Apple Macintosh External Drive connector

#Computer#Storage Connectors#Apple

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.

19 pin D-SUB FEMALE connector  at the computer

A Macintosh 400K External Drive can be connected to the Macintosh 128K, 512K, 512K enhanced, Plus, SE, and Portable.
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.

PinNameDirDescription
1CGND---Chassis ground
2CGND---Chassis ground
3CGND---Chassis ground
4CGND---Chassis ground
5-12V-->-12 VDC
6+5V-->+5 VDC
7+12V-->+12 VDC
8+12V-->+12 VDC
9n/c-Not connected
10PWM?Regulates speed of the drive
11CA0?Control line to send commands to the drive
12CA1?Control line to send commands to the drive
13CA2?Control line to send commands to the drive
14LSTRB?Control line to send commands to the drive
15WrReq-?Turns on the ability to write data to the drive
16HdSel?Control line to send commands to the drive
17Enbl2-?Enables the Rd line (else Rd is tristated)
18Rd<--Data actually read from the drive
19Wr-->Data actually written to the drive
Note: Direction is Computer relative Diskdrive.

Apple ATA connector

Apple Macintosh External Floppy disk drive connector