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Subject: Incompatibility FAQ: Cirrus Video Cards & Creative Sound cards

This article was archived around: 21 May 2006 04:22:46 GMT

All FAQs in Directory: games/incompatibility
All FAQs posted in: comp.sys.ibm.pc.soundcard.misc
Source: Usenet Version

Archive-name: games/incompatibility/cirrus-soundblaster Posting-Frequency: Monthly Last-Modified: 27 August 1996 Version: 3.01 URL: http://www.tcp.co.uk/~blades
Cirrus Logic Video cards and Creative Labs Sound Card Incompatibility FAQ ========================================================================= by Gareth blades (gareth@blades.tcp.co.uk) The latest version of this ASCII document can be obtained via ftp from rtfm.mit.edu as :- /pub/usenet/news.answers/games/incompatibility/cirrus-soundblaster This FAQ is posted monthly to comp.sys.ibm.pc.soundcard.misc, comp.answers, and news.answers. ------------------------------------------------------------------------- ======== CONTENTS ======== 1) What is the problem? 2) What is the cause? 3) What video cards are effected? 4) What sound cards are effected? 5) How to overcome the problem 6) What programs are effected? =============================================================================================== 1) What is the problem? ======================= This incompatibility causes crackling in the sound during video animations in high resolution modes in DOS mode. The incompatibility also seems to cause the sound card to produce a screeching sound when it is being initialised by a particular sound card driver. Games that I know use this driver include:- Doom (screeches at start and end of game) Doom 2 ("") Descent ("" and when switching between the map and the game) I have not found any way of getting rid of this problem. 2) What is the cause? ===================== There is an incompatibility between some Creative Labs sound cards (the SB16 in particular) and Cirrus Logic based video cards. I have had various reports of non Creative Labs sound cards being effected and therefore I suspect the problem is due exclusively to Cirrus Logic 3) What video cards are effected? ================================= All cirrus logic based video cards are effected. This also includes:- Orchid Kelvin 64 (Cirrus Logic 5434) Diamond Speedster Pro VLB Genoa 8500 (Cirrus Logic 5429) 4) What sound cards are effected? ================================= It seems to be mostly the Creative Labs sound cards which are effected. The list below shows other cards which have been reported as having the same problem:- PAS16 MediaVision Jazz 16 GUS ACE Ess audio card 5) How to overcome the problem ============================== I have not found a way of getting rid of the screeching when the sound card initialises. The crackling while animations are playing can be got rid of though. To overcome the problem is relatively easy. You simply load a dos based VESA driver for the video card. Cirrus have some drivers on their FTP site which is ftp.cirrus.com. I personally use a program called Scitech Display Doctor which is a program that can be used for many different video cards. It is small and apparently faster than the available Cirrus ones although it is shareware and does nag when you run it. The current version of SDD is 5.2. It costs about $30 to register and supports the Vesa 2 standard which means it can make some games run a lot faster. SDD 5.2 can be found at http://www.scitechsoft.com 6) What programs are effected? ============================== The incompatibility is with the VESA bios on the video card and therefore it only effects games which use VESA. This includes all games which run in SVGA modes. The following games are known to use VESA. * = VESA driver only used in high resolution graphics mode The 7th Guest * Simcity 2000 * Theme Park * Magic Carpet * The Need For Speed Fatal Racing Nascar Racing Star Trek the Next Generation * Wing commander 4 Transport Tycoon Transport Tycoon Deluxe Links 386 Pro Under a Killing Moon Command and Conquer US Naval Fighters (and sequels) * System Shock CD * Flight Simulator 5.0 Mechwarrior 2 (the console screen in particular) Warcraft 2 Tie Fighter X-Wing Since producing this FAQ I have upgraded my system and no longer have a Cirrus Logic based video card. Therefore I rely on other peoples contributions to update this FAQ. There are also a new type of game which require a Vesa driver supporting the Vesa 2 standard. One such game is the 11th Hour. It comes with its own copy of UniVbe to run the game. -- ------------------------------------------------------------ Gareth Blades (home) gareth@blades.tcp.co.uk (home) gblades@iee.org (work) gblades@as.neag.co.uk http://www.tcp.co.uk/~blades/