HP Vectra Reference Manual page 67

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