HP Vectra

change via hardware. (Refer to HP Vectra Technical Reference
Manual Volume 2: System BIOS for the appropriate techniques to
accomplished this detection.)
Table 2.11
Control Interface Pin Assignments
Pin I/O
Signal Name
2 0 - REDWRCUR
4
Not
used
6 Not used
8 I
-INDEX
10 0
-MOTEN 1
12 0
-DS2
14 0
-DS1
16
0 -MOTEN2
18 0
-DIRECTION
20
0
-STEP
22
0
-WRITE DATA
24 0
- WRITE ENABLE
26 I
-
TRACK 00
28 I
-
WRITE PROTECT
30 I -READ DATA
32
0
-
HEAD SELECT
34 I
-DISC
CHG
1-33
Odd pins are ground
The following signal descriptions are for the interface between the
controller and the 5 1/4 inch drives. All output signals are driven
with the 7438. All inputs are 74LS14 wth 2.2K pull-ups.
50 Processor Board