[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Devices using VGA Palette snooping?
- To: Mailing List Recipients <pci-sig-request@znyx.com>
- Subject: Re: Devices using VGA Palette snooping?
- From: "John R Pierce" <pierce@scruznet.com>
- Date: Thu, 26 Sep 1996 23:53:04 -0700
- Resent-Date: Thu, 26 Sep 1996 23:53:04 -0700
- Resent-From: pci-sig-request@znyx.com
- Resent-Message-Id: <"SqMox3.0.NR5.PptIo"@dart>
- Resent-Sender: pci-sig-request@znyx.com
Robert Elliott <relliott@hobbit.eng.hou.compaq.com> asks...
>
> Can anyone identify some graphics devices which actually use the
> PCI VGA Palette Snoop feature?
>
Yeah, a whole pile of ISA video-in-a-window and capture cards that used the
original VGA Feature connector, such as the C&T "PC-TV" chips, the Sigma
Designs Reel Magic card, etc.
If used with a PCI VGA, the PCI VGA has to be put into snoop mode so that the
RAMDAC writes make it thru to the duplicate RAMDAC on these ISA cards.
-jrp
6 0