Video Memory; Zoomed Video - Compaq Armada e500 Series Reference Manual

TV Display Modes
The RAGE Mobility-P supports the following video modes when using an NTSC or
PAL television or monitor:
TV Display Modes (any Color Depth Without Panning)
Mode NTSC (60 Hz)
320 × 350 yes
320 × 400 yes
320 × 480 yes
360 × 400 yes
400 × 600 yes
512 × 384 yes
640 × 350 yes
640 × 400 yes
640 × 480 yes
720 × 350 yes
720 × 400 yes
720 × 480 yes
704 × 480 yes
800 × 600 yes
512 × 768 yes
640 × 768 yes
848 × 480 yes
1024 × 768 yes
1024 × 600 as 1024 × 600

Video Memory

The video system uses 8 MB (Armada E500) or 4 MB (Armada V300) of 125-MHz
SDRAM as graphics memory. The RAGE Mobility-P uses a 64-bit data path to display
memory. Display memory control signals are derived from the integrated clock
synthesizer's memory clock. The RAGE Mobility-P serves as a DRAM controller for
the video display memory. It handles DRAM refresh, fetches data from display memory
for display refresh, interfaces the CPU and 82443BX to display memory, and supplies
all necessary DRAM control signals. For the Armada E500 and Armada V300, self-
refreshing DRAMs are used, eliminating the need to provide refresh-clocking signals
during suspend-to-RAM.

Zoomed Video

Zoomed Video is a way to get real-time video into the video controller without using up
bus bandwidth or CPU cycles. It utilizes a 16-bit video port on a video controller that
accepts YUV data, the same style port that is used for the VESA advanced feature
connector in some desktops.
Table 7-5
PAL (50 Hz)
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
as 1024 × 600
Video/Graphics Subsystem 7-11