Hello! Nicolas Welte wrote: > I admit I didn't read the whole thread, but if you want to attach > something to the three ROM sockets in a C64, you know that all data and > address lines are the same on all sockets, and the difference is only in > the three chip select lines? So it's enough to attach to one socket and > pick up the remaining chip select lines from the other sockets with a > wire, or maybe you can have a PCB with different holes for different ROM > spacings for only these two signals. Yes of course, you are correct (apart from the problem that on the SX-64 the chip select lines are different because the ROMs are in a different order, and the narrow C64 boards have totally different ROM layout anyway). The main reason I am not doing this is because I need to supply the signals from ROM (address and data lines) to two different chips, and to make matters worse, one is DIP32 and the other one is PLCC44. I tried very hard to route the signals the way you said, but for the life of me I was not able to do that - there were too many lines going across the PCB and I was not able to route all of them successfully, especially that also two TTL chips come into the picture and need to fit on the PCB somehow. So I decided to make my life "easier", and I am supplying signals to the DIP32 chip from the rightmost ROM socket, and to the PLCC44 from the leftmost one. I agree this is not the most elegant way of doing this :-( Regards, Michau. Message was sent through the cbm-hackers mailing listReceived on 2013-07-19 13:00:58
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