. Assembler Operator

operand.position_operand

The dot operator ('.') designates a bit from the word operand whose position is specified by the position_operand. The position_operand must be an absolute expression that evaluates to a number from 0-15. The operand specifies a bit-addressable word in the internal RAM or SFR area.

The following table specifies the different memory areas for operand:

The operand may also be located in a bit-addressable data section as shown in the example below.

BD10   SECTION DATA BITADDRESSABLE
 BW0   DSW1
BD10   ENDS
EXTRN  BW1 : BIT WORD                ; external bit word

BCLR   BW0.3                         ; valid bitaddress
BCLR   BW1.15                        ; external bit word in bitaddress
BCLR   0FD00H.15