Instructions for use of the parallel port true random number generator rp1 
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1. Plug the generator rp1 onto the parallel port. 

2. The device drivers (rp1m.c and  rp1p.c for Linux, randlpr.pas für DOS, Win98, WinNT ....) needs the correct base  
  address of the concerning parallel port (constant PPB0 in rp1m.c and rp1p.c).
     The base address can be found in the BIOS, /var/log/boot.msg or,  with PCI parallel port cards in /proc/pci.
 
3. The module rp1m.o (from rp1m.c) can be used with the script rp1m with the parameters 
     "start", "stop" or "restart". 
    The module starts with an auto-detection and if this was successful the device /dev/rp1m will be created. 
         If the auto-detection failed, the error message can be found in /var/log/messages.
         The device file can be used with dd and other commands; e. g. "dd if=/dev/rp1m of=tmp.out
         bs=5 count=10000".
    
4. The user-space-program (for Linux) has usually this usage: 
    rp1p  <output-file-name> <output-file-size [Bytes]>
     and can be used with an additional parameter (see source code).
    





	Dipl. Phys. Rolf Freitag, rolf.freitag at email.de