Hardware driver for Cirrus Logic chips: CL-GD542x, CL-GD543x, CL-GD544x, CL-GD546x, CL-GD5480, including qemu emulated CL-GD5446. With 2Mb+ cards 32-bit color modes are supported., Windows NT clones - ALL of them: Debug version. 2009.01.03: IBM Graphics driver works with any IBM EGA/VGA-compatible cards (mono, 16, 256 colors)., Windows NT 4. Download for free Everest ES831610.19.59.203 microphone Driver for Windows 10 (x64).

Today I downloaded the lastest driver from Cirrus website but no luck - CS4207 Windows 7 (32/64-bit) and Windows 8 (32/64-bit) Driver 3/2013, v6.6001.1.39: 107 KB. I would like to contact CirrusSupport, but I don't know how.

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This project started on May 2004.

Overview

Key features :

The main IDEA of the project was taken from standard XP/2003 VGA.SYS display driver with generic VESA BIOS Extensions (VBE) 1.02/2.00/3.00+ support.
It is a standard Windows NT™ Video Display Driver.
It supports ALL of MS Windows NT™ Family (3.x,4.0,2000(5.0),XP/XPMCE/WFLP 32-bit(5.1),2003 Server 32-bit(5.2)).
Windows Preinstallation Environment (WinPE) is also supported.
It supports a wide range of videocards emulated via virtualization software: Bochs, QEMU, VMware, Innotek VirtualBox, Microsoft VirtualPC.
For proper operation my driver expects that your video card's BIOS is 100%-compatible with VESA Video BIOS extensions specification. Nowadays there are many video cards that don't fully supports INT10 interface, which is provided by VESA/VBE standard (See VBE FAQ below for details).
Supports VBE 2.00+ compliant PCI/AGP/PCI-E video cards with linear frame buffer.
Partially supports VBE 1.x compliant ISA/EISA/MCA/VLB/PCI video cards with linear frame buffer (only S3, Tseng Labs, Cirrus Logic, Trident chips).
Under Windows XP and later, it supports VBE 1.x ISA/EISA/MCA/VLB/PCI video cards with bank switching (Like Intel 810/815 cards, old ISA/MCA/VLB-bus cards). In other cases it is limited to 320x200x8bit mode.
Supports VBE-incompatible EGA/VGA video cards (old ISA/EISA/MCA-bus cards) with bank switching limited to monochrome and 320x200x8bit modes via additional VGA13H driver.
For usermode part of the driver it uses standard framebuf.dll supplied with ANY Windows NT™.
256color(8bit), 15bit (R5G5B5), 16bit (R5G6B5), 24bit, 32bit true color modes support.
From 320x200x8bit to every resolution which your video card's BIOS supports.
Video mode filtering using registry (organized like ATI's DALRestrictedModesBCD key). You can disable unneeded modes using this technique.
Under Windows NT 4.00™ and later, it supports USWC (Uncached Speculative Write Combining) using processor's MTRR registers.
Under Windows 2000™ and later, it supports Advanced Power Management (i.e. Stand by, Hibernation), Monitor & Child Devices Detection. Legacy-type drivers and NT3/NT4 support for these features exist, but it is limited.
Under Windows 2000™ and later, it supports internal Windows GDI Acceleration using shadow buffer. Beta support for Windows NT 4.00™ exists via modified version of framebuf.dll.
VBE 3.00+ support: refresh rate switching (3Dfx, nVidia, Intel video cards for example). Note that in some cases system restart IS REQUIRED for successful change of refresh rate in Windows NT 4.00™/2000™.
Under Windows 2000™ and later, it supports internal Windows support for accelerated Mode-X modes with width of 320 pixels via MODEX.DLL.

Planned features :

Windows NT 3.1 support (in beta now, no 8 bit modes support)
Windows Alpha, MIPS, PowerPC architecture support
Feature to install the driver without reboot
Shadow buffer acceleration support for NT4 (in beta now)
ICM (color management), rotation and zooming support
More than one device for output (display, video out device, flat panel)
2-bit (mono) and 4-bit (16 colors) support for testing purposes only
Old adapters support like EGA, CGA, Hercules etc. for testing purposes only :)

Download drivers

This driver is intended for using in case when your have some new or unknown video card(s) and you don't have drivers for it. It's better to contact manufacturer of your video card or search THE WEB for the drivers. ONLY if you finally cannot find driver for your video card I recommend you to use mine (vbemp.sys). My driver does not provide any kind of 3D hardware acceleration (DirectX & OpenGL). For this purpose third-party libraries can be used.

If your card made by AMD-ATI Technologies and this card is detected as two devices ('Radeon xxxx' and 'Radeon xxxx Secondary') only 'Manual' or 'legacy' version may work with it.

My driver does NOT support multiple video cards and/or displays connected simultaneously and this feature is NOT planned.

My driver does NOT support any editions of Windows Vista/Windows 7 and newer.

Before installing VBEMP.SYS I recommend removing any display drivers installed including any previous or newer VBEMP driver versions and switching to the standard VGA mode 640x480x16colors.

System requirements :

Windows NT 3.1 - latest Service Pack (SP3) is recommended
Windows NT 3.5 - latest Service Pack (SP3) is recommended
Windows NT 3.51 - latest Service Pack (SP5) is recommended, AGP/PCI-E cards may not work without special update *
Windows NT 4.0 - latest Service Pack (SP6a) is recommended, AGP/PCI-E cards may not work without special update *
Windows 2000 - latest Service Pack (SP4) is recommended
Windows XP - latest Service Pack (SP3) is recommended **
Windows 2003 Server - latest Service Pack (SP2) is recommended **

* If you have problems installing VBEMP or any other driver in Windows NT 4.0 (and NT 3.51) - blank screen, system hang after restart - read this MS Article. Details here: MSKB: AGP Video Support for Windows NT 3.51 and 4.0 (Q174567). Install Service Pack 3 or later for Windows NT 4.0, and Q174567 Hotfix for Windows NT 3.51 to solve this problem.

** Windows XP/Windows 2003 version is not necessarily needed because basic functionality of it is also included in standard VGA.SYS. Comparing to my driver, VGA.SYS:

Supports 4-bit (16 colors) modes 640x480, 800x600
VESA BIOS modes support is limited for some cards:
Cannot switch to modes less than 640x480
Cannot switch display refresh rates using VBE 3.0 standard
Write Combining (USWC) acceleration is not supported
15-bpp R5G5B5 modes are skipped

OS	Version	Description	Link
Windows NT, Windows 2000, Windows XP, Windows 2003, Windows PE x64/ia64	Release version beta 2019.12.01	Universal VBE30 & VBE20 versions., Universal VBEMP** control panel extension.	[?],[?],[?]
Windows NT, Windows 2000, Windows XP, Windows 2003, Windows PE x64/ia64	Release version beta 2015.01.01	Universal VBE30 & VBE20 versions., Universal VBEMP** control panel extension.	[?],[?],[?]
Windows XP, Windows 2003, Windows PE x64/ia64	Release version

Cirruslogic Driver