On 03/09/2014 10:01 AM, smf wrote: >> If set to input in the DDR they should read as '1' > > Only if there is a pull up resistor on the undefined bits, which there > may or may not be. If it's the normal 6525 die (and I doubt Commodore made a new die just for that, much easier just use a different package), then there should be. Should be easy enough to check by someone with a working 6523T. > (*) I'm guilty of that though, so I admire the intention to get it > right. I guess there is a potential that someone wrote custom code for > accessing the 1551 as well, so just looking at the rom isn't necessarily > enough. As far as I know, there are some speeders for the 1551. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2014-03-09 10:00:37
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