HP Vectra User Manual

Table 2.10
Accessible Registers
Register
Digital Output Register
Digital Control Register
FDC Data Register
FDC Status Register
Digital
Input Register
Digital Output Register
RIW
w
W
RIW
R
R
I/O Address
Primary Secondary
3F2 372
3F7 377
3F5 375
3F4 374
3F7 377
Bit Data Definition
7 Reserved
6
Reserved
5 Drive B motor enable, active high turns on motor
5 1 /4" drive
4
Drive A motor enable, active high turns on motor
5 1 /4" drive
3 Interrupt and
DMA enable, activ high
2
FDC reset, active low will reset
Reserved
0
0
Drive select, Drive A
Drive B
Processor Board 47

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