This is probably another one of my dumb newbie questions, but I have done
the necessary grunt work of reading the datasheet and the manual, and still
don't quite understand exactly how the assembler and the storage hierarchy
work together.  (I am using the 18F452 and have no experience with other
chips, so the questions are in regard to only that datasheet.  MPASM is the
assembler.

I understand that there are three separate storage areas:  program memory,
data memory, and a small bit of EEPROM memory.   It is my understanding
from the datasheet that all of the instructions which move data to or from
storage (that is, the instructions which involve "f") strictly operate to
or from data memory (RAM).

It also appears to me that to pre-allocate storage in assembler language,
that one uses the CBLOCK directive, which will allocate storage in data
memory, and/or use DA, DATA, DB or DW to pre-allocate storage in program
memory.

How does one read/write the data allocated in data memory?  The only way
that I see is to use the table read/write instructions.  Is  there another way?

How does one pre-allocate storage in EEPROM memory.  Is this what the DE
directive is for?  And same question as to how to read/write it.

Sorry for not knowing more.  Some day I will.  :-)

Thanks,
John

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