Service manual

Chapter 2 E20 Specification
FileStore Service Manual 33
The connectors are 34-way DC male sockets, wired as below:
Pin Signal Comments
1 Gnd
2 R/notWrite
3 Gnd
4 12 2MHz Clock
5 Gnd
6 Not MNI
7 Gnd
8 Not IRQ
9 Gnd
10 not WENCH
11 Gnd
12 Not Used
13 Gnd
14 Not RST
15 Gnd
16 Not Used
17 Gnd
18 D0
19 D1
20 D2
21 D3
22 D4
23 D5
24 D6
25 D7
26 D8
27 A0
28 A1
29 Gnd
30 Gnd
31 Gnd
32 Gnd
33 5V
34 Gnd
If the second connector is used, the E20 device must be modified by removing resistor packs,
as described in Termination, at the end of the chapter entitled Circuit Description.