README for X11R7.5 on LynxOS

Accessing X11R7.5 manual pages

Include /usr/X11R6/man in the MANPATH environment variable or add the directory /usr/X11R6/man to /usr/Lib/man.config

System tuning

#define X_WINDOWS

  # cd /
  # bash /usr/X11R6/lib/X11/etc/MTRR-Lynx.shar
  # cd sys/drivers/mtrr
  # make install

  I:../drivers/mtrr/mtrr.cfg

     # cd /sys/lynx.os
     # make install
     # reboot -N

Mouse support in X11R7.5

X11R7.5 includes support for PnP mice (see also Mouse Support in X11R7.5). The current LynxOS TTY device driver doesn't allow the necessary manipulation of the RTS line and therefore the support for PnP mice has been disabled for LynxOS.

PS/2 mouse drivers

LynxOS x86 comes with a PS/2 mouse driver. If it is not currently installed on your system, install it with /usr/bin/Install.ps2mouse.

The LynxOS PS/2 mouse driver is not always able to properly handle the mouse initialization performed by the X server. If your mouse is not responding after the X server has started up, modify the PS/2 mouse driver as follows:

  --- /sys/drivers/ps2mouse/mousedrvr.c.orig      Wed Aug 25 09:51:02 2004
  +++ /sys/drivers/ps2mouse/mousedrvr.c   Wed Aug 25 09:50:54 2004
  @@ -261,6 +261,7 @@
   int mousewrite(struct statics *s, struct file *f, char *buff, int count)
   {
          int i;
  +       return 0;
   #ifdef DEBUG
          kkprintf("Mouse: write %d %x\n", count, buff[0] & 0x0FF);
   #endif

Then rebuild both the mouse driver and the kernel:

     # cd /sys/drivers/ps2mouse
     # make
     # cd /sys/lynx.os
     # make install
     # reboot

ATC console driver and VT switching

Currently there is no support for virtual terminal switching once the server has started. Support for this feature may be added in future versions (it requires a patch to the vt100 LynxOS terminal driver).

You will need a free console which the X server will use for keyboard input. You must disable login on at least one of the four virtual terminals in /etc/ttys, e.g. /dev/atc3:

change
       /dev/atc3:1:default:vt100at:/bin/login

to
       /dev/atc3:0:default:vt100at:/bin/login
                 ^

X Server debug diagnostics output and other VT peculiarities

Output made by the X11R7.5 X on its stdout or stderr will be lost after the server switches to graphics mode. The X11R7.5 server stores its output in /usr/adm/Xorg.n.log (where n is the screen number).

When the X server is running output made to other consoles will be lost. After server shutdown the screen contents of other consoles may be inconsistent with what one would expect (i.e. random).

Disk space requirements

Currently there is no support for shared libraries in the LynxOS X11R7.5 port. A complete binary installation along with manual pages will require approximately 250 MBytes of disk space. To compile the system you will need at least 350 MBytes of free disk space.

Changes to system environment (LynxOS x86)

Before compiling the X11R7.5 distribution you will have to make a few little adjustments to your system:

• If not already installed, on your `LynxOS 3.1.0a' system create a shell script named /lib/cpp as follows:

  #!/bin/sh /usr/lib/gcc-lib/i386-coff-lynxos/2.9-gnupro-98r2/cpp \ -traditional "$@"

  On other platforms than the x86 the paths for the compiler support programs are different. You may use

  gcc -v

  to find out the correct path. Set the file mode of /lib/cpp with

  # chown root /lib/cpp # chmod 755 /lib/cpp

• Modify /lib/liblynx.a. On `LynxOS 3.1.0a' the X servers need the smem_create() system call to map the frame buffer into their address space. The system call is in liblynx library along with other Lynx proprietary calls which (unfortunately) overlap with calls in libc. To reduce confusion you should modify liblynx as follows:

  # mv /lib/liblynx.a /lib/liblynx.a.ORG # mkdir /tmp/xx; cd /tmp/xx # ar xv /lib/liblynx.a.ORG # ar rv /lib/liblynx.a *smem* # ranlib /lib/liblynx.a

make World

If you have the MTRR device driver installed, add a line

    #define HasMTRRSupport YES

to the config/cf/host.def file.

You may then issue a

     make World

to compile X11R7.5. After some time (and hopefully a successful build of the X11R7.5 system) you can install the software using

     make install

You must be logged in as super-user (root) when you invoke `make install'.

Installing X11R7.5 manual pages

LynxOS uses cat-able manual pages, and because a doc preparation system is definitely not a vital component of a real-time operating system you must first install groff-1.09 (or newer).

X11R7.5 manual pages may be installed using

     make install.man

The index and whatis database for the X11R7.5 manual pages will be created automatically. If you already have a whatis database or index file in the destination directories you should perform a sort/uniq operation to remove duplicate entries:

     for i in 1 3 5
     do
       rm -f /tmp/tmpfile
       sort /usr/X11R6/man/cat$i/LIST$i | uniq > /tmp/tmpfile
       mv /tmp/tmpfile /usr/X11R6/man/cat$i/LIST$i
     done
     sort /usr/X11R6/man/whatis | uniq > /tmp/tmpfile
     mv /tmp/tmpfile /usr/X11R6/man/whatis