Pinouts (was Re: Unindentifiable motherboard port (II Plus clone))

[Michael Black <blackm00@CAM.ORG>]

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
> 
>