While studying various PIC instructions' formats, I noticed a number of 
instructions that had a 'd' (destination) in the Mnemonic; e.g., MOVF 
f,d; ADDWF f,d; INCF f,d, et al.

If d=0, the results are stored in the W register - ADDWF  FSR, 0
If d=1, the results are stored in the f register - ADDWF  FSR, 1

My question is "Do you need to specify the "0" value if one knows they 
want the resultant value to be stored in the W register?"  Obviously, if 
one wants the result to be stored in the f register, they must specify 
the "1" value.  I'm probably all wet here, but was thinking perhaps the 
assembler would automatically default to the "0" value if nothing 
specified.  Before you shoot me, I am in agreement it would be better to 
specify either a "0" or "1" depending on what it is one wants done.  I'm 
just curious.

Bo Dirigo


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