This Interface provides a centronics printer port and a general I/O port.
Many Accessories were planed (Disk Drive, Modem ...) but sadly none of them have made it into production.
But you can use the printer interface!
PS: Now i am only missing the ram-expansion and the additional keyboard to complete my collection.
Maybe someone likes to build some extensions?
I cut down an old ISA slot and connected it to a centronics printer cable.
You can see which pin goes where in the picture. For "Gnd" you can use either of the 2 mentioned on the centronics plug (my cable had no wire on pin 16, so i took the one from the lower side)
And => the cable works perfect!
Now i can print my Listings and so on, but...
PS: A new printer is on its way...
With my "new" Citizen Swift 24-needle printer one can read the printouts without guessing :-)