Myke:

I had a similar problem programming and reading the EEPROM data in
a 16C84 using PICstart Plus.  In response to my earlier post here,
Darrel Johansen verified that there is a problem when using Simulator
mode in MPLAB with the PICstart Plus.  Here is the response that
I recieved then.  I don't know what the status is regarding a fix to
the problem.

Brent

---<Included Mail>---

     >Subject: Picstart Plus Data EEPROM programming
     >Author:  Brent Miller <miller@HAL.COM> at Internet_Exchange Date:
     >6/23/96 3:50 PM

     >I have been trying, without much success, to program the data memory
     >in a 16C84 using the new Picstart Plus programmer under MPLAB.

     >EEPROM data programming is supported by the Picstart Plus, at least
     >according to the menus.  What I have seen is that the data that gets
     >written is always 'FF', regardless of the data in the source file.

     Brent,

     We've gone through testing again on the 16C84 and you've identified a
     true bug.  It appears that if you are in Simulator mode, the '84 data
     memory is not read/programmed in PICSTART Plus.  If you go to Editor
     Only mode, you can manually enter data in the EEPROM window and it
     will burn/read correctly. We have found a way to get this to work
     correctly.  If you follow this sequence, this seems to work:

     - Select Editor Only mode
     - Enable PICSTART Plus
     - Select 16C84 for the PICSTART Plus
     - Open your 16C84 Project and Rebuild.
     - Program the 16C84.

     I'll keep you and the PICLIST posted as soon as we have fully
     investigated, fixed, and re-tested.

     Thanks for the feedback.

     Darrel.