INSTRUCTION DESCRIPTIONS
MOTOROLA INSTRUCTION SET DETAILS A - 131
Restrictions: A JSET instruction used within a DO loop cannot specify the loop
address (LA) as its target.
A JSET located at LA, LA–1, or LA–2 of a DO loop cannot specify the program controller
registers SR, SP, SSH, SSL, LA, or LC as its target.
JSET SSH or JSET SSL cannot follow an instruction that changes the SP.
A JSET instruction cannot be repeated using the REP instruction.
Example: :
JSET #12,X:<<$FFF2,$4321 ;$4321➞(PC) if bit 12 (SCI COD) is set
:
Explanation of Example: In this example, program execution is transferred to the
address P:$4321 if bit 12 (SCI COD) of the 16-bit read/write I/O register X:$FFF2 is a
one. If the specified bit is not set, no jump is taken and the program counter (PC) is incre-
mented by 1.
Condition Codes:
For destination operand A or B:
S —Computed according to the definition. See Notes on page A-135.
L — Set if data limiting has occurred. See Notes on page A-135.
E — Not affected
U — Not affected
N — Not affected
Z — Not affected
V — Not affected
C — Not affected
For other source operands:
The condition codes are not affected.
JSET Jump if Bit Set
MR CCR
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
LF DM T ** S1 S0 I1 I0 S L E U N Z V C