Connectors; Enhanced Ethernet Network Board - HP Vectra XM5 4 Technical Reference Manual

If you attempt to set the resolution or number of colors higher than is supported by the installed
video memory, the screen refresh rate is lowered automatically, and image flicker becomes
more noticeable. If the resolution/refresh-rate combination is set higher than the display can
support, you risk damaging the display.
The number of colors supported is limited by the graphics card and the video RAM. The
resolution/refresh-rate combination is limited by a combination of the display, the graphics
card, and the video RAM.

CONNECTORS

The layout of the pins for the DB15 VGA socket are depicted under "Socket Pin Layouts" later
in this chapter.
The Video Electronics Standards Association (VESA) defines a standard video connector,
variously known as the VESA feature connector, auxiliary connector, or pass-through
connector. The video controller supports an output-only VESA feature connector in VGA mode.
This connector (whose pin names are listed in a table under "Internal Connectors" later in this
chapter) is integrated on the system board, and is connected directly to the pixel data bus and
the synchronization signals.
This internal VESA pass-through connector is disabled by default. To use it in DOS, Windows
3.11 or Windows 95, the FCON.EXE utility, from "HP Utils", must be executed. This utility
configures the system.
Use of the VESA feature connector will disable the 1 MB video memory upgrade, if one is
installed. Only the standard 1 MB of video memory will be used.

ENHANCED ETHERNET NETWORK BOARD

The Enhanced Ethernet Network board (AMD PCnet-PCI-II AM79C970A) is supplied on all
models in a PCI accessory slot underneath the internal, hard disk drive, rear-shelf. It is plugged
into the PCI accessory slot that is situated on the right-hand side of the double-sided backplane
board.
It is fully compliant with the 10-BaseT, 10 Mbits per second, ISO 8802-3 (IEEE/ANSI 802.3)
standard. There is a socket to support an Option ROM of up to 32 KB. On the rear panel there
is one RJ-45 unshielded-twisted-pair (UTP) connector, as shown in the diagram under "Internal
Connectors" later in this chapter.
There is a cable from the network board to the external start connector on the system board.
This is used to implement the Remote Power-On feature (RPO) that is described in Chapter 5.
This cable must be routed through the hole in the chassis. Not doing so, and allowing the cable
to be routed with the flexible disk drive and IDE cables, will raise the risk of radio frequency
interference (RFI) cross-talk.
When shutdown into its RPO state, the board draws 35 mA, well within the 50 mA capability of
the special RPO power supply.
The board can be configured completely by software (no switches or jumpers need changing).
An HP provided driver needs to be installed within the operating system (Version T.01.00).