NEC PD75402A Manuale Utente

The operands are described in the operand field of each instruction in accordance with the description for the

operand identifier of the instruction. (See "RA 75X Assembler Package User's Manual Language Volume (EEU-730)

for details.) For parameters with multiple elements in the description, one of the elements is selected. Upper case

letters and the symbols #, @, !, and $ are key words and described unchanged.

For immediate data, a suitable value or label is described.

Instead of mem, fmem, bit, etc., various kinds of registers and flag symbols shown in Table 3-4 can be written

as labels (however, in the case of fmem there are restrictions on the labels that can be written. See Table 3-3

"Applicable Addressing Modes at Peripheral Hardware Operation" and Table 3-4" 

µ

PD75402A I/O Map" for details.

Identifier

Description

reg

X, A, H, L

reg1

X, H, L

rp

XA, HL

n4

4-bit immediate data or label

n8

8-bit immediate data or label

mem

8-bit immediate data or label*

bit

2-bit immediate data or label

fmem

FB0H to FBFH, FF0H to FFFH immediate data or label

addr

11-bit immediate data or label

caddr

11-bit immediate data or label

faddr

11-bit immediate data or label

PORTn

PORT0 to PORT3, PORT5, PORT6

IE

×××

IEBT, IECSI, IE0, IE2

For 8-bit data processing, mem can describe even address only.

A

: A register; 4-bit accumulator

H

: H register

L

: L register

X

: X register

XA

: Register pair (XA); 8-bit accumulator

HL

: Register pair (HL)

PC

: Program counter

SP

: Stack pointer

CY

: Carry flag; bit accumulator

PSW

: Program status word

PORTn

: Port n (n = 0 to 3, 5, 6)

IME

: Interrupt master enable flag

IE

×××

: Interrupt enable flag

PCC

: Processor clock control register

.

: Address, bit delimiter

( 

×× 

)

: Contents addressed by 

××

××

H

: Hexadecimal data