Interface Boards And Mass-Storage Drives; The Integrated Ultra Vga Video Controller - HP Vectra XM5 4 Technical Reference Manual

3 INTERFACE BOARDS AND MASS-STORAGE
DRIVES
This chapter describes the Enhanced Ethernet Network board, and the disk drives that are
supplied with the PC.

THE INTEGRATED ULTRA VGA VIDEO CONTROLLER

A 64-bit PCI Ultra VGA video controller, S3 Trio 64 PnP, is integrated on the system board on
all models. It can be characterized as follows:
100% compatible with IBM ® VGA display standard
•
• integrated 24-bit RAMDAC
• fully programmable Pixel Clock Generator up to 135 MHz
• 60 MHz clock for video memory
• fast linear addressing with full software relocation
• Green PC power saving features
• DDC 1 compliant.
Video Memory
1 MB is fitted as standard. Two sockets are provided for installation of an additional 1 MB (two
modules, each with a 512 KB, 60 ns surface mount chip). The installed video memory capacity
is detected automatically by the BIOS.
Normally, the controller gives 32-bit video memory access, with 1 MB of video RAM fitted. This
is increased to 64-bit access when the additional 1 MB upgrade is installed.
There is no orientation key to determine the polarity of the upgrade chips, so care must be
exercised to align the point on the chips with the white dot on the system board (place the cut
edge of the chips towards the left side of the PC). A special extraction tool (5041-2553) is
needed when removing them again.
Video Modes
Standard and Enhanced Video Graphics Array (VGA) modes are available, as detailed in the
tables on the following pages. Hardware acceleration of graphical user interface (GUI)
operations is provided, and acceleration for 8, 16 and 32-bit pixel depths.
The following table details the standard VGA modes which are currently implemented in the
video BIOS. These modes are supported by standard BIOS functions. The video BIOS (which
is mapped contiguously in the address range C0000h to C7FFFh) contains all the routines
required to configure and access the video subsystem.