Installing RSX for EMX programs                               Arachne 1.50
http://www.mathematik.uni-bielefeld.de/~rainer/rsx/html/start.htm
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Installing RSX for EMX programs

Set the environment variable RSX to: 

  set RSX = C:\RSX\BIN\RSX.EXE

If the EMX program stub detects only DPMI (Windows and OS/2 DOS box), it 
must find rsx.exe in the PATH statement or the environment variable RSX.

If the emx stub finds a VCPI server (himem.sys + emm386, qemm386, max) it 
tries to run emx.exe. You should set the EMX environment to emx.exe. 

  set EMX = C:\EMX\BIN\EMX.EXE

This works with the emx stub (emxl.exe) from EMX version 0.8h or higher.

If there is no coprocessor, rsx emulates all coprocessor instructions by 
default. You can override this behavior with the '-Re' option.

That's it!

Notes:

(a)

If you always want to run rsx.exe instead of emx.exe, you should set EMX 
to RSX: 

  set RSX = C:\RSX\BIN\RSX.EXE
  set EMX = C:\RSX\BIN\RSX.EXE

If you have no coprocessor and you want run the gcc compiler this method 
is recommend. Also you can use the stub \rsx\bin\emxldpmi.exe. This stub 
runs always RSX and if there is a no DPMI-server, the stub loads CSX.EXE.

(b)

Note that the default stack is 60 KB. If you need more space, use the -s 
option to grow the stack, or set a environment-variable RSXOPT.

Example:

  set RSXOPT=-Rs512

sets the stack to 512 Kbytes.
