Hello, I am working on a PIC16C84 programmer for Linux. So far things
have been going prety well, but this eveing I have run into a small problem.

  When I read back the fuse and ID data I have programmed it is zero!
Programming and reading all of the data memory, and eeprom memory works
just fine. I have even built a distinctive ring switcher and used it for
several months with no problems.

  I just added ID and fuse verification to the program, so this problem
has probably always been there :>

  The method for programming ID is somewhat confusing in the PIC16C84
programming specs. It says to do a load config command, and then a
program cycle, etc. The way I do things is like this:

  Load Config command
  send 0x3FFF to pic

  load data (0x02) command
  ID data
  program command

  Read data command(0x04)
  If the data is wrong, I re-try up to 25 times.

  then loop for 3x the wrong count:
    load data command
    ID data
    program command

  Increment address finally!

  Do this for 0x2000-0x2003
  Skip over 0x2004-0x2006

  load data command
  send fuse data
  read data command
  if bad, print error message

  end of program routine.

  Can anyone see a problem with this sequence? This follows the diagram
on page 4 of the 16C84 programming spec.

  Thanks,
      Brian

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