Standards

191

GHIJK

I c

Section

Editor:

interface

Harald

I..

I

UV

WXYZ

J

Schumny

and &v-

Standardization

The national and international interface and bu< standardization work is carried out b> a nurzber 01 independent organizations cooperating to iomc exter.t but often not knowing enough about one another. The following is a list of important organizations active in this standardi&z:ion v.ork.

(1)

InlernationaE

IEC IS0

Knternarional Commission International Standardization

Eleclrol~ct~n~LYal

Organilarion

for Data

C’ommuni~dti0n.s

(2) Regional CCITT

ECMA ESONE

EDISG EWICS

comite

consulratlf

inrerna-

tional TGgraphique et Ti-It”phonique IlanuComputer European facturers Association Standardization European Organization for Nuclear Elcctronics European Distributed Intclligence Study Group European Workshop on Industrial Computer Systsms Inferconnectictn

of Equipment

(3) National AFNOR

Association malisation

Franqaise

de

ISO/TC97/SC13

(Subcommittee

DlNiNUAA13

nectlon of Equipment) (Working Group 13)

Nor-

13

“irlic:..
902

Standards

Table Data

1 Communcatlons ECM4

DlN

IS0 _____~

EIA

CCITT

1177

RS-232-C

v.10

6

66019

-

1745

RS-334

V.11

16

66020/

1

2710

US-366

V.20

17

66020/Z

1

2111

RS-404

v.21

23

66021/

2628

RS-422

V.23

24

66021/Z

2629

RS-423

V.24

26

6602113

4902

RS-449

v.25

27

66021/4

V.26

28

66021/5

V.27

29

6602116

V.28

35

6602:

v.29

37

66021/S

v.31

46

66021/9

4903

17

X.1

66021:lO

x.2

66022/

1

x.20

66258/

1

x.21

66259 /

X.24

66259

X.25

66259/3

1 /2

X.26 ___

Table

X.27

__-____

2

Protocols -I_

IHDLCI

-__.-_._

IS0

ECMA

DIN

-___

3309.2

40

66221/l

4335

49

66221/2

6256

60

66222

____

Table

__--

61

-

3

Peripf>erai Buses IS0

IEC

IEEE

Siiu

i>P 6546

462

583

66202/l

DP 7068

516

595

66202!2

EP 7069

552

596

IEC 516

640

675

IEC 45.111

683 45.

726

66.22

468

758 IEC 62511

625-1 625.2

Table

IEC 625/Z

4

System

Buses

IS0

IEEE

DP 6951

is-100)

____

(Multibud

P 696 P 796

Sraandards

Table

blies has been founded as the future 1EC/SC 4713. Together with the “Parze’t project” there are now 4 compleleiy dii’ferent system buses in rhe standardiration work. Af’ter this. three future situations are conceivable: All the variousgroups come together and agree upon one standard. This would be ths beer >oiuiion !or designers an2 end users. hut it i\ the mc~’i improbable one Thcrc will bc ;Arrtiml~cr o! different it.indard~. bu! one ~111predcxniimte because t/ i\ adopted by mo\t of‘ the producer5 and end users. Thi\ situation often arises and can i?c roterated. None of the standards ii acrrpti’d becauke the important producers use their ohbn biii standards. Apart from the S-150 bui, ihi> ih tiic ~,rtuation ac now have, whhich mean!, thcrc ii

5

interface

and BUS Projects

IEC/TC65 DINiDKEIK933 IIndustrial

3

Process

Measurement _

and Control1

IEC/TC66 DlN/DKE/K9333.1 lElecrronic

Measunng

Equipment) IEEE IEClSC

S-100 478

Bus :16 t.rr

Mullibus Backplane computer

ESONE

193

P 636

Ihe

P /Y6 Bus rl 896 \m11crosystem

bus)

E.Bw.

FUKOEUS;

.L1~XELBUS,

‘tl::f

TIBUS, OMEGA BUM,Q-Bus, STD-Bus. .c- rW-Hu~+, T-Bus, VERSABUS, Z-Bus ets.

Fast Bus l”lmproved

CAMAC’I

znd Small

System

lmicrocwnpufer

Bus.

SSB

sy~tern

bus1

Microcomputer system buses (backplane busey) arc relatively new topics for several committees and study groups. In the author’s view, there are mainly 4 independent activities: (1) IEEE with the S-155 Bus, the Multibus, and the new project P 896, the “Backplane Bus” (in future aIso to be covered by IEC/SC 47 B): (2) IS0 with a “Processor System Bus Interface”: (3) ESONE with a “Small System Bus”; (4) a Study Group of Nuclear Electronics (German speaking European countries) with a muliiprocessor bus project (initiated by Prof. Patzelt. University of V&ma). The IS0 project is already at a draft proposal stage (DP 6951). It is based on the Eerranti EUROBUS. This is also true of the ESONE Small System Bus, but it is not quite clear in which way the two proposals meet or where differences lie. The IEEE P896 Backplane Bus is under development with European participation (Prof. Nicoud from the ETH Lausartne is supporting the work). Recently an IEC working group on microprocessor assem-

Real Time Standard

FORTRAN

Draft

1 t’)JIIUKAN 77. !I is currently discussed to be sub:II~:~~~Jto I%) for m~crnarional standardization. (. trf~~\ ot’ I!I: Draft ma.: be obtained free of .‘I:~T;;\*Irom III<’I-hairman ol‘ EWICS TCI:

Ljf Willwit I;uci5 ~lci~rrn~hali*r f.inotypc

Enr~bricklunj:

Frankfurter Allee 55-75 D-6236 Eschborn bei Frankfurt Federal Republic Germany Comments to the Draft received before August 31, 1981, will receive a written reply after being considered by the committee. Comments should be submitted to the chairman of EWICS TCI.