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CHAPTER 15 INSTRUCTION SET
User’s Manual U12978EJ3V0UD
201
15.1.2 Description of “operation” column
A: A register; 8-bit accumulator
X: X register
B: B register
C: C register
D: D register
E: E register
H: H register
L: L register
AX: AX register pair; 16-bit accumulator
BC: BC register pair
DE: DE register pair
HL: HL register pair
PC: Program counter
SP: Stack pointer
PSW: Program status word
CY: Carry flag
AC: Auxiliary carry flag
Z: Zero flag
IE: Interrupt request enable flag
NMIS: Flag indicating non-maskable interrupt servicing in progress
( ): Memory contents indicated by address or register contents in parenthesis
xH
, x
L
: Higher 8 bits and lower 8 bits of 16-bit register
∧: Logical product (AND)
∨: Logical sum (OR)
V: Exclusive logical sum (exclusive OR)
: Inverted data
addr16: 16-bit immediate data or label
jdisp8: Signed 8-bit data (displacement value)
15.1.3 Description of “flag operation” column
(Blank): Unchanged
0: Cleared to 0
1: Set to 1
x: Set/cleared according to the result
R: Previously saved value is restored