PDP 8E_Engineering_Drawings_Rev AD_Dec72 8E Engineering Drawings Rev AD Dec72

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User Manual: PDP-8E_Engineering_Drawings_RevAD_Dec72

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PDP-alE computer
engineering ~rawings

The material herein is for information purposes only
and is subject to change without notice. Digital
Equipment Corporation assumes no responsibility for
any errors which may appear herein.
These drawings and specifications herein are the
property of Digital Equipment Corporation and shall
not be reproduced or copied or used in whole or in
part as the basis for the manufacture or sale of items
without written permission.
Copyright © 1975, Digital Equipment Corporation

digital equipment corporation · maynard. massachusetts

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ASSEMBLY
E-UA-POPB/E-.8-lI E -UA-POP8/E-o-o

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O:IA-5008903-0-0

D-IA-5009056- 0-0
CONTROL BOARD
ETCH

'PANEL CONTROL
(POP6/E)

D-fA-SOO90S6-0-0

SWITCH ASS'y'
(PDPS/E)
C-AD-700698ErO'0

SWITCH ASSY
(POP8/E)
C-AD-7006986 -0 -0

CONSOLE ASS'Y,
KCE- EB
D-UA-KC8- E-.0

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H9S,el-QB
D-UA-H95.0'-Q-.O'

POWER SUPPLY
H724 (tl5 V)
D-UA-H72.4-11-8
POWER SUPPLY
H724A (Z30V)
8-UA-H724 -4 -~

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SYSTEM EXPANDER
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A-PL-BAS-A -8

D-AD-7007074-0-0
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SYSTEM EXPANDER
BAS-BA
A..PL-BAS- A-d
D-D I-BA8-A -I
SYSTEM EXPAMOER
BA8-BB
A-PL-BA8-A -8
D-OI-BAS-A -I

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DIMENSION IN INCHES

TOLERANCES

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P,OP8E-ASSY (PL)
CHASS I ~ (POP8-E)
COVER (POP8-E)
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D

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PART NO.

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I

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DEPT USAGE

:~~

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DESCRIPTION

DEPT USAGE
PART NO,

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F/c

E-I A-7 408235-0-0
C-I A-7 4082 50-0-0
C-MD-7408249-0-0

,~~l~~~;l~j:~t~

9.

POWER SWI TCH & HARNESS ASSY

0-1 A-7006994-0-0

O.

SWITCH ASSEMBLY
SWITCH ASSEMBLY (PL)

C-AO-700~m=t~

1.

2,

13 "

14

A-PL-l006

CONSOLE ASSY KCB-EB
CONSOLE AS~Y KCB-EB (PL)
JUMPER

O-UA- ~CS-E-B
A-PL-KCB-E-B
B-1 A-7007146-0-0

COVER PANEL (l0-~}
COVER PANEL (10-~) (PL)
10-~ SNAP-ON BEZEL
INLAY

D-UA-H950- Q-B
A-PL'-H95a -Q·8
E-SC-1709225-0-0
C-CS-1209176-2-0

ONSOLE ASSY (KCB-EC)
CONSOLE ASSY (PL)

