RE: X11 on TP 755 CX

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From: Jeffrey Friedl (jfriedl_at_nff.ncl.omron.co.jp)
Date: Fri Feb 09 1996 - 14:23:32 EST

|> I have a TP 755 CX, 24 Mo RAM, 1,2 Go HD, Mwavw processor, and 800x600
|> screen. I am currently installing Linux on that thinkpad. Everythink is
|> running well except that I don't succeed to run X11 in 800x600. I just
|> run it in 640x480.

Otto J Helweg <ottoman_at_neosoft.com> replies
|> You need a special Western Digital driver (which is only available from
|> IBM) and may not be available for the TP755CX for Linux.

I don't know where you got this idea. I've been running 800x600 Linux/X11 on my
755cx for months.

The latest (as of this summer, mine is dated Jul 23 1995) version of
XF86_SVGA has support for the 755CX's chipset, WD90C24A2.

One thing Linux's X won't do is put the chipset into 800x600 mode -- you
have to get it there yourself. Run the DOS command "PS2 MODE3X ON" and then
boot via LOADLIN. The console will be screwed up and act funny. But once X
starts, it should be fine.

My /etc/XF86Config appended, FYI.
        Jeffrey
----------------------------------------------------------------------------
Jeffrey Friedl <jfriedl_at_omron.co.jp> Omron Corp, Nagaokakyo, Kyoto 617 Japan
See my Jap<->Eng dictionary at http://www.wg.omron.co.jp/cgi-bin/j-e
                           and http://enterprise.ic.gc.ca/cgi-bin/j-e

--------------------------------------------------------------------------
Section "Files"
    RgbPath "/usr/X11R6/lib/X11/rgb"

    FontPath "/usr/X11R6/lib/X11/fonts/misc/"
    FontPath "/usr/X11R6/lib/X11/fonts/Type1/"
# FontPath "/usr/X11R6/lib/X11/fonts/Speedo/"
    FontPath "/usr/X11R6/lib/X11/fonts/75dpi/"
    FontPath "/usr/X11R6/lib/X11/fonts/100dpi/"
EndSection

Section "ServerFlags"
EndSection

Section "Keyboard"
    Protocol "Standard"
    AutoRepeat 500 5
EndSection

Section "Pointer"
    Protocol "PS/2"
    Device "/dev/mouse"
    BaudRate 9600
    SampleRate 150
    Emulate3Buttons
EndSection

# **********************************************************************
# Monitor section
# **********************************************************************

Section "Monitor"
    Identifier "IBM ThinkPad 755CX"
    VendorName "IBM"
    ModelName "ThinkPad 755CX"

    HorizSync 30-40
    VertRefresh 50-60

    Mode "640x480"
        DotClock 25.175
        HTimings 640 664 760 800
        VTimings 480 491 493 525
    EndMode

    Mode "800x600"
        DotClock 36
        HTimings 800 824 896 1024
        VTimings 600 601 603 625
    EndMode
EndSection

# **********************************************************************
# Graphics device section
# **********************************************************************

Section "Device"
    Identifier "WD90C24A2"
    VendorName "Unknown"
    BoardName "Unknown"
    Chipset "wd90c24"
# Option "slow_dram" # Set Mclk to 47.429
# Option "med_dram" # Set Mclk to 49.219
# Option "fast_dram" # Set Mclk to 55.035

    VideoRam 1024
    clocks 26.22 28.32 54.77 34.67
    clocks 28.88 74.59 59.94 77.18
    clocks 30.33 34.24 72.43 42.67
    clocks 38.36 48.26 40.50 42.67
    clocks 42.66
EndSection

# **********************************************************************
# Screen sections
# **********************************************************************

Section "Screen"
    Driver "SVGA"
    Device "WD90C24A2"
    Monitor "IBM ThinkPad 755CX"
    Subsection "Display"
        Depth 8
        Virtual 1024 768

        Modes "800x600" "640x480"
        ViewPort 0 0
    EndSubsection
EndSection

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