Hallo allemaal, The good news: I replaced the unmarked ICs with marked ones and things worked out fine! Then a bit lesser good news for the most of you: it appears to be a Dutch version of GEOS. To be honest, I even didn't know it existed. But I hardly used GEOS at all. Daniel V. Mackey wrote: > That sounds cool, can you provide High quality pics of the > PCB and ROM dumps of the two 27256 EPROMS? Why do you need the pictures? Maybe I have something better: http://www.baltissen.org/zip/geoscart.zip It contains the schematic, PNG as well as Eagle source, and two BINs. The start code for the whole can be found at the beginning of IC3. Also notice that, although you find 27C256s in the schematic, pin 1 can be controlled as well. So one could use 27512s as well. IMHO a design usable for other purposes as well. Have fun! -- Kind regards / Met vriendelijke groet, Ruud Baltissen www.Baltissen.org Message was sent through the cbm-hackers mailing listReceived on 2013-06-18 18:02:37
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