IBM nec pd78081(a) User Manual

217

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)

(Blank) : Nt affected

0

: Cleared to 0

1

: Set to 1

×

: Set/cleared according to the result

R

: Previously saved value is restored