Subject: Pinouts (was Re: Unindentifiable motherboard port (II Plus clone)) From: Michael Black Date: Wed, Dec 2, 1998 9Ç49 Message-id: I traced out the circuit last night, and this is the pinout I got. There is nothing to guarantee that some other clone board uses the same pinout. I did make sure the address lines to the 74LS251 did match the Apple II schematic, so the labels have to be correct. pin function 1 +5volts +5volts 2 SW1 SW0 3 SW2 SW1 4 PDL2 PDL0 5 PDL3 PDL1 6 ground ground 7 No Connection No Connection 8 NC NC 9 NC NC That doesn't quite look right, but that's what I got. Interestingly, on this board the rest of the functions on the 16-pin I/O socket of the original are not available off-board. Michael On 2 Dec 1998, David Wilson wrote: > dalloff@freenet.columbus.oh.us (Dave Althoff) writes: > >Michael Black (blackm00@CAM.ORG) wrote: > >: I have a II clone board that I found in the garbage at one point. It was > >: missing parts, so it's scrap. But it had two DB-9 connectors on it. One > >: of them I took off for something else, but the remaining one is male and > >: I assume the missing one was male too. They are both labelld (in silk > >: screening on the board) "Game I/O". The IC's that would be in the > >: joystick circuitry are right near it. > > My Multitech MPF-III (//e clone) uses DE-9M plugs for both the keyboard and > the joystick ports. > > If they are both labeled Game I/O I would hazard a guess that they both have > the same signals but that AN0/1 are swapped with AN2/3 on the second port. > Probably something similar with the push buttons. The advantage of this > would be that you could plug two standard (apart from the sex of the plug) > joysticks in at the same time for two player games. > > Pet Peeve time: it is not a DB-9 but a DE-9. The D is the shape of the plug, > the letter tells you the size and the number the pin count. Here are the > standard ones: > > DE-9 (AT serial port, Apple //e joystick) > DA-15 (IBM PC joystick) > DB-25 (standard serial port) > DC-37 (IBM-PC external floppy) > DD-50 (some really old SCSI devices from Sun etc) > > And these are the high density ones: > > DE-15 (VGA monitor) > DA-26 > DB-44 > DC-62 > > Other than the DB-25, the DD-50 is about the only one people get right. > All the rest get lumped together as DB-xx. > -- > David Wilson School of IT & CS, Uni of Wollongong, Australia david@uow.edu.au > >