B. Specifications
42
J2, J3 (Floppy Interface)
Although not located directly on the front edge of the ZT 8954, J2 and J3 are described
in this section. These connectors accommodate 0.1" 34-pin floppy interface drives. The
pinouts are given in the "J2 and J3 Pinout (Top View)" illustration below. J3 is a reverse
image of J2 to allow interfacing to drives with minimal cable twisting.
J2 or J3
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
33
31
29
27
25
23
19
21
17
15
13
11
9
7
5
3
1
DRVDEN 0
NC
DRVDEN 1
INDEX*
ME1*
DS0*
DS1*
ME0*
DIRECTION*
STEP PULSE*
WRITE DATA*
WRITE ENABLE*
TRACK 0*
WRITE PROTECT*
READ DATA*
HEAD SELECT*
DISK CHANGE*
MEDID1
†
MEDID0
†
†
J2 and J3 Pinout (Top View)
†
The polarities of DRVDEN1 and DRVDEN0 are selectable via W6-9; consult Appendix A for details.
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