Posted By
crock
on 2016-04-13
01:41:05
 |  Re: Who has a broken 1551?
Thanks for the feedback gents.
Patrick, George - I wrote a small basic program to test the 1551 cartridge paddle if you want to try it. It checks that the registers in the 6523T can be read and written to at the correct locations. Then, when the DDR's are set as inputs, that they are being pulled up by the drive when powered on.
http://inchocks.co.uk/commodore/1551/1551test.prg
This should be good enough to determine that the PLA and the 6523T are in good working order. Feedback welcome.
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