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Appendix F ATI RAGE PRO AGP Graphics Cards
Compaq Personal Computers
Original - April 1998
F-6
F.5 MONITOR POWER MANAGEMENT CONTROL
This controller provides monitor power control for monitors that conform to the VESA display
power management signaling (DPMS) protocol. This protocol defines different power
consumption conditions and uses the HSYNC and VSYNC signals to select a monitor’s power
condition. Table F-5 lists the monitor power conditions.
Table F–5.
Monitor Power Management Conditions
Table F-5.
Monitor Power Management Conditions
HSYNC VSYNC Power Mode Description
Active Active On Monitor is completely powered up. If activated, the inactivity
counter counts down during system inactivity and if allowed to
tiemout, generates an SMI to initiate the Suspend mode.
Active Inactive Suspend Monitor’s high voltage section is turned off and CRT heater
(filament) voltage is reduced from 6.6 to 4.4 VDC. The Off mode
inactivity timer counts down from the preset value and if allowed to
timeout, another SMI is generated and serviced, resulting in the
monitor being placed into the Off mode. Wake up from Suspend
mode is typically a few seconds.
Inactive Inactive Off Monitor’s high voltage section and heater circuitry is turned off.
Wake up from Off mode is a little longer than from Suspend.
F.6 CONNECTORS
There are three connectors associated with the graphics subsystem; the display/monitor
connector, the ATI Multimedia Channel (AMC) connector (which includes the VESA Standard
Feature Connector (VSFC)), and a SODIMM connector for frame buffer memory expansion.
NOTE:
The graphic card’s edge connector mates with the AGP connector on the system
board. This interface is described in chapter 4.
F.6.1 MEMORY EXPANSION CONNECTOR
A memory expansion connector is included allowing the expansion of frame buffer memory. This
connector accepts an industry-standard 144-pin SODIMM. The SODIMM socket on the AGP 1X
card has a 2-MB SGRAM module installed as standard. The SODIMM socket on the AGP 2X
card is not populated and can accept a 4-MB SGRAM module for expansion to eight megabytes.