Quote:
Originally Posted by SiriusHardware
Phew, what a relief that replacement of the 74LS145 does seem to have made a difference but I am wondering if the socket that the 6520 is fitted in is causing you problems as well - TonyDuell did say that in his experience the IC sockets in PETs can be troublesome.
If it keeps on working, just leave well alone (if it isn't broken, don't try to fix it). But if you do have further problems you may need to consider having the 6520 socket changed and have the solder joints on the keyboard connector resoldered as well.
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Yes-it might be worth doing! The guy I asked is a genius at soldering!!
Thank you so much for everything. You guys are the best! I will give it a thorough testing tomorrow morning and get back to you-fingers crosses and all that!!