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Today I installed Windows XP Lite in a virtual machine without video drivers. The resolutions are 800x600 to 1024x768.
When I run dxdiag (directx diagnostic) shows is using vga driver. But how is it possible? The native vga not accept
those resolutions. Does it mean SVGA?
If anyone has any ideas please would listen. Thanks.
lweb20 wrote:Today I installed Windows XP Lite in a virtual machine without video drivers. The resolutions are 800x600 to 1024x768.
When I run dxdiag (directx diagnostic) shows is using vga driver. But how is it possible? The native vga not accept
those resolutions. Does it mean SVGA?
If anyone has any ideas please would listen. Thanks.
Anyway this SVGA is pretty fast. No?
And sorry for my bad english.
This is definitely SVGA using Video BIOS i.e VBE (VESA BIOS EXTENSIONS).
source: http:// msdn.microsoft.com/en-us/library/windows/hardware/dn653353(v=vs.85).aspx
SVGA says nothing on the performance. It can be quick (to write to display memory) on emulator, or over PCIe x16 card, it may also be slow on ancient 386 machine with ISA bus.
muazzam wrote:
This is definitely SVGA using Video BIOS i.e VBE (VESA BIOS EXTENSIONS).
source: http:// msdn.microsoft.com/en-us/library/windows/hardware/dn653353(v=vs.85).aspx
Are you sure? http:// msdn.microsoft.com/en-us/library/windows/hardware/dn653353(v=vs.85).aspx and http:// msdn.microsoft.com/en-us/library/windows/hardware/ff570584(v=vs.85).aspx not talking nothing about SVGA VBE.
bluemoon wrote:
SVGA says nothing on the performance. It can be quick (to write to display memory) on emulator, or over PCIe x16 card, it may also be slow on ancient 386 machine with ISA bus.
Does writing on PCI Express card (and ISA)? I'm talking about the basic vga driver, not card driver.
MSDN wrote:... use the video BIOS to manage modes and resolutions
They most certainly are.
"Certainly avoid yourself. He is a newbie and might not realize it. You'll hate his code deeply a few years down the road." - Sortie
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