Specifications

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
Notes:
SEL 0
GROUND
SEL 1
GROUND
sa 2
GROUND
MOTOR ON
GROUND
DIRECTION
GROUND
STEP
GROUND
WRITE DATA
GROUND
WRITE GATE
GROUND
TRACK 00
GROUND
WRITE PROTECT
GROUND
READ DATA
GROUND
SIDE
GROUND
SPARE
RESERVED
RESERVED
RESERVED
RESERVED
8-19
C-19
C-18
C-17
A-16
A-17
B-20
C-20
A-18
8-29
C-29
B-16
C-16
A-19
B-17
A-3Q
8-30
C-30
All disk drive lines are
active
low.
Use for Disk Size Mode
Reserved for hard disk version
II II " .. ..
II II II ..
..
1. Pin nuRbers in the above table refer to standard edge connector pin numbers for a 5.25
inch floppy disk drive.
2.
If the Motor control line must be used, it could be controlled by on of the QUARK parallel
I/O lines (if suitably buffered), or by one of the Drive Select lines. Either of these
configurations
would require a patch to the BIOS.
- -
.
TABLE Vllld
8-INCH FLOPPY DISK DRIVE INTERFACE
EDGE CONNECTOR FUNCTION QUARK PIN REMARKS
---
-
-------
---
1
GROUND
2 LOW CURRENT
B-18
3
GROUND
4,6,8,10
N/C
5,7,9,11 GROUND
12 DISK CHANGE
13
GROUND
14 SIDE
A-19
15 GROUND
16
IN USE
17 GROUND
18
HEAD LOAD
19 GROUND
20
INDEX A-29 Read Data, Write Data, Index,
21 GROUND
A-20
and Step may each be twisted
22
READY with ground wires.
23 GROUND All disk drive lines are
24
SECTOR active low.
25
GROUND
26 SEL 0
8-19
Megatel Computer Technologies Toronto, Canada
Appendix Page A-13