UPD75P4308GS datasheet(23/60 Pages) NEC

23 / 60 page

µPD75P4308

Group

Mnemonic

Operand

No. of Machine

Operation

Addressing

Skip condition

bytes cycle

area

Accumulator

RORC

← A0, A3 ← CY, An - 1 ← An

manipulate

NOT

← A

Increment/

INCS

reg

1 + S

reg

← reg + 1

reg = 0

decrement

rp1

1 + S

rp1

← rp1 + 1

rp1 = 00H

@HL

2 + S

(HL)

← (HL) + 1

(HL) = 0

mem

2 + S

(mem)

← (mem) + 1

(mem) = 0

DECS

reg

1 + S

reg

← reg – 1

reg = FH

rp’

2 + S

rp’

← rp’ – 1

rp’ = FFH

Compare

SKE

reg, #n4

2 + S

Skip if reg =n4

reg = n4

@HL, #n4

2 + S

Skip if (HL) = n4

(HL) = n4

A, @HL

1 + S

Skip if A = (HL)

A = (HL)

XA, @HL

2 + S

Skip if XA = (HL)

XA = (HL)

A, reg

2 + S

Skip if A = reg

A = reg

XA, rp’

2 + S

Skip if XA = rp’

XA = rp’

Carry flag

SET1

← 1

manipulate

CLR1

← 0

SKT

1 + S

Skip if CY = 1

CY = 1

NOT1

← CY

UPD75P4308GS Datasheet(PDF) 23 Page - NEC

UPD75P4308GS Datasheet(HTML) 23 Page - NEC

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