D-UA-KCB-E-ll'
A-PL-KCB-E-B

POWER SWI TCH & HARNESS ASSY

~~~~

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COVER PANEL (IO-~)
COVER PANEL (I O-~) (PL)
IO,·Yo SNAP-ON BEZEL
INLAY

D-UA-H96B-B-B
A-PL-H969-B-S
0-DI-H96B-B-l

17.

MEMORY MM8-E
MEMORY MM8-E (PL)
XY DR rVER
ETCH BOARD
SENSE INHIBIT G194
ETCH BOARD

O-UA-MMB-E-S
A-PL-MMB-HI
E-CS-G227 -B-1
5008832-0-0
E-CS-GI94-' .1.
5008B47-9-9

11 R.

EDGE CONNECTnR HB51
EDGE CONNECTOR HB51 (PL)
RECEP 36 PIN NETWORK

B-UA-HB51-B-B
A-PL-H851-B-B
B-~D-550907 1-0-0

119.

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PC ETCH PATTEN

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OMNIBUS eXPANDER (PL)
DRAW I NG INDEX LI ST

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TIMINe CII~GIiI\M
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CUSiCMER VARIATIONS
BASIC oE MFG TEST PROC
FIELD INSTAlL~ACCEf'T PROC
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5009104-0-0
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5009105-0-0
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5009278-0-0

DESCRIPTION
POPSE ASSY

D

E~cE§6; 9~0~lu'

TELETYPE CONT. (KL8-E)
ETCH BOARP KL8-E

2.
3.

6.

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IOMNIBUS BOARD ETCH
ASSY & DRILLING HOLE LAYOUT
PRINTED CIRCUIT LAYOUT
CONTROL BOARD ASSY

7.

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ASSY & DRilLING HOLE LAYOUT
PRINTED CIRCUIT LAYOUT

E-I A-5009056-0-0
AH-5009056-5
PC-5009056

17.

MEMORY MMS-E ASSY

A-ML-MU8-E

~1.

CENTRAL PROC~SSOR KKB-E

22.

TELETYPE CONT (KtB-E)

A-ML-KL8-E

23.

ONNI BUS EXPANDER

A-ML-BE8-A

24.

H724 POWER SUPPLY

A-Ml-H724-S

~5.

SYSTEM EXPANOEftBAB-AA

A-ML-BAS-0

c

A-PL-Be8-A-B
C-O 1-BE8-A-l

POWER SUPPLY H724
POWER SUPPLY H724 (PL)
DRAWING INDEX

SYSTEM EXPANDER BAS
SYSTEM EXPANDER BAS
DRAWING INDEX LIST

O~UA-H7 24-9-8
A-PL-H724-S-JI
0-01-Hn4-B-2

(PL)

SUPER COVER ~SSY
SUPER COVER ASSY
COVER SUPER
SCREEN BEZEL
eEZEL (5-114)
FILTER BEzn
RETAINER FILTER
LATCH MOLDING
RELIEF STRAIN

TABLE ASSY H95~-HA
TABLE ASSY H952-HA
DRAWING INDEX LIST

CONSOLE ASSY (KCS-EO)
CONSOLE ASSY (PL)
BE~EL

PC~5008903UJ-u'
29

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CENT PROCESSOR KKB-E
CENT PROCESSOR KK8-E (PL)
MAJOR REGISTERS 0 & I
ETCH BOARD
BUS LMDS LOADS 11832
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ETCH BOARD
MAJOR REG. CONT.
F.TCH BOARD

PART NO, 'PROD iC,

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COVER PLATE
PLANAR STACK BD
ETCH SO

DEPT

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H96.D-BA CAB
H96~-SA CAB (PL)
DRAW I NG INDEX LI ST

16.

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0-1 A-7007145-0-C

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15

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C-PL-POP8E-B-B

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C-MO-J 4~i 449-0-0
D~I A-74088S1-Q-0
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A-P 1-37 00028-0-0
PACKAGE INSTRUCTION POP/8E
E-AR-PDPS/E-_-2
BAS I C ASSY CONF.
A-SC-1210302-0-0
PAD, FOAM
A-MD-740SS11-1-0
BUMPER, FRONT PANEL
A-MO-7408612-2-0
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B-lIlO-7408629-0-0
SPACER, LATCH
C-MD-7408867-0-0
SH I PP I NG BRACKET
CABLE, I NTERCONNECT I NG
STRAIN RELIEF BRACKET
STRAIN RELIEF
REcc:MflEtI(E)lST LEVEL SPARES
Ii-p,
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TE LETY PE ASR-33 ACCESSORY LI ST A-AL-L lE~~:'i ~ n
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D-MD-760a"~~-u-U
A-PL-LT33-ST -B
LT33 TTY MAIN TOOL KI T
A-PL-LT33-SB-9
LT33-B TTY RECOM SPARE PARTS

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PANEL CONTROL (LA88-E)
PANEL CONTRQL (LABB-E)
PANEL CONTROL (LABS-E)
PANEL CONTROL (LAB8-E)

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A-PL-H952-H-'
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C-SS-7409007-0-1
C-SS-7409007-ll-2
C-SS-7409007-0-3
C-8S-7409007-0-4

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PP8E
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ENGINEERING speCIFICATION

DIGITAL BQUIPMBRT CORPORATION

.,,,

MAYNARD, MASSACHUSETTS

TITLE

ENGINEERING SPECIFICATION

The followin9 order in, of modules on the OMNIBUS will result in
