driver: the main reason I asked how I could check my Kernals without RS-232 and Cassette interface. And IMHO it would look great to use an original C64 cart. So I wanted to implement the routines of the original EPROM into the Kernal. But someone took a lot of effort to make sure it is very very hard to disassemble the bloody thing :( That's why I asked if the job already has been done. FYI: I disassembled and commented 95% of the 6821 interface disassembled a great part of the DAMS one and I'm also busy with IEEE Kernal of the 64'er project from October 1985. I also made schematics of the DAMS and 6821 interfaces. If interested, as ausual everything is for free! I want to be able to mix IEEE and IEC devices. And that just NOW pops up in my mind: if possible in combination with JiffyDOS (which means I have even more work to do). On possebility is to reserve a byte and using the bits to tell what device is or isn't IEEE. Another possebility, first check if a IEEE device is present and when not, assume it is IEC. Any ideas or comments are welcome! -- Kind regards / Met vriendelijke groet, Ruud Baltissen www.Baltissen.org Message was sent through the cbm-hackers mailing listReceived on 2014-11-05 19:00:03
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