Mini-8 Function DB-25
1 HSKo --> DSR 6
2 HSKi <-- DTR 20
3 TXD- --> RXD 3
+--4 SGND --- SGND 7
|
| 5 RXD- <-- TXD 2
|
| 6 NC 8
|
| 7 GPi* <-- RTS 4--+
| |
+--8 NC CTS 5--+
- FGND NC FGND 1-----+
|
Shield o----------o Shield---+
Pins 4 and 8 are jumpered on the mini-8 side of the cable; pins 4 and 5 are
jumpered on the DB-25 side of the cable as are pins 1 and the shield.
To connect DB-25 cables of Apple II family peripheral cables to the serial
ports of the Apple IIGS, use the Apple IIGS Peripheral Adapter Cable. This
short cable's male mini-circular 8 connector plugs into the IIGS printer and
phone serial ports with the female mini-circular 8 connectors on the back of
the IIGS. The DB-25 connector at the other end of the adapter cable will take
the DB-25 connectors of the DB-25 cables used with many Apple peripherals.
Some modems and communications software may need a DCD signal and therefore
may require a modem eliminator cable in the cable configuration. The modem
eliminator cable flips pins 2 with 3 and 6 with 20 and passes GPi access
through to pin 8. GPi, for General Purpose input, is a high or low signal
read from and determined by the connecting device.