Here are the pinouts for connecting an Apple IIGS to the ImageWriter II or
ImageWriter I printer:
Apple IIGS ImageWriter II ImageWriter I
---------- -------------- -------------
DTR 1 DSR 2
HSKI 2 DTR 1 DTR 20
TXD- 3 RXD- 5 RXD- 3
G 4 SG 4 SG 7
RXD- 5 TXD- 3 TXD- 2
TXD+ 6
GP 7
RXD+ 8
Advanced Electronic Support Products, Inc. makes switchboxes that use
mini-circular 8 connectors and all necessary cables.