19 pin D-SUB female connector at the
computer.
19 pin D-SUB male connector at the
cable.
This connector is present on the Macintosh 128K, 512K,512K enhanced, Plus, SE, SE/30, Classic, Classic II/Performa 200, portable, IIcx, IIci, IIsi, and IIvi/IIvx/Performa 600.
A Macintosh 800K External Drive or an Apple 3.5 Drive can be connected to the Macintosh 512K enhanced, Plus, SE, SE/ 30, Classic, Classic II/Performa 200, IIcx, IIci, IIsi, Portable, and IIvi/IIvx/Performa 600. Ports and Pinouts External Floppy Drive Connector: DB-19 - 23 Connect an Apple SuperDrive to a Macintosh SE (FDHD upgrade), SE/30, Classic, Classic II, IIcx, IIci, IIsi, Portable, and IIvi/IIvx/Performa 600. Connect a Hand Disk 20 to a Macintosh 512K, 512K enhanced, Plus, and SE.
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | CGND | - | Chassis ground |
| 2 | CGND | - | Chassis ground |
| 3 | CGND | - | Chassis ground |
| 4 | CGND | - | Chassis ground |
| 5 | -12V | OUT | -12 VDC |
| 6 | +5V | OUT | +5 VDC |
| 7 | +12V | OUT | +12 VDC |
| 8 | +12V | OUT | +12 VDC |
| 9 | n/c | - | Not connected |
| 10 | PWM | ? | Regulates speed of the drive |
| 11 | CA0 | ? | Control line to send commands to the drive |
| 12 | CA1 | ? | Control line to send commands to the drive |
| 13 | CA2 | ? | Control line to send commands to the drive |
| 14 | LSTRB | ? | Control line to send commands to the drive |
| 15 | WrReq- | ? | Turns on the ability to write data to the drive |
| 16 | HdSel | ? | Control line to send commands to the drive |
| 17 | Enbl2- | ? | Enables the Rd line (else Rd is tristated) |
| 18 | Rd | IN | Data actually read from the drive |
| 19 | Wr | OUT | Data actually written to the drive |
Notes
- Direction is Computer relative Diskdrive