DOS ain't dead - setting refresh rate on intel 945G VBE 3.0 VGA

setting refresh rate on intel 945G VBE 3.0 VGA (Users)

posted by RayeR , CZ, 05.01.2008, 01:00

I solved the problem by VGA BIOS update.
This driver package contains latest intel VGA BIOS for 945G/965G/G3x. I used CBROM to modify my mobo BIOS image and replace old VGA BIOS (yes it was very old from 2005). Now refresh rate setting by VBEHz and other tools forks fine hmm nice to see 85Hz again. But it's not very comfortable to switch monitor and VGA between DOS and other OS sessions but good to have this chance...

Here's listing and performance of my 945G:

Generated by Martin's VGA13/VESA driver test 1.41
Host CPU id: 6F6h, host OS: DOS

VESA VBE 3.0 Intel(r) 82945G Chipset Family Graphics Chip Accelerated VGA BIOS [7872 kB]
Intel Corporation
Intel(r) 82945G Chipset Family Graphics Controller
Hardware Version 0.0
OEM software revision 1.0
VBE/AF version 0.0
27 videomodes available on this card

#0 = 160h - 0x0/0 (unsupported by VESADRV)
#1 = 161h - 0x0/0 (unsupported by VESADRV)
#2 = 162h - 0x0/0 (unsupported by VESADRV)
#3 = 163h - 0x0/0 (unsupported by VESADRV)
#4 = 164h - 0x0/0 (unsupported by VESADRV)
#5 = 165h - 0x0/0 (unsupported by VESADRV)
#6 = 166h - 0x0/0 (unsupported by VESADRV)
#7 = 167h - 0x0/0 (unsupported by VESADRV)
#8 = 168h - 0x0/0 (unsupported by VESADRV)
#9 = 13Ch - 1920x1440/8
#10 = 14Dh - 1920x1440/16
#11 = 15Ch - 0x0/0 (unsupported by VESADRV)
#12 = 13Ah - 1600x1200/8
#13 = 14Bh - 1600x1200/16
#14 = 15Ah - 1600x1200/32
#15 = 107h - 1280x1024/8
#16 = 11Ah - 1280x1024/16
#17 = 11Bh - 1280x1024/32
#18 = 105h - 1024x768/8
#19 = 117h - 1024x768/16
#20 = 118h - 1024x768/32
#21 = 112h - 640x480/32
#22 = 114h - 800x600/16
#23 = 115h - 800x600/32
#24 = 101h - 640x480/8
#25 = 103h - 800x600/8
#26 = 111h - 640x480/16

VideoModeNumber = 411Bh
5242880 kB allocated for FrameBuffer
LFB Selector = C7h
LFB PhysBasePtr = D0000000 h
Measured refresh rate = 85.60 Hz
Measured 33 FPS (FrameBuffer>VRAM)
(transfer speed 167 MB/s)

With Write Combinning for LFB enabled:

Measured 43 FPS (FrameBuffer>VRAM)
(transfer speed 217 MB/s)

hehe it's more than 10-times slower than PCI-E nvidia 7600GS

---
DOS gives me freedom to unlimited HW access.

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Complete thread:

setting refresh rate on intel 945G VBE 3.0 VGA - RayeR, 04.01.2008, 11:35 (Users)
- setting refresh rate on intel 945G VBE 3.0 VGA - Laaca, 04.01.2008, 17:27
  - setting refresh rate on intel 945G VBE 3.0 VGA - RayeR, 04.01.2008, 17:52
    - setting refresh rate on intel 945G VBE 3.0 VGA - RayeR, 05.01.2008, 01:00
      - setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - DOS386, 05.01.2008, 02:33
        setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - RayeR, 05.01.2008, 03:20
        setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - jaybur, 05.01.2008, 04:59
        setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - Laaca, 05.01.2008, 11:57
        setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - RayeR, 05.01.2008, 18:47
        setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - jaybur, 05.01.2008, 19:13
        setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - RayeR, 05.01.2008, 20:19
        setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - jaybur, 06.01.2008, 00:47
        setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - RayeR, 06.01.2008, 00:54
        setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - Rugxulo, 06.01.2008, 05:01
        setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - jaybur, 06.01.2008, 06:16
        setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - RayeR, 06.01.2008, 13:50
        setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - DOS386, 08.01.2008, 01:53
        setting refresh rate on intel 945G VBE 3.0 VGA 0x0/0 useful - RayeR, 08.01.2008, 14:39