GMS81C5108 APPENDIX
JUNE 2001 Ver 1.0
iii
B. INSTRUCTION
B.1 Terminology List
Terminology
Description
A
Accumulator
X
X - register
Y
Y - register
PSW
Program Status Word
#imm
8-bit Immediate data
dp
Direct Page Offset Address
!abs
Absolute Address
[ ]
Indirect expression
{ }
Register Indirect expression
{ }+
Register Indirect expression, after that, Register auto-increment
.bit
Bit Position
A.bit
Bit Position of Accumulator
dp.bit
Bit Position of Direct Page Memory
M.bit
Bit Position of Memory Data (000
H
~0FFF
H
)
rel
Relative Addressing Data
upage
U-page (0FF00
H
~0FFFF
H
) Offset Address
n
Table CALL Number (0~15)
+
Addition
x
Upper Nibble Expression in Opcode
y
Upper Nibble Expression in Opcode
−
Subtraction
×
Multiplication
/
Division
( )
Contents Expression
∧
AND
∨
OR
⊕
Exclusive OR
~
NOT
←
Assignment / Transfer / Shift Left
→
Shift Right
↔
Exchange
=
Equal
≠
Not Equal
0
Bit Position
1
Bit Position
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