best case timing and permit widest margins:

REVISIONS

II~

~G NQ

DESCRIPTION

A

REORDERED ASSIGNMENTS

B

REORDERED ASSIGNMENTS

RECOMMENDED OMNIBUS MODtn.E ASSIGNMENTS

DATE 11/24/70

TtTLE
REV

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CONTINUATION SHEET

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DATE

APPD BY

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•

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M849
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•
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•

•

GlOS
H220
G227

M8320

·

Memory Stinse/lnhibit (,arity)
Memory Stack (parity)
Memory X/y Drivers (parity)
Bus Loads (Always in last slot) -

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DIGITA~

EQUIPMENT CORPORATION

ENGINEERING SPECIFICATION

CONTiNUATION SHEET

MAYNARD, MASSACHUSETTS
TITLE

ENGINEERING SPECIFICATION
TITLE

1/20/72

DATE

Option & 'Steady
Module
State
Operating
Number
Current Current
+5V
+5V

OPTION POWER REQUIREMENTS
REVISIONS
DESCRIPTION

REV

IcHG NO

DATE

ORIG

APPD BY

OPTION POWER REQUIREMENTS

DATE

KKS-E
MS300
MS310
MS330
MS320

Steady Operating
State Current
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-l5V

+15V

...

.
1.5A
.57A
l.2A
.46A

1.65A
.6A
1.2A
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NA
NA

NA
NA

NA
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NA
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.525A

MMS-E

G104}
G227
H220_

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Other

2.2A

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3.3A

NA

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Only 4K of Mem in ar
Ext Mem system will
be at operating
current. The remainder will be at
steady state.

MC8-E
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KC8-E
5409668

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KL8-E
M8650

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M8341

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•

ENG

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Mel Arsenault

DEC FORM NO.
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DEC FORM NO 16-1022
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DEC FORM NO 16-1022
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DEC FORM NO 16-1022
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NUMBER
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DEC FORM NO 16-1022
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ASYNC. DATA CONTROL
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ENGINEERING SPECIFICATIONS

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TITLE

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DRA 132
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DIGITAL EQUIPMENT CORPORATION

ENGINEERING SPECIFICATION

MAYNARD. MAS~CHUSETTS

.ENGINEERING SPECIFICATION

TITLE

DATE 3/1. 5/71

CONTINUATION SHEET

KLS/E Asynchronous D&ta Control

.,'

TITLE

KLB/E Asynchronous Data Control (M86s0)

•

•
REV

DESCRIPTION

REVISIONS

~HONO

DATE

ORIG

APPD BY

I. General Description

DATE

The KLS/E provides complete facilities for interfacing
an asynchronous device such as a teleprinter.or display to the
POPS/E. Split lugs are provided such that a KLB/~may be
assigned any two device codes desired. In this manner a
quantity of KLB/E units may be used on a single POPS/E to
provide a multiple teleprinter capability. The instruction set
is similar to that used on previous Family-of-S. console
teleprinter controls and asynchronous data controls.
Several different clock speed and interface options are
offered.
II. Physical
Abstract

The KLB/E is a single quad board which plugs directly
into the Omnibusc The same etched board (MS6s0) is used for
all KLB/E options listed below, with a crystal change or
cable change determining the opt.ion designation applicable.

The KLB/E is a single line asynchronous data control
for the POPS-E. A variety of speeds at'e offered and split lugs
are provided such that any desired device codes may be . .wired in.
Factory wiring provides the standard console teleprinter device
