Parallel link cable for Texas Instruments handhelds
  		===================================================
  
  
  Author: Romain Lievin
  Homepage: http://lpg.ticalc.org/prj_tidev/index.html
  
  
  INTRODUCTION:
  
  This is a driver for the very common home-made parallel link cable, a cable 
  designed for connecting TI8x/9x graphing calculators (handhelds) to a computer
  or workstation (Alpha, Sparc). Given that driver is built on parport, the 
  parallel port abstraction layer, this driver is architecture-independent.
  
  It can also be used with another device plugged on the same port (such as a
  ZIP drive). I have a 100MB ZIP and both of them work fine!
  
  If you need more information, please visit the 'TI drivers' homepage at the URL
  above.
  
  WHAT YOU NEED:
  
  A TI calculator and a program capable of communicating with your calculator.
  
  TiLP will work for sure (since I am its developer!). yal92 may be able to use
  it by changing tidev for tipar (may require some hacking...).
  
  HOW TO USE IT:
  
  You must have first compiled parport support (CONFIG_PARPORT_DEV): either 
  compiled in your kernel, either as a module. 
  
  Next, (as root):
  
         modprobe parport
         modprobe tipar
  
  If it is not already there (it usually is), create the device:
  
         mknod /dev/tipar0 c 115 0
         mknod /dev/tipar1 c 115 1
         mknod /dev/tipar2 c 115 2
  
  You will have to set permissions on this device to allow you to read/write
  from it:
  
         chmod 666 /dev/tipar[0..2]
         
  Now you are ready to run a linking program such as TiLP. Be sure to configure 
  it properly (RTFM).
         
  MODULE PARAMETERS:
  
    You can set these with:  modprobe tipar NAME=VALUE
    There is currently no way to set these on a per-cable basis.
  
    NAME: timeout
    TYPE: integer
    DEFAULT: 15
    DESC: Timeout value in tenth of seconds. If no data is available once this 
  	time has expired then the driver will return with a timeout error.
  
    NAME: delay
    TYPE: integer
    DEFAULT: 10
    DESC: Inter-bit delay in micro-seconds. A lower value gives an higher data
  	rate but makes transmission less reliable.
  
  These parameters can be changed at run time by any program via ioctl(2) calls 
  as listed in ./include/linux/ticable.h.
  
  Rather than write 50 pages describing the ioctl() and so on, it is
  perhaps more useful you look at ticables library (dev_link.c) that demonstrates
  how to use them, and demonstrates the features of the driver. This is
  probably a lot more useful to people interested in writing applications
  that will be using this driver.
  
  QUIRKS/BUGS:
  
  None.
  
  HOW TO CONTACT US:
  
  You can email me at roms@lpg.ticalc.org. Please prefix the subject line
  with "TIPAR: " so that I am certain to notice your message.
  You can also mail JB at jb@jblache.org. He packaged these drivers for Debian.
  
  CREDITS:
  
  The code is based on tidev.c & parport.c.
  The driver has been developed independently of Texas Instruments.