Rainbow Electronics HT49R70A-1 - Manual (Page 38)

SUB A,[m] Subtract data memory from the accumulator
Description The specified data memory is subtracted from the contents of the accumulator, leaving the
result in the accumulator.
Operation ACC ¬ ACC+[m]+1
Affected flag(s)
TC2 TC1 TO PD OV Z AC C
¾ ¾ ¾ ¾ Ц Ц Ц Ц
SUBM A,[m] Subtract data memory from the accumulator
Description The specified data memory is subtracted from the contents of the accumulator, leaving the
result in the data memory.
Operation [m] ¬ ACC+[m]+1
Affected flag(s)
TC2 TC1 TO PD OV Z AC C
¾ ¾ ¾ ¾ Ц Ц Ц Ц
SUB A,x Subtract immediate data from the accumulator
Description The immediate data specified by the code is subtracted from the contents of the accumula-
tor, leaving the result in the accumulator.
Operation ACC ¬ ACC+x+1
Affected flag(s)
TC2 TC1 TO PD OV Z AC C
¾ ¾ ¾ ¾ Ц Ц Ц Ц
SWAP [m] Swap nibbles within the data memory
Description The low-order and high-order nibbles of the specified data memory (1 of the data memo-
ries) are interchanged.
Operation [m].3~[m].0 « [m].7~[m].4
Affected flag(s)
TC2 TC1 TO PD OV Z AC C
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
SWAPA [m] Swap data memory and place result in the accumulator
Description The low-order and high-order nibbles of the specified data memory are interchanged, writ-
ing the result to the accumulator. The contents of the data memory remain unchanged.
Operation ACC.3~ACC.0 ¬ [m].7~[m].4
ACC.7~ACC.4 ¬ [m].3~[m].0
Affected flag(s)
TC2 TC1 TO PD OV Z AC C
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
HT49R70A-1
Rev. 1.00 38 December 4, 2001