codes 03 and 04. Both 20 milliampere and EIA/CCITT levels are
offered at 110 baud. In the higher speed ranges, onlYEIA/OCITT
interface is offered. The EIA/CCITT interface applies to data
leads only; no modem control is provided.". ):his: specification
includes a complete discussion of the current driver capabilities.,
the selection of device codes" the selection of speeds, and the
configurations available under each option designation.

III.

Op1tions
The KLB/E is available in the following options:
Designation

"

KLB/E
KLS/EA

KLB/EB

KLB/EC
KLB/ED
KLB/EE
KLB/EF
KLB/EG

Receive·
Speed
110
110
150
300
600
1200
150
1.50

Baud
Baud
Baud
Baud
Baud
Baud
Baud
Baud

Transmit
Speed
110
110
150
300
600
1200
1200
2400

Baud
Baud
Baud
Baud
Baud
Baud
Baud
Baud

Interface Type

(Board Type

20 milliampere
EIA Da ta Leads
EIA Data Leads
EIA Data Leads
EIA Data Leads
EIA Data Leads
EIA Data Leads
EIA Data Leads

M86s0
MS6s0
MS6s0
M86s0
MS6s0
MS6s0
M86s0
MS6s0

YA
YA
YA
YA
YA
YA

The M86s0 and M86s0 YA boards use an identical etched
board, but differ in their parts lists. The M86s0 uses,a OEC
Part # 1S-098S0-01 14.41S MHz crystal, while the M86s0 YA uses
a DEC Part # 1S-09SS0-02 19.661 MHz crystal. The 14.41S MHz
crystal is used to obtain the 110 baud frequency, while the ..
19.661 MHz crystal is used to obtain the 150, 30Q, 600, 1200,
and 2400 baud frequencies. This means that if cne desires to
change speeds in the field, a crystal change is involved to
change to or from the 110 baud sp~ed, plus Ie-labelling the
board handle. To change .!.mongst the speeds that are multiples

ENG

--

of 150 baud, only jumper changes are inVOlved.
~...

lAPp2!/,~./ --)/

I SIZE

John E. McNamara
~...... ~ ..........L
~n~Ec~F;O~RM~N~O~.~~=-~--·~~~
DRA 107

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A I

SP

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NUMBER

KLS-E-l

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DEC FORM NO , ... tDn
DRA 1",.

SHEET

.....L.

OF

M.fL

_,

.

-

-

ENGINEERING SPECIFICATION
TITLE

KLS/g Asynchronpus

DfI+=l

Control

,'.-f

'w"· .,,- ,.,.......,.....,....... ,_, .." ._'""....,...,_ _ _. . ._

. . . . . . . . .- -...
00
.......' ...
' - ; . - . - - - - - -.. -

TITLE

Both the M8650 and M8650 YA board contain tho
circuitry for both 20 milliamvere and KlA
operation. A noise ·suppre~ network in the 20 milliampere
cir.cuitry protects against high frequency noise, but in .0
doing limits the operating speed of the 20 mi.lliam~re
interface to 110 baud. The 20 milliampere circui.tfY is
automatically connected when the 7008360 interfac¥ cable
assembly supplied wi th the KL8/E option is conn.cted to the
board. This cable terminates in a Mate-N-Lock connectQr
compatible wi th PDP8/E teleprinters, PDl'-llteleprinters,
and Mate-N-Lock equipped PDP-l5 teleprinters. In like manner,
the EIA interface ci:cuitry is automatically connected when
the BC01V cable assembly (or BC05C) supplied with the. KL8/BA,
EB,EC,ED,BE,EF, and EG options is connected. (See Section X)

S~ecifications

~

I~ece~r

F.

CapClbiU.tie~;

de~rees C

i'

tim~s

the haud rate

of the 20 milliampere driver:

26
24
22
19
f'

AWG
AWG
AWG
AWG

:
:
:
:

40.81
25.67
16.14
8.05

ohms/1000
ohms/1000
ohms/1000
ob.s/1000

feet
feet
feet
teet

In calculating permissable .loop length, re. . .ber that
the above figures are for one conductor oaly. You must . . . sure
the distance from the IIL8/S"to the teleprinter AND BACK \0
obtain a footage distance for use in the above calcul.l.tion.
In addition, certain environmental influences such as radio
interferenc4lt, transformer., pnssibil,ity ot physical a.age,
may cau.e the maxim~ operatlng distance to be 1••• than
t.hat indicated by simple r~sistive calculations. ixtre••
caution should be used in any installation over 1S00 teet.

.'Q.

ar,d +65

Communications VaT-iables

A. Type or Transmi~sion:
Type of Reception:

Salllple Rate: 16

CONTINUATION SHEET

For current calculation purpos~s, the driver circuit
may be envi:iioned as one lead returned through 750 ohms to
-15 volts and· the other lead clS going to a poiiit connected
to -15 thl';lough 1. K and to +5 through a 65~-\4J) PiIo'P transistor,
the state of wldch is controlled by the 1us Data Control

