HPC167064 datasheet(29/34 Pages) NSC

29 / 34 page

HPC Instruction Set Description (Continued)

Mnemonic

Description

Action

BIT INSTRUCTIONS

SBIT

Set bit

xMembit

RBIT

Reset bit

xMembit

IFBIT

If bit

If Membit is true do next instr

MEMORY TRANSFER INSTRUCTIONS

Load

MemI

xMA

Load incrdecr X

Mem(X)

xA X g1 (or 2)xX

Store to Memory

xMem

Exchange

Mem

Exchange incrdecr X

Mem(X) X g1 (or 2)

PUSH

Push Memory to Stack

xW(SP) SPa2xSP

POP

Pop Stack to Memory

SPb2

xSP W(SP)xW

LDS

Load A incrdecr B

Mem(B)

xA B g1 (or 2)xB

Skip on condition

Skip next if B greaterless than K

Exchange incrdecr B

Mem(B)

A Bg1 (or 2)

Skip on condition

Skip next if B greaterless than K

LD B

Load B immediate

imm

LD K

Load K immediate

imm

LD X

Load X immediate

imm

LD BK

Load B and K immediate

imm

xB immxK

ACCUMULATOR AND C INSTRUCTIONS

CLR A

Clear A

INC A

Increment A

A a 1

DEC A

Decrement A

A b 1

COMP A

Complement A

1’s complement of A

SWAP A

Swap nibbles of A

A 1512

wA 118 wA 74

A 30

RRC A

Rotate A right thru C

xA15 x

xA0xC

RLC A

Rotate A left thru C

wA15 w

wA0wC

SHR A

Shift A right

xA15x

xA0xC

SHL A

Shift A left

wA15w

wA0w0

Set C

Reset C

IFC

IF C

Do next if C e 1

IFNC

IF not C

Do next if C e 0

TRANSFER OF CONTROL INSTRUCTIONS

JSRP

Jump subroutine from table

xW(SP)SPa2xSP

W(table )

xPC

JSR

Jump subroutine relative

xW(SP)SPa2xSPPCa xPC

( is a1025 to b1023)

JSRL

Jump subroutine long

xW(SP)SPa2xSPPCa xPC

Jump relative short

PCa

xPC( is a32 to b31)

JMP

Jump relative

PCa

xPC( is a257 to b255)

JMPL

Jump relative long

PCa

xPC

JID

Jump indirect at PC a APCaAa1

xPC

JIDW

then Mem(PC)aPC

xPC

NOP

No Operation

PC a 1

xPC

RET

Return

SPb2

xSPW(SP)xPC

RETSK

Return then skip next

SPb2

xSPW(SP)xPC

skip

RETI

Return from interrupt

SPb2

xSPW(SP)xPC interrupt re-enabled

Note

W is 16-bit word of memory

MA is Accumulator A or direct memory (8-bit or 16-bit)

Mem is 8-bit byte or 16-bit word of memory

MemI is 8-bit or 16-bit memory or 8-bit or 16-bit immediate data

imm is 8-bit or 16-bit immediate data

imm8 is 8-bit immediate data only

For details of memory usage by each instruction see The HPC User’s Manual

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