20 pin Apple HDI-20 connector at the Apple computer, looking into cable-side connector.
This connector is present on the Macintosh Duo MiniDock and PowerBook Duo Floppy adapter. An HDI-20 1.4 MB drive can be connected to this port.
Pin | Name | Description |
---|---|---|
1 | GND | Signal Ground |
2 | GND | Signal Ground |
3 | GND | Signal Ground |
4 | GND | Signal Ground |
5 | NC | No connection |
6 | +5V | +5 volts DC |
7 | +5V | +5 volts DC |
8 | +5V | +5 volts DC |
9 | +5V | +5 volts DC |
10 | NC | No connection |
11 | PH0 | Phase 0: state control line |
12 | PH1 | Phase 1: state control line |
13 | PH2 | Phase 2: state control line |
14 | PH3 | Phase 3: register write strobe |
15 | WREQ | Write request |
16 | HDSEL | Head select |
17 | ENBL2 | External drive select |
18 | RD | Read data |
19 | WR | Write data |
20 | NC | No connection |