CHAPTER 19 INSTRUCTION SET
19.1.2 Description of “Operation” column
A:
A register; 8-bit accumulator
X register
X:
B:
B register
C:
C register
D:
D register
E:
E register
H:
H register
L:
L register
AX:
BC:
DE:
HL:
PC:
SP:
PSW:
CY:
AC:
Z:
AX register pair; 16-bit accumulator
BC register pair
DE register pair
HL register pair
Program counter
Stack pointer
Program status word
Carry flag
Auxiliary carry flag
Zero flag
IE:
NMIS:
( ):
XH, XL:
:
Interrupt request enable flag
Flag indicating non-maskable interrupt servicing in progress
Memory contents indicated by address or register contents in parenthesis
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)
19.1.3 Description of “Flag” column
(Blank): Unchanged
0:
1:
x:
Cleared to 0
Set to 1
Set/cleared according to the result
Previously saved value is restored
R:
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User’s Manual U15075EJ1V0UM00
NEC [ NEC ]
