Date: Wed, 27 Sep 1995 10:36:57 +0100 (MET) From: Olof Johansson <offe@dawnrazor.campus.luth.se> To: "Amancio Hasty Jr." <hasty@rah.star-gate.com> Cc: Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de>, hackers@freebsd.org Subject: Re: vgalib for FreeBSD! Message-ID: <Pine.BSF.3.91.950927103143.576R-100000@dawnrazor.campus.luth.se> In-Reply-To: <199509270537.WAA13001@rah.star-gate.com>
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On Tue, 26 Sep 1995, Amancio Hasty Jr. wrote:
> The biggest problem with the svgalib is its lack of support for svga
> cards. For instance, the last time that I checked there was no
> support for S3 cards . I guess a good starting point will be to
> port whatever is available then include a lot of the XFree86 init
> and graphic routines. The effort is almost not worth it -- at least
> from my point and view . I suggest doing a net search for a better package.
Since svgalib is the only graphics package for linux (or any other
pc-unix) I've seen I don't have too much to compare it with.
I think that a fairly easy-ported, not-too-good packages is better than
none though.
I have an unsupported S3 card myself. :-( (#9 GXE)
These are the supported chipsets (from the README, sorry for the long list):
VGA and compatibles
320x200x256, and the series of 16-color and non-standard
planar 256 color modes supported by VGAlib, as well as
720x348x2.
Cirrus Logic GD542x/3x
All the modes, including 256 color, 32K/64K color,
16M color (3 bytes per pixel) and 32-bit pixel 16M color
modes (5434). Some bitblt functions are supported.
The driver doesn't work with mode dumps, but uses a SVGA
abstraction with mode timings like the X drivers.
Tseng ET4000/ET4000W32(i/p)
Derived from VGAlib; not the same register values.
ET4000 register values are not compatible; see et4000/README.
Make sure the colors are right in hicolor mode; the vgatest
program should draw the same color bars for 256 and hicolor
modes (the DAC type is defined in et4000.regs or the dynamic
registers file).
ET4000/W32 based cards usually have an AT&T or Sierra
15025/6 DAC. With recent W32p based cards, you might have
some luck with the AT&T DAC type.
If the high resolution modes don't work, you can try
dumping the registers in DOS using the program in the
et4000 directory and putting them in a file
(/etc/vga/libvga.et4000 is parsed at runtime if DYNAMIC
is defined in config.h).
640x480x256, 800x600x256, 1024x768x256,
640x480x32K, 800x600x32K, 640x480x16M, etc.
Reports of ET4000/W32i/p functionality are welcome.
There may be a problem with the way the hicolor DAC register
is handled; dumped registers may use one of two timing
methods, with the value written to the register for a
particular DAC for a hicolor mode (in vgahico.c) being
correct for just one of the these methods. As a consequence
some dumped resolutions may work while others don't.
Trident TVGA 8900C/9000 (and possibly also 8800CS/8900A/B)
Derived from tvgalib by Toomas Losin.
640x480x256, 800x600x256, 1024x768x256 (I and NI)
Might be useful to add 16-color modes (for those equipped
with a 512K TVGA9000).
Oak Technologies OTI-037/67/77/87
Driver by Christopher Wiles; includes 32K color modes
for OTI-087. See README.oak.
ATI Mach32
The alpha driver by Michael Weller supports all BIOS-defined
modes. However, non-Type 2 DAC's are untested. Check out
README.mach32 (and README.config). Do send feedback.
S3
The driver is not complete, but should work on a number
of cards/RAMDACs, and 6408x480x256 should be work
on most card. The best support is for a 801/805 with
AT&T20C490-compatible RAMDAC, and S3-864 + SDAC.
Clocks and Ramdac lines in config file supported.
Clocks should be the same as in XFree86. Supported
ramdac IDs:
Sierra32K, SDAC, GenDAC, ATT20C490, ATT20C498
Example:
Clocks 25.175 28.3 40 70 50 75 36 44.9 0 118 77 31.5 110 65 72 93.5
Ramdac att20c490
ARK Logic ARK1000PV/2000PV
Full support, limited RAMDAC support. Only ARK1000PV
tested. Supports Clocks and Ramdac lines in config file.
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