"

The EIA interface circlli try meets all prese.nt
requirements of EIA Specification RS232-C and OCITT Recommendation
V24, but interfaces the DATA LEADS ONLY. No modem control
is supplied - Data Terminal Ready and Request To Send are held
asserted. Use of these options on modems arrange4 for aute.atic
origination or automatic answering of dial telephone calls is
not recommended. The EIA interfaces provided are intended toi
use with prjvate(non-switched) wire modems operated on a iull
duplex basis CT. with a Null Modem (N308 or ~312) and a terminal
with an EIA interrace.
Specifications -

~

ENGINEERING, SPECIFICATION

CONTINUATION SHEET

~ppropriate

IV~

..·,---·

G.

Asynchronous
Asynchronous

~pabilities

of

~hc

20 milliampere recuiver:

For current calcu.la tion purpuses, the rece,i\.. r
circuit may be vnvisioned as one lead returned through 560
oluns to -15 volts and the other lead returned to both
+ 5 ·through 750 ohms and to a -.7 'Vol t diode drop through
82 ohms. The resultant current will be 21 milli. .~re,. tor
a zero ohm resistance loop to the keyboard cont.cta an"
18 milliaMperes in the c .. se of a 150 ohm loop such .. a that
mentioned in Section V-F above. Inte~.diate valUe. caA
QC determined from straight line interpolation betw.en the.e
points '. It 15 not recommended tha t contact currents le.. than
18 l4illiamfJere~ be ~~5P".

B. Number of Start .Elements Per Character: One
C. NUmber of Data Elements Per Character: Eight
D. Number of Stop Elements, Per Character: One or Two (Jumper
selectable on board. Unless otherwise specitied, the
KLe/E and KLS/BA options will be supplied jumpered
for two stop elements and all other options will be
supplied jumpered for one stop element.)

The 20 m:i,lli.ampere CU1'rent receiving circuitry c:aetaJ.u ,

I SlJIlCODl1
NUII.IR
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SP I KLO-B-l
DEC FORM NO 'S-'DZ2
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NO ,... ,on

ENGINEERING SPECIFICATION
TITLE

CONTINUATION SHEET

ENGINEERING SPECIFICATION

. KLS/E Asynchronous Data Control

TITLE

an integrator circuit that may be modelled as a capacitor
in series with 402 ohms. The standard value for this
capacitor is .47 mfd. This arrangement assists in providing
noise reduction hy integrating high'frequency noise such
that its amplitude is insufficient to operate the Schmidt
Trigger circuit that follows the integrator. Unfortunately,
the integration zeduces the ra te-of-rise "of signals,
introducing an additional
distortion to the 'received
signal at 110 baud. The high sampling rate of the receiver
(16 times the baud rate) makes this additional distortion
inconsequential except in the case of very extreme distortion
already being present in the received signals. At speeds
greater than 110 baud, EIA interface circuitry is used,
bypassing both the 20 milliampere integrator circuit and
the 20 milliampere Schmidt Trigger ~ircuit.

KLB/E Asynchronous Data Control

b~ ~ropped by the passage of 12 milliamperes through the
w~r~ng

to the reader run. That sets a resistance limit of
179 ohms for the reader run control wiring from the KLB/E
to the Teletype. (and back). (See Section X)

2.

I. EIA Signals Provided
Circuitry on the M8650 and M8650 YA modules conditions the
transmitted data and received data to the specifications
of ' Electronic Industries Association (EIA) Specification
RS 232 C and Committe Consultatif International Telephonique
et Telegraphique (CCITT) Recommendation V24.
The signals and their assigned pins on the 40 pin header
found on the M8650 are as follows:

Should it be desired to operate in current loop
mode at speeds greater than 110 baud, the .47 mfd capacitor
should be reduced in size by the same proportion as the
speed is increased; i.e. if you double the speed, halve the
value of the capacitor. This product is not specified to
operate in current loop mode at speeds grea~er than 110
baud and the suggestions given above should not be construed
as a cammitmer.i on the part of Digital Equipment Corporation
to make this product operate in current loop mode at any speed
other than 110 baud.

Protective Ground
Send Data
Receive Data
Request To Send
Signal Ground
