Hallo Bo, Yesterday I finished it so far that the only thing I have to add to the SCH are the two headers. After that I'll give it a try to polish it up a bit ie. re-group the components plus double-check the connections. Then I'll make a description of the whole SCH. > Does it look like something folks would be able to duplicate? IMHO, yes. > Are there any really hard-to-find chips on there? The 6525A. Even I don't have any spares :( The C-port is not used AFAIK. But after reading the docs I noticed one bit of port C can be used as interruptline. I'll check that this evening if possible. If not all funtions/ports are used, I wonder if it would be possible to use a 6526, 6522 or, in the worst case, plain TTL-registers/latches. Another solution is to replace the 6525A by a 6526A and change the BIOS. But as I haven't any idea at all if this will have impact on existing software, this is the last thing I would do. ___ / __|__ / / |_/ Groetjes, Ruud \ \__|_\ \___| http://Ruud.C64.org Message was sent through the cbm-hackers mailing list
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