Central Processor Unit (CPU)
Opcode Map
MC68H(R)C908JL3E/JK3E/JK1E — Rev. 1.0
Technical Data
MOTOROLA
Central Processor Unit (CPU)
67
BCS rel
Branch if Carry Bit Set (Same as BLO)
PC
← (PC) + 2 + rel ? (C) = 1
––– ––– REL
25
rr
3
BEQ rel
Branch if Equal
PC
← (PC) + 2 + rel ? (Z) = 1
––– ––– REL
27
rr
3
BGE opr
Branch if Greater Than or Equal To
(Signed Operands)
PC
← (PC) + 2 + rel ? (N ⊕ V) = 0
––– ––– REL
90
rr
3
BGT opr
Branch if Greater Than (Signed
Operands)
PC
← (PC) + 2 +rel ? (Z) | (N ⊕ V)=0 ––– ––– REL
92
rr
3
BHCC rel
Branch if Half Carry Bit Clear
PC
← (PC) + 2 + rel ? (H) = 0
––– ––– REL
28
rr
3
BHCS rel
Branch if Half Carry Bit Set
PC
← (PC) + 2 + rel ? (H) = 1
––– ––– REL
29
rr
3
BHI rel
Branch if Higher
PC
← (PC) + 2 + rel ? (C) | (Z) = 0
––– ––– REL
22
rr
3
BHS rel
Branch if Higher or Same
(Same as BCC)
PC
← (PC) + 2 + rel ? (C) = 0
––– ––– REL
24
rr
3
BIH rel
Branch if IRQ Pin High
PC
← (PC) + 2 + rel ? IRQ = 1
––– ––– REL
2F
rr
3
BIL rel
Branch if IRQ Pin Low
PC
← (PC) + 2 + rel ? IRQ = 0
––– ––– REL
2E
rr
3
BIT #opr
BIT opr
BIT opr,X
BIT ,X
BIT opr,SP
Bit Test
(A) & (M)
0 –– –
IMM
DIR
EXT
IX2
IX1
IX
SP1
SP2
A5
B5
C5
D5
E5
F5
9EE5
9ED5
ii
dd
hh ll
ee ff
ff
ee ff
2
3
4
3
2
4
5
BLE opr
Branch if Less Than or Equal To
(Signed Operands)
PC
← (PC) + 2 + rel ? (Z) | (N ⊕ V)=1 ––– ––– REL
93
rr
3
BLO rel
Branch if Lower (Same as BCS)
PC
← (PC) + 2 + rel ? (C) = 1
––– ––– REL
25
rr
3
BLS rel
Branch if Lower or Same
PC
← (PC) + 2 + rel ? (C) | (Z) = 1
––– ––– REL
23
rr
3
BLT opr
Branch if Less Than (Signed Operands)
PC
← (PC) + 2 + rel ? (N ⊕ V) = 1
––– ––– REL
91
rr
3
BMC rel
Branch if Interrupt Mask Clear
PC
← (PC) + 2 + rel ? (I) = 0
––– ––– REL
2C
rr
3
BMI rel
Branch if Minus
PC
← (PC) + 2 + rel ? (N) = 1
––– ––– REL
2B
rr
3
BMS rel
Branch if Interrupt Mask Set
PC
← (PC) + 2 + rel ? (I) = 1
––– ––– REL
2D
rr
3
BNE rel
Branch if Not Equal
PC
← (PC) + 2 + rel ? (Z) = 0
––– ––– REL
26
rr
3
BPL rel
Branch if Plus
PC
← (PC) + 2 + rel ? (N) = 0
––– ––– REL
2A
rr
3
BRA rel
Branch Always
PC
← (PC) + 2 + rel
––– ––– REL
20
rr
3
Table 6-1. Instruction Set Summary
Source
Form
Operation
Description
Effect on
CCR
Addr
e
s
Mo
d
e
Opc
o
de
O
p
eran
d
Cycl
es
VH I N Z C