HP Vectra User Manual

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

HP Vectra Specifications

General

Processor	Intel Pentium
RAM	Up to 128 MB
Storage	HDD (capacity varies by model)
Operating System	Windows 95
Graphics	Integrated
Ports	Serial, Parallel
Expansion Slots	ISA, PCI