Description Of "Operation" Column; Description Of "Flag" Column - NEC PD78056F User Manual

27.1.2 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
RBS : Register bank select flag
IE : Interrupt request enable flag
NMIS : Non-maskable interrupt servicing flag
( ) : Memory contents indicated by address or register contents in parentheses
, : Higher 8 bits and lower 8 bits of 16-bit register
H L
: Logical product (AND)
: Logical sum (OR)
: Exclusive logical sum (exclusive OR)
—— : Inverted data
addr16 : 16-bit immediate data or label
jdisp8 : Signed 8-bit data (displacement value)

27.1.3 Description of "flag" column

(Blank) : Not affected
0 : Cleared to 0
1 : Set to 1
: Set/cleared according to the result
R : Previously saved value is restored
CHAPTER 27 INSTRUCTION SET
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