HP Vectra User Manual

Mode Control Register
The mode control register is a 6-bit write-only register.
,.
Bit
Data Definition
0 0 40 character alpha, 320x2 graphics, 640x1 graphics
1 80 character alpha, 640x2 graphics
0 Alpha mode
1
Graphics mode
2*
0 Color mode
1
Black and white mode
3 0
Disable video
1 Enable video
4 0 Select 320 pixel graphics
1 Select 640 pixel graphics
".
5 0 Attribute bit 7 is background intensity
1
Attribute bit 7 is blink
*Bit 2 provides a secondary function tying the blue and green
guns together changing the displayed colors.
Multi-Mode Video Adapter Card 93

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