Specifications

EPC-7 Hardware Reference

Floppy Connector

The EPC-7 offers two floppy connectors: a 34-pin connector and a smaller 26-pin

connector that is a subset of the 34-pin connector. This is a build-time option. The

pinouts are as follows:

Pin Signal Pin Signal Pin Signal Pin Signal

1 GND 2 GND 1 Fused VCC * 2 ~INDEX

3 n/c 4 n/c 3 Fused VCC * 4 ~DS0

5 n/c 6 n/c 5 Fused VCC * 6 ~DSKCH

7 Fused VCC * 8 ~INDEX 7 n/c 8 n/c

9 Fused VCC * 10 ~DS0 9 n/c 10 ~MO

11 Fused VCC * 12 ~DS1 11 n/c 12 ~DIR

13 GND 14 GND 13 n/c 14 ~STEP

15 GND 16 ~MO 15 GND 16 ~WDATA

17 GND 18 ~DIR 17 GND 18 ~WGATE

19 GND 20 ~STEP 19 GND 20 ~TRK00

21 GND 22 ~WDATA 21 GND 22 ~WRPRT

23 GND 24 ~WGATE 23 GND 24 ~RDATA

25 GND 26 ~TRK00 25 GND 26 ~SIDE

27 GND 28 ~WRPRT

29 GND 30 ~RDATA

31 GND 32 ~SIDE

33 GND 34 ~DSKCH

Table 15. 34-pin and 26-pin Floppy Connector Pin-outs.

* Note: Pins 7, 9, and 11 on the 34-pin connector or pins 1, 3 and 5 on the 26-pin

connector are not connected unless the fuse is installed. The EPC ships with the

fuse installed and the fuse is not user-replaceable.

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