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Question on PCI Video card
- To: Mailing List Recipients <pci-sig-request@znyx.com>
- Subject: Question on PCI Video card
- From: Pablo AGHEMO <paghemo@ctinet.com.ar>
- Date: Mon, 26 May 1997 16:09:10 -0300
- Resent-Date: Mon, 26 May 1997 16:09:10 -0300
- Resent-From: pci-sig-request@znyx.com
- Resent-Message-Id: <"z-igz1.0.Qa1.NIXYp"@dart>
- Resent-Sender: pci-sig-request@znyx.com
Hello, it's me again....
I have a Pentium 100 Mhz with the Triton chipset and the
video controller is a PCI add-on card with the Trident 9440
chip. I know that this card is memory mapped at the location
F0000000, and it is 2 Megabytes long.
1) Does anyone know how the video RAM is arranged in this
memory space? I have tried to poke some values using C++
but when I do it in some locations the PC hangs.
2) How fast should I be able to write to this Video RAM? I
wrote a short C program that writes several times to a certain
location and I measured only 3,200,000 bytes per second. Is
that the fastest I can do it?
Thanks in advance!!!!
Sincerely,
Pablo Aghemo
paghemo@ctinet.com.ar
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