From memory, those jumpers control which data line is used as 'select for the two joystick ports. Quite why this was only on the C16 board is equally baffling. rob > On 01/25/2012 03:47 PM, Rob Clarke wrote: > > The question is, what was the sequence in the 264 development? I think > the C16 was the last one. I wouldn't surprise me if the layout of the +4 > board was done while the change to the PLA and extra logic was > relatively recent and they wanted to keep their options open. > > BTW: The C16 board also has 2 unexplained jumper blocks on the board > next to U11 (74LS125) labeled D1 and D2. They are not mentioned in the > schematics. Anyone have an idea what they are for? > > Gerrit > > > Message was sent through the cbm-hackers mailing list > Message was sent through the cbm-hackers mailing listReceived on 2012-01-26 09:19:27
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