> Well, drat, just when I thought I had things figured out, up comes
> another strangeness.  The following code shows that I assign zero to a
> variable called DVAR, which I would certainly presume is located in data
> memory.  (If not, then I am misunderstanding how things work).  Then,
> just as a test, I assign zero to "MyStart" which is not defined in data
> memory, but is clearly in program memory.  This is happily accepted by
> MPASM (although the address is truncated to 8 bits).  Should not this
> have been flagged as an error???

Nope.  MYSTART is merely a symbol that has a certain value, in this case
3FEh.  The assembler does not maintain a data type for MYSTART, and does
not remember that it was defined as a program memory address.  Therefore,
the instruction

    movwf   mystart

is the same as

    movwf   h'3FE'

which writes the value in W to the RAM location 3FEh.


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