UPD754144GS datasheet(44/88 Pages) NEC

44 / 88 page

µPD754144, 754244

Instruction

Number

Addressing

Mnemonic

Operand

of machine

Operation

Skip condition

group

of bytes

cycles

area

Increment

INCS

reg

1+S

reg

← reg+1

reg=0

and

Decrement

rp1

1+S

rp1

← rp1+1

rp1=00H

instructions

@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

Comparison

SKE

reg, #n4

2+S

Skip if reg = n4

reg=n4

instruction

@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

manipulation

instruction

CLR1

← 0

SKT

1+S

Skip if CY = 1

CY=1

NOT1

← CY

Memory bit

SET1

mem.bit

(mem.bit)

← 1*3

manipulation

instructions

fmem.bit

(fmem.bit)

pmem.@L

(pmem7–2+L3–2.bit(L1–0))

← 1*5

@H+mem.bit

(H+mem3–0.bit)

CLR1

mem.bit

(mem.bit)

fmem.bit

(fmem.bit)

pmem.@L

(pmem7–2+L3–2.bit(L1–0))

← 0*5

@H+mem.bit

SKT

mem.bit

2+S

Skip if (mem.bit)=1

(mem.bit)=1

fmem.bit

2+S

Skip if (fmem.bit)=1

(fmem.bit)=1

pmem.@L

2+S

Skip if (pmem7–2+L3–2.bit(L1–0))=1

(pmem.@L)=1

@H+mem.bit

2+S

Skip if (H+mem3–0.bit)=1

(@H+mem.bit)=1

SKF

mem.bit

2+S

Skip if (mem.bit)=0

(mem.bit)=0

fmem.bit

2+S

Skip if (fmem.bit)=0

(fmem.bit)=0

pmem.@L

2+S

Skip if (pmem7–2+L3–2.bit(L1–0))=0

(pmem.@L)=0

@H+mem.bit

2+S

Skip if (H+mem3–0.bit)=0

(@H+mem.bit)=0

←

(H+mem3–0.bit)

UPD754144GS Datasheet(PDF) 44 Page - NEC

UPD754144GS Datasheet(HTML) 44 Page - NEC

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