Data Terminal Ready

('

*. "Teletype" is a registered trademark of Teletype Corporation, Skokie, Ill. USA

DEC FORM NO 16-1022

nf:

DO

(Held Asserted)

I

SlfE ICODE
'"
SP

REV;

:itZ.,

(Held Asserted)

Note further that, since Data ~erminal Ready is held true,
the M8650 and M8650 YA are. suitable for dial telephone
connection use (such as with the Bell System 103A) ONLY
UNDER MANUAL CONTROL. In other words, these modules should
not be used in dial telephone connections arranged for
the. automatic origination of calls or arranged for the
automatic answering of calls. The reason for this is,that
Data Terminal Ready must be negated :for a dial-up co~nection
to be dropped when the call is over and the M8650 and M8650 YA
are ~nca,able of doing this. In addition, they do not monitor
the leads necessary to tell 'them when to take such action.

=

I

V

vv

Note that.!> since the Request To Send lead is held true, the
M8650 and M8650 YA are suitable ONLY FOR FULL DUPLEX
OPERATION (An additional reason is that there is no
interlocking logic in the M8650 and M8650 YA to make the
transmitter and receiver dep~ndent upon each other in the
fashion that Half Duplex would require).

The reader run leads operate a Wheelock #30002
reed relay mounted on a DEC 4915 teleprinte.r reader control
card mounted within the call control area of the Teletype.*
This relay has a'coil resistance of 920 ohms. and ;is specified
to opera te by the time the vol tage p.cross its coL.. reaches
9.6 volts. There is a + 10% tolerance on coil resistance,
so a worst case current of 12 milliamperes is required to
acbieve 9.6 volts across 828 ohms.Tlfe 12 milliamperes would
cause a 2.3 volt drop across the 180 ohm resistor if that
resistor were at the 189 ohm extreme of its + 5% specification.
This means that no more than 14.0 - 11.9
271 vol:ts can

SIZE ICODEI
NUMBER
SP' I KL8-E-1

J

Assertion of the Data Terminal Ready lead is required with
such modems as the Bell System 103A to maintain an
established dial-up connection.

For current calculation purposes, this circuitry may
be modelled as one lead being connected to -15 through !80 ohms
and the other lead eonnected to +5 through a 65340 PNP transistor and a 150 ohm resistor. Due to the presence of diode
clamps, transistor voltage drop, etc., this second lead
may be envisioned as being connected to a + 7/10ths volt
~e or floating, depending upon the state of the 65340
transistor. The circuit formed by the above elements may
be considered as a 14 volt source in series with 180 ohms.

! '14

UU
F

Assertion of the Request To Send lead is required with such
modems as the Bell System l03F to maintain them in Full
Duplex transmission mode on a private (non-switched) line.

H. Capabilities of the Reader Run Control:

,

-

CONTINUATION SHEET

DEC FORM NO '6-1022
ftDA11'1R

I

NUMBER
KL8-E-l
SHEET

--L

OF

ENGINEERING SPECIFICATION
TITLE

KL8/E Asynchronous Data Control

-

CONTINUATION SHEET

ENGINEERING SPECIFICATION
TITLE

In summary, the KLS/E, EA, EB,,··EC, ED, EE, EF, and
EG do not have modem control. Thus, their use with modems is
ltmited tn full duplex private line and manual use on the
dial-up telephone network.

VI.

Total cable length from the KLS/BA(BB. Be,ete) to
the associated modem or terminal must not exceed 50 feet
under any circumstances.
EI~

-

Programming
The KLe/E uses an augmented version of the instruction
set used on Family-of-8 console teleprinters and teleprinter
controls such as the PTOS.

.7. Capabili ties of the EIA interface

K. Use With

KLB/E Asynchronous Data Control

CONTINUATION SHEET

The instruction set is as
6XXO

Interface Terminals

foll~ws:

Clear Keyboard Flag (KCF)
Clears the keyboard flag without setting the reader run
flip-flop. The AC is not cleared by this instruction.

Th~ BCOlV and BC05C cable ass~mblies end in male
25 pin connectors in accordance with the EIA specification
requirements for data terminal eqUipment. Likewise, most
terminals that have EIA interfaces also employ male 25 pin
connectors, as they too are data terminal equipment in the
language of the EIA specification.

6XXl

Skip on Keyboard Flag (KSF)
Increments the contents of the Program Counter if the
