At 05:18 PM 3/12/97 +0000, you wrote:
>Hi,
>
>I've been trying to use this MPLAB thing with a 12C508/JW (the UV erasable
>one) and can't get it to program the "MOVLW 0x30" into location 0x1ff.
>My program has an
>        org     0x1ff
>        movlw   0x30
>at the end, and even when I specify programming calibration memory it
>still comes out as XORLW 0xFF.


Yes, it took me about a week of investigating to get to the bottom of this
one.  Check the back list of the PICLIST for more details.  It turns out, as
verified by Microchip, that there is a flaw in MPLAB.  You must switch to
'editor only' mode or else that location won't program.  I am hopeful that
this bug will be fixed; the man at Microchip that I spoke with said he would
turn it over to the programmers.

Let me know if you need any more assistance; all works fine for me when you
remember to switch to 'Editor Only'.

  -Todd



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