Programming instructions

ManualsBrandsDigital Equipment Corporation ManualsComputer equipment220240

MNEMONIC

CODE

OCTAL

CODE

BASIC IOT INSTRUCTIONS

OPERATION

iof

ion

700002

turn off interrupt

700042

turn on interrupt

iors

700314

read status of io equipment

clsf

clef

clan

700001

skip if clock flag is 1

700004

turn off clock, clear clock flag

700044

turn on clock, clear clock flag

rsf

rsa

rsb

rrb

700101

skip if reader flag is a

700104

select reader for alphanumeric, clear reader flag

700144

select reader for bry, clear reader flag

700112

read the reader buffer into AC, clear reader flag

Psf

700201

Pls

700206

Pcf

700202

ksf

700301

krb

700312

tsf

tls

tcf

70040

1 skip if teleprinter flag is a 1

700406

load teleprinter buffer and select, clear teleprinter flag

700402

clear the teleprinter flag

dsf

700501

dls

700506

dcf

700502

dsf

700501

dcf

700601

dxl

700506

dxs

700546

dyl

700606

dys

700646

dlb

700706

Interrupt

IO Equipment

Clock

Paper tape reader

Paper tape punch

skip if punch flag is a 1

load punch buffer and select punch, clear punch flag

clear punch flag

Kevboard input from teleprinter

skip if keyboard flag’is a 1

read the beyboard buffer into the AC,

clear keyboard flag

Teleprinter

Display type 30A

skip if display flag is a 1

load display buffer and select, clear display flag

clear display flag

Display type 30D

skip if display flag is a 1 (light pen)

clear display flag

load x co-ordinate

load x co-ordinate and select

load y co-ordinate

load y co-ordinate and select

load brightness register