Tseng Qtec VGA 1024, Installation Manual

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UNDERSTANDING YOUR QTEC VGA1024 ADAPTER
The Qtec VGA1024 consists of the following key components and
functions:
1. The Tseng Labs ET3000-AX video ASIC chip (CRTC)
2. The memory
3. The digital-to-analog converter chip
4. Oscillators
5. Video BIOS
6. VGA-SYNC ROM
7. PC bus connector
The Tseng Labs ET3QQQ-AX video ASIC . . chip-.(.CRTC.i
This is the heart of the Qtec VGA1024 adapter. It defines the
card's hardware compatibilities, resolutions, speed and
functionalities. The rest of the components on the board are
peripherals to the ET3000-AX chip.
The Memory
a) Memory size
Your Qtec VGA1024 adapter consists of either 256KB DRAM or
512KB DRAM. The size of memory on the adapter determines the
graphics resolutions and number of colors the adapter
provides.
The following resolutions/colors requires 256KB DRAM
. 320x200 in 256 colors
. 640x350 in 16 colors
. 640x480 in 16 colors
. 800x600 in 16 colors
The following resolutions/colors requires 512KB DRAM
640x480 in 256 colors
. 800x600 in 256 colors
. 1024x768 in 16 colors
b) Memory type and speed
Qtec VGA1024 uses 64Kx4 (4464) DRAM. 8 pieces of 64Kx4 DRAM
will comprise 256KB and 16 pieces of 64Kx4 DRAM will comprise
512KB.
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