rec.autos.simulators

ICR2 flicker in SVGA mode

Jeff Han

ICR2 flicker in SVGA mode

by Jeff Han » Wed, 13 Mar 1996 04:00:00





>>>I've just got ICR2 and I've tried running it in SVGA mode but it just flickers a hell of a lot.  I know in the manual that is says the UVBE driver may no
> .

> I had exactly the same thing on my P90 with an ATI Mach64 graphics card.
> I played around with the 3 options in the UVCONFIG program (I think they
> are "Disable VBE 2.0, Disable old Vesa BIOS and another" until the
> problem went away.  I believe the problem to be an incompatibility
> with Univbe and my ATI card since I aslo get annoying flicker in FS5 when
> I run UNIVBE as the VESA driver (I know there is an actual Mach64 driver
> for FS5 but UNIVBE gives a slightly smoother frame rate).

Yes, it is a UNIVBE 5.1a problem with certain graphics chipsets. I experience it with
my ArkLogic 2000 based video card. It happens only at 640x480. If you absolutely need
VESA 2.0 compliance to run the game (ICR2 doesn't require it, and on a 100MHz Pent.
doesn't really need it, IMHO) you have a few options:

1)      Call your video card manufacturer and check to see if there is a newer BIOS
        available for your card. If there is, check to see if it is VESA 2.0 compliant.
        If so, get it and install it. If you have VESA 2.0 on the board you will never
        have to mess with UNIVBE again.

2)      Wait for the upcoming UNIVBE 5.2 (6.0?) release and see if it finally addresses
        your card properly. Unfortunately I've heard from good sources that even in
        the latest developer beta it still doesn't support ArkLogic 2000 chips or
        Matrox Millenia Boards correctly....But, Matrox Millenia board owners can
        benefit from #1 above because I know Matrox has a VESA 2.0 compliant bios for
        their board now.

3)      Buy a new board or wait for all games to go Win95 native.

Disabling things like "VBE 2.0" in the UVConfig program are akin to not even
runing UniVBE. If you don't use VBE 2.0 then you do not benefit from 32bit protected
mode (ie 'flat') memory addressing or the linear framebuffer...the two biggest
speed enhancements that VESA 2.0 compliance give you.


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