keyboard flag js set,so that the next sequential
instruction is skipped.

The EIA specification, in specif¥ing male connectors
for data terminal equipment, envisions that each piece of
data terminal equipmen~ will be connected to a piece of
data communications equipment. The typical connection which
the specification envisions is data terminal equipment - modemcommunications facility - modem - data terminal equil_ent.
Thus, to stay wi thin the specification when conr.ecting a
piece of data terminal equipment to anothe~ piece of da~a .
terminal equipment, one must introduce the modem-commun1cat10ns
facility-modem link. In cases where the two te~minals ~re
more than 50 feet apart this would be done with real modems
and a real communications facility. Where dititancea less than
fifty feet are involved, Digital Equipment Co~~oration has
devices called Null Modems which contain a female 25 pin
connector,a length of cable that transposes the transmitted
an received data leads such as a communi~ations facllity
would and a second female connector at the opposite en~.
Use of the Null Modem (H3l2 or H30S) permits the same cables
and other hardware to be used for both local and remote
terminal applications.

6XX2

Clear Keyboard Flag

(KCC)

Clears the keyboard flag and AC and sets the reader run
flip-flop. This action allows the hardware to begin
assembling the next input character in the TTl register.
If the reader is activated and there is tape in the
reader, a serial character is read from the tape and
is assembled in the TTl register. The keyboard can
also load characters into the TTl register provided
,that the reader is deactivated. In either case, the
keyboard flag is eet when the character is assembled
in the TTl register.
6XX4

Read Keyboard Buffer Static (KRS)
ORs the contents of the.TTI register with AC4 through ~l,
and leaves the r~sult in AC4-ll. This is term.d a stat1e
command because neither the AC nor the keyboard flag is
cleared.

6XX5
Should a null modem not be available in a VT06
installation, the male/male cord supplied with the VT06
could be removed and the BCOlV plugged directly into the
female receptaole on th~ VT06 provided tha'.. the following
lead swaps are made in the BCOlV by swapping pins in the
forty pin connector: Swap F & J; Mov~ V to BB.

Set/Clear Interrupt Enable (KIB)
Sets or clears the interrupt enable fli}>-fllDp as
determined by ACll. If ACll is ass.rted, an interrupt
request will be generated when th~ KLS/J:i. key~oard or
teleprinter flag ls set. If ACl1 1S neg~ted lnterrupt
requests cannot be generated.

The above pin changes are not ':recommended as a
general thing, as they result in non-standard cables.

1-I..

SIZE leoDE I

DEC FORM NO '6-'022
ORA 10A

SP

I

NUMBER

KLS-E-J.
SHEET

--Z-

OF

.J1

DEC FORM NO '6-'022
DRA 108

SHEET

--L

OF

...1lL

ENGINEERING SPECIFICATION
TITLE

KLa/E Asynchronous Data Control

6XX()

-

EN.GINEERING SPECIFICATION

CONTINUATION SHEET

TITLE

KLS/E Asynchronous Data Control

Read Keyboard Buffer Dynamic (KRB)

flop is set.

Performs the combined operations of th~ KCC and KRS
instructions. Clears the AC and keyboard flag a·nd transfers
the contents of the TTl register to AC4 through AC11.
This instruction also sets the reader run flip-flop
to begin assembly of another character in the TTl
register. When this operation is complete, the keyboard
flag is set to indicate that another character is
available.

6Y.Y6

Set Teleprinter Flag (TFL)

Since a Clear All Flags instruction or operation.
of the CLEAR button on the console will cause the teleprinter
output flag to be cleared, it is necessary that each program
set the flag by means of a TFL instruction before
commencing a teleprinter output sequence for the first time.
In all of the above instructions the de·vice code
has been represented as XX for keyboard instructions and YY
for teleprinter instructions. In the case of the console
teleprinter, these would be device codes 03 and 04 respectively.
For further information on device codes, consult Secion VII of
this specification.

Sets the teleprinter flag to ready the logic for another
character.
6YY1

Load Teleprinter Sequence (TLS)
This instruction combines TCF and TEe. The teleprinter
