Video Display Subsystem; Sound Subsystem - Texas Instruments TravelMate 5000 Series Maintenance Manual

1.3.6
The initial offering of the TM5000 Series Notebook Family contains a
built-in TSTN (Triple Super Twist Nematic) active matrix color LCD with
CCFT (Cold Cathode Fluorescent Tube). The LCD has a VGA compatible
resolution of 640 by 480 pixels. All members of the TM5000 family support
simultaneous LCD and external VGA display at 640 x 480 resolution.
At the heart of the notebook's video subsystem is a powerful video engine,
the Cirrus Logic CL-GD7542 GUI-accelerated Super VGA LCD Controller
with MotionVideo
engine include:
The video subsystem includes a 2 MB RAM memory, 32-bit DRAM bus, and
separate display and memory clocks. An additional frame buffer/accelerator
DRAM increases the available memory band width for CPU accesses. The
video section also uses additional levels of write FIFOs, a read cache, page
mode DRAM and full 32-bit bus access to produce a high performance video
system.
1.3.6.1
The video engine in the notebook is capable of operating at dot clock rates
programmable up to 85 MHz at 5.0 V or 65 MHz at 3.3 V and supports
standard VGA and VESA high-resolution extended modes at refresh rates
up to 75 MHz. The internal palette can be configured as an
industry-standard RAMDAC to provide a palette of 256K colors or
configured for direct color displays of 32K, and 65K colors.
In addition, the video engine supports the following Super VGA modes:
1.3.7
All members of the TM5000 series include a Jazz 16 Sound chip set which
supports stereo digital recording and playback, microphone and line input,
automatic gain control, 20-voice FM music synthesizer, 44.1 Khz audio
recording and playback, built-in file compression/decompression, and
built-in power amplifier with volume control. Jazz 16 software supplied with
the system provides for computer control of all sound features.
1-18 General Description

Video Display Subsystem

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implemented on the Main Board. Features of this video
32-bit Block Transfer Engine with GUI Acceleration
640 x 480 LCD support
True-color capability
Motion-Video architecture with live video overlay
High Resolution VESA and Extended Modes
640 x 480 with up to 65K colors on LCD and CRT
800 x 600 with up to 65K colors on LCD and CRT
1024 x 768 with up to 256 colors on CRT
1280 x 1024 with up to 256 colors on CRT (interlaced)

Sound Subsystem