mark@motcsd.UUCP (Mark Jeghers) (04/01/89)
I have an unknown and undocumented IO card in my AT clone. It appears
to have a parallel port, a game port, a serial port (with the option for
a second one), and empty space where a clock can be soldered in. Included
in this posting is a rough drawing of what is on the board, and how it is
laid out. Can anyone identify the make of this board so I can determine
which dipswitches do what??? I can figure most of the jumpers out...
The card fits in a short slot, drawing has been enlarged to fill the screen...
10-pin plug (optional COM2?)--+ +--16 pin plug
+------------------------------------------------|----------|-----+ (COM1)
| +------------------------+ +-------+ # ======= ========== |
| | empty spot for 2nd | | empty | # ||||| <--5 jumpers |
| | serial port UART | +-------+ \ |
| +------------------------+ +-+ +-------+ 4-pin plug +-+ +---+
| +------------------------+ | | | empty | (pin 2 gone) | | | |9 pin
| | UART for | | | +-------+ /--->| | | |game
| | serial port 1 | +-+ <---- 6 jumpers / +-+ +---+port
| +------------------------+ 5 jumpers ----/ |
|. . . . . . +--------+ +----------------+ |
| This area . | XTAL | | 8 dip switches | +---+
| marked off . +--------+ +----------------+ | |
| by dots is . . . . (1.8432Mhz) | |25
| vacant, but it has . | |pin
| markings and holes . | |para-
| for adding what . | |llel
| appears to be a . | |port
| battery, a clock . +-----+ | |
| chip, and about 15 . | | <-- 4 dip switches | |
| or so passive parts. +-----+ +---+
+-----------------------------------------------------------------+
Look familiar? Can anyone identify this?
Mark Jeghers
Motorola Computer Systems