Apple LaserWriter Serial
From HwB
Pinout
25 PIN D-SUB CONNECTOR
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | GND |  |
Ground |
| 2 | TXD- |  |
Transmit Data |
| 3 | RXD- |  |
Receive Data |
| 4 | RTS | |
Request To Send |
| 5 | CTS | |
Clear To Send |
| 6 | DSR | |
Data Set Ready |
| 7 | GND | |
Ground |
| 8 | DCD | |
Data Carrier Detect |
| 20 | DTR- | |
Data Terminal Ready |
| 22 | RING | |
? |
Note: Direction is Printer relative Computer.