Hi Folks,

I'm trying to write a 16C84 EEPROM and when I do, the PIC Locks up (doesn't
return from the Loop polling "WR" in "EECON1").

The Code is:

  movlw  0                      ;  Put the Data in EEPROM Address 0
  movwf  EEADR
  movlw  0x055                  ;  Simple Check Pattern
  movwf  EEDATA
  call   EEWRITE

  .
  :

EEWRITE                         ;  Put the Contents of EEDATA into EEPROM at
  bsf    STATUS, RP0            ;   EEADR
  bsf    EECON1 & 0x07F, WREN
  bcf    INTCON, GIE            ;  Turn Off Interrupts During Write
  movlw  0x055
  movwf  EECON2 & 0x07F
  movlw  0x0AA
  movwf  EECON2 & 0x07F
  bsf    EECON1 & 0x07F, WR
  bsf    INTCON, GIE
  btfsc  EECON1 & 0x07F, WR     ;  Wait for the EEPROM Write to Complete
   goto  $ - 1
  bcf    EECON1 & 0x077F, WREN  ;  Disable the EEPROM From Writing
  bcf    STATUS, RP0
  return

Data is displayed on three seven-segment LED displays.  Only the Timer is
used for Interrupts (to switch between the LED displays).  When I run this
on the MPLAB Simulator, it runs fine (although executes in one cycle, which
I find surprising).

The code above is identical to what's shown in the Datasheets, except for
the "bsf EECON1 & 0x07F, WREN" after the switch to Register Page 1.

Does anybody know what I'm doing wrong?

Thanx,

Myke

Do you ever feel like an XT Clone caught in the Pentium Pro Zone?