2 description of "operation" column, 3 description of "flag operation" column – NEC uPD78056Y User Manual
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CHAPTER 27 INSTRUCTION SET
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
×
H
,
×
L
: Higher 8 bits and lower 8 bits of 16-bit register
∧
: 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 operation” column
(Blank) : Nt affected
0
: Cleared to 0
1
: Set to 1
×
: Set/cleared according to the result
R
: Previously saved value is restored