TABLE III COP413C Instruction Set

(Continued)

Hex

Machine

Mnemonic

Operand

Code

Language Code

Data Flow

Skip Conditions

Description

(Binary)

MEMORY REFERENCE INSTRUCTIONS

(Continued)

XDS

r

b

7

00 r 0111

RAM(B)

A

Bd decrements past 0

Exchange RAM with A

Bd–1

and Decrement Bd

Exclusive-OR Br with r

XIS

r

b

4

00 r 0100

RAM(B)

A

Bd increments past 15

Exchange RAM with A

and Increment Bd

Exclusive-OR Br with r

REGISTER REFERENCE INSTRUCTIONS

CAB

50

0101 0000

A

None

Copy A to Bd

CBA

4E

0100 1110

Bd

None

Copy Bd to A

LBI

rd

–

00 r (d-1)

rd

Skip until not a LBI

Load B Immediate with

rd

LEI

y

33

0011 0011

y

None

Load EN Immediate

0010

y

TEST INSTRUCTIONS

SKC

20

0010 0000

Skip if C is True

SKE

21

0010 0001

Skip if A Equals RAM

SKGZ

33

0011 0011

Skip if G is Zero

21

0010 0001

(all 4 bits)

SKGBZ

33

0011 0011

1st byte

Skip if G Bit is Zero

001

0000 0001

111

0001 0001

2nd byte

203

0000 0011

313

0010 0011

*

SKMBZ

0

01

0000 0001

Skip if RAM Bit is Zero

111

0001 0001

203

0000 0011

313

0001 0011

INPUTOUTPUT INSTRUCTIONS

ING

33

0011 0011

G

None

Input G Ports to A

2A

0010 1010

INL

33

0011 0011

None

Input L Ports to RAM A

2E

0010 1110

OMG

33

0011 0011

RAM(B)

None

Output RAM to G Ports

3A

0011 1010

XAS

4F

0100 1111

A

SIO C

Exchange A with SIO

Note 1

The JP instruction allows a jump while in subroutine pages 2 or 3 to any ROM location within the two-page boundary of pages 2 or 3 The JP instruction

otherwise permits a jump to a ROM location within the current 64-word page JP may not jump to the last word of a page

Note 2

A JSRP transfers program control to subroutine page 2 (0010 is loaded into the upper 4 bits of P) A JSRP may not be used when in pages 2 or 3 JSRP

may not jump to the last word in page 2

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