DOS ain't dead

nVidia-disable LCD scaling, refresh rates (Users)

posted by RayeR , CZ, 12.01.2009, 10:04

Hi, I found easy way how to control on-chip scaler:

mov ax,4F14h ;VESA VBE OEM function
mov bl,2     ;Subfunction 02 = Set Panel Expansion/Centering
mov bh,1     ;00 = Return Current Setting, 01 = Set Centering/Expansion
mov cx,0000h ;Exp. mode: 00 = Scaled, 01 = Centered 1:1, 02 = Left Corner 1:1
int 10h      ;call VGA/VBE service
int 20h      ;exit

This should work on all nVidia cards but it is not exactly what I'm looking for. It always sends native resolution to LCD - if no expansion then just black borders are added around instead lowering resolution. But better than nothing. I can use it in batch files to customize mode for different programs.

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DOS gives me freedom to unlimited HW access.

Complete thread:

• nVidia-disable LCD scaling, refresh rates - RayeR, 07.01.2009, 14:54 (Users)
  • nVidia-disable LCD scaling, refresh rates - rr, 07.01.2009, 20:25
    • nVidia-disable LCD scaling, refresh rates - RayeR, 08.01.2009, 00:45
      • nVidia-disable LCD scaling, refresh rates - RayeR, 12.01.2009, 10:04
        • nVidia-disable LCD scaling, refresh rates - RayeR, 15.01.2009, 12:21
  • nVidia-disable LCD scaling, refresh rates - Laaca, 07.01.2009, 21:21
    • nVidia-disable LCD scaling, refresh rates - RayeR, 08.01.2009, 00:49
      • VBE3TEST - RayeR, 09.01.2009, 02:38
        • VBE3TEST - RayeR, 09.01.2009, 11:49
        • VBE3TEST - Laaca, 10.01.2009, 12:02
          • VBE3TEST - RayeR, 10.01.2009, 23:26