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- From: jorma@stimulus.hut.fi (Jorma Laaksonen)
- Subject: Xfree and Cirrus GD 6410/6420 VGA Chips ??
- Message-ID: <JORMA.92Nov16132952@stimulus.hut.fi>
- Sender: usenet@nntp.hut.fi (Usenet pseudouser id)
- Nntp-Posting-Host: stimulus.hut.fi
- Reply-To: Jorma.Laaksonen@hut.fi
- Organization: Helsinki University of Technology, Finland
- Distribution: comp
- Date: 16 Nov 92 13:29:52
- Lines: 27
-
-
- Hi.
-
- Is anybody familiar with Cirrus Logic VGA chips GD6410 and GD6420 ??
-
- The documentation of my 386 laptop says it contains a GD6420 chip,
- whereas the VESA BIOS reports a GD6410. The generic Xmono driver
- works fine, but xfree86 doesn't seem to contain a proper VGA-driver.
- The et3000 and et4000 drivers almost work: using et3000 produces a
- X-cursor which occupies about one fourth of the 640x480 lcd screen,
- et4000 produces a display with dark vertical stripes.
-
- Under DOS the VGA card supports 640x480 lcd with 64 grayscales,
- external monitor with 800x600 256 colors, or 1024x768 16 colors. I've
- been told it contains 512 kB video ram. The clock.exe reports
- approximate frequencies 25 28 20 40 MHz.
-
- Linux boot nor jesperf@daimi.aau.dk's whichvga.exe don't recognize
- the chip to be a Cirrus chip. I suppose this is because they both are
- looking for a CL-GD 510/520/610/620 chip. The recognition of those
- chips doesn't seem to be compatible with that of GD6410/6420.
-
- So, if anyone has any experience or documentation on the Cirrus chips,
- I would appreciate sharing it with me.
-
- Jorma
-
-