Samsung Sens 800
The Samung Sens 800 notebook is a Intel Pentium machine with either 75 or
90MHz. It can have up to 40MB of RAM and DSTN or TFT display. It uses the
Cirrus CLGD7543 SVGA chipset. It also has two PCMCIA slots and a builtin
My configuration is as follows:
- 75MHz Pentium CPU
- 40MB RAM
- 2GB harddisk
- TFT display (640x480 pixel)
Installing it was quite easy because I have a PCMCIA SCSI CDROM for it and
could do it from CDROM right away. I used RedHat-5.1 for the first install
and updated to RedHat-5.2 lately. So far no real problems.
The built-in soundcard is somewhat strange. It is detected by "normal"
sounddrivers as SoundBlaster 1.0 or 2.0 which means 8 bit mode, mono,
just 22kHz sampling frequency and no mixer. After browsing through the net I
found a patch for sounddrivers in 2.0.* kernels which works quite well. With
this patch you can have either 8 bits at 44.1kHz or 16 bits at 22kHz and the
mixer is supported. It is still mono because the chipset does not support
Setting up XFree86 properly took me about three months (with quite some
time between tries ;) The problem is two fold:
- Using wrong pixel clocks with LCD displays is fatal! Not only the SVGA
chipset, in this case CLGD7543, is a digital chip but also the display's
chipset! I.e. when using wrong clocks not only the chipset may crash, the
displays's logic may also render your machine dead or useless!
- The XFree86 Cirrus CLGD7543 driver has a bug which prevents 16bpp mode
from working. I found a patch on the net which fixes this and has to be
applied to the XFree86 link-kit. After that the linear addressing mode works
and therefor 16bpp work too! Great! I have not yet managed to get 24bpp to
work but that's not that important especially since the TFT of the Sens800
only supports 18bpp. The patch is for XFree86-3.3.1 or earlier but can nearly
easily be applied to later releases.
And here some references in short:
- Patch for sounddriver found in 2.0.* kernels
(I forgot the original author, sorry)
- Patch for XFree 3.3.* to get linear
addressing to work (and with this 16bpp)
(The patch was done by Samuel Guyer, email@example.com)
- XFree-3.3.3 binary for those not willing to
do the patch themself ;)
- And here is my XF86Config I now use which
gives me stable 8bpp and 16bpp support.