TITLE
    Cirrus Logic GD5434 Display OPENSTEP Driver Overview
Article ID:
Created:
Modified: 		72229
12/15/98
12/15/98
TOPIC

    This article discusses a device driver for OPENSTEP versions 4.0 through 4.2.

DISCUSSION

    Driver: Cirrus Logic GD5434
    Last Update: December 18, 1997

    Availability Information

    A version of this driver is on the OPENSTEP CD-ROM
    An updated release version of this driver, version 4.03, is avaiable on Apple's FTP servers at:
    ftp://ftp.info.apple.com/Apple_Support_Area/Apple_Software_Updates/MultiCountry/Enterprise/openstep/drivers/released/CLGD5434.pkg.compressed

    Driver Name / Installer .pkg: CirrusLogicGD5434DisplayDriver
    Driver Type: Display
    Driver Scope: Generic-Chipset
    Supported Components: Cirrus Logic GD5430, Cirrus Logic GD5434, Cirrus Logic GD5436, Cirrus Logic GD5446
    PC Bus / Interface Supported by Driver*: Integrated, PCI, VL-Bus

    General Overview notes: This driver is intended to support on-board implementations of GD5434 as well as add-on adapters.

    Supported Products / Add-on Adapters:
    Diamond SpeedStar 64 (PCI)
    Orchid Kelvin 64 (with GD5434)

    Supported Products / Systems (ie integrated into PC System):
    Elonex WS4100
    Intel Premier (with integrated GD5434)
    HP Vectra XM Series3 (not tested but reported to work)

    Special Features of Driver / Driver Notes:
    Because this chip has an integrated RAMDAC with only an 8 bit palette, Preferences's Brightness slider (and hardware gamma correction in general) doesn't work for any non-8 bit modes. Also 32-bit color modes (where supported) look dark. There is no fix for these problems.

    This device driver provides information in the Configure application's help panel. Choose Info>Help from the Configure menu and scroll down to find this device driver's help topic.

    Display Driver Details

    Supported Connectors: 15-pin High Density (VGA)
    Access Mode: Linear Framebuffer
    Adapter Memory: 1MB VRAM, 2MB VRAM

    Display Modes (Number in () after resolution indicates frame buffer size required)

    32 Bit Color Modes*:
    640x480 (2MB+), 800x600 (2MB+)

    16 Bit Color Modes*:
    1024x768 (2MB+), 1152x864 (2MB+), 800x600 (1MB+)

    8 Bit Color / Greyscale Modes*:
    1024x768 (1MB+), 1280x1024 (2MB+), 800x600 (1MB+)

    Known Problems

    Cirrus Logic GD5430 and GD5436 are not supported but is reported to work with this driver.

    The GD5436 & GD5446 do not support 32 bit color modes. Only 8 & 16 bit modes are available for adapters based on these chips.

    Driver Version Notes

    3.31 - Added support for PCI cards and 8 bit color
    4.00 - Released on OPENSTEP 4.0 User CD-ROM
    4.01 - Added support for GD5446 chipset

    * - Indicates information that is inclusive of the entire capability of this driver. Not all devices supported by this driver may include all features listed.

    Product Vendor
    Cirrus Logic, Inc.
    3100 West Warren Avenue
    Fremont, CA 94538
    510-623-8300
    fax: 510-252-6020

    URL: www.cirrus.com

Document Information
Product Area: Apple Software
Category: OPENSTEP
Sub Category: Drivers
Keywords:

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