flag is cleared and the contents of AC bits 4~11 are
transferred to the TTO register where the hardware sh~fts
the character out to the printer/punch unit. Then the
shifting operation has finished outputting the character
and is ready for another character, the teleprinter flag
is set. The whole operation, from the time at which the
TLS has cleared the flag and the TTO starts character
transfer, until the time the hardware finishes with the
character and again sets the flag, requires 100 millise~onds
at 110 baud.

,

The computer clears all flags which are on the clear
flags bus (including both the keyboarc: flag and the reader run
enable) when the console CLEAR pushb.tton is depressed or when
a Clear All Flags instruction is given. This means that till'.:::
user program must set the reader enable by means of a KeC or
KRB instruction before the first input data li:anrbe, receivedl,ably OR together the con'tents
of both receiv~r input registers, even if one contained only
a partially assembled character - so long as one of them had
the receivE,'r flag set. In. summary, a multiple teleprinter
sy~tem (or any multi-input/output device system) must have
unique device codes for each device so that the program can
address each device individually.

.

2

10
11

32/33

12
13
14
15
16
17

34/35
36/37

For PT08 compatibility 40/41,42/43,44/45,46/47 may be
used, as long as no DP8-E Synchronous Modem Control is used.
To obtain addi tional device codes, determine which
device codes you do not have yet on your system. Then writ~
down the desired device code as two binary numbers, labelh.ng
the most significant t:ii,:t'''MD3'', the next "MD4", the next"MD5",
the next "MD6", the next "MD7", and the last "MD8". For example,
for device code 03:
0
0

MD4
A

20
21
22

23
24

25
26
27

3

(f'

MD5
F

0

1

1

MD6 MD7 MD8
::::
0
C

SIZE ICODE I

SP

I

J

NUMBER

SHEET

- tf

Of

l!L

1-3

1-2

1-2

1-2

4-2

1-3
1-3
1-3
1-3

1-2
1-2
1-2
1-2
1-2
.1-2

4-3
4-3
4-3
4-3
4-3
4-3
4-3
4-3

1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2

1-3

1-2

4-2
1-2
4-~

1-2

4-2
1-2

4-2
1-2

4-2
1-2

4-2
1-2

4-2

Boa~d

I

4

I

poss iblc RECEIVER de'''lce
Group o Group E Gr.oup F
1 ..2'
1-2

4-2
4-2
1-2
1-::!

4-2

4··2
1-2
1-2

4-2
4-2
1-2
1-2

4-2
4-2

2-4
2-4
2-4
2-4

2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1

3-4
3-4
3-4
3-4

3-1
3-1

2-4
2-4
2-4
2-4

3-1

3-1
3-1
3-1

3-4
3-4
3-4
3-4

4-2
4-2

2-4
2-4
2-4
2-4

1-2
1-2

3-4
3-4

4-2
4-2

3-4
3-4

1-2
1-2

S~E ICsOpDE I

IIIEV

KLB-Il-1

1-3
1-3

of

'I

3-1
3-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1

IMPORTANT NOTIC~: Device codes U3 for receiver and 04 for
transmitter are factory wired by means of machine inserted
jumpers located in the split lug groups A,B,C,D,E,&F.
CUT THES~ JUMPERS BeFORE ADDING THE JUMPERS 1..ISTf:£D ABOVE.

The "Split Lug Groups" are explained on the nex:t paQe.

IA

~~.

The correct strapping for each
code is given below:
Group A Group B Group C
q>q>
1-3
1-2
1-2
01
1-3
1-2
4-2
02
] -2
1-3
1-2
03
1-2
1-3
4-2
04
1-3
1-2.
1-2
05
1-2
1-3
4-2
06
1-2
1-3
1-2
07
1-2
1-3
4-2

03/04 Console teleprinter teceive/transrnit
30/31 Second KLB/E teleprin~er receive/transmit

Octal:
0
Binary:
Label:
MD3
Split Lug Group:B

3
A

Since there are a limited number of possible device cod~s
in a PDP8/E, no assignment of device codes for large multit~leprinter systems can be made. It is suggested, however,
that the following device codes be used first:

DEC FORM NO 16-1022
ORA 108

-

ENGINEERING SPECIFICATION

DEC FORM NO "-1022
nDa 1nA

"M

I

NUMBER

Kl.8-~-1

SHEET

..JJ..

ENGINEERING SPECIFICATION
TITLE

CONTINUATION SHEET

KLS/E Asynchronous Data Control

ENGINEERING SPECIFICATION
TITLE

1-3
1-3
1-3
J.-3
1-3
1-3
1-3

50
51

1-3
1-3

52

1-3

53
54
55
56
57

4-2
4-2
4-2
4-2
4-2
4-2
4-2
4-2

1-2
4-2
1-2
4-2
1-2
4-2
1-2
4-2

1-2
1-2
4-2
4-2
1-2

1-3
1-3
1-3
1-3
1-3

4-2
4-2
4-2
4-2
4-2
4-2
4-2
4-2

1-2
4-2
1,-2
4-2
1-2

(,0
61
62
63
64
65
66
67

4-3
4-3
4-3
4-3
4-3
4-3
.4-3
4-3

70

4-3
4-3
4-3
4-3
·4-3
4-3
4-3
4-3

71
72

73
74
75
76
77

1-3

2-4
2-4
2-4

4-2
4-2

3-4
3-4
3-4
3-4

2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1

1-2
4-2

1-2
1-2
4-2
4-2
1-2
1-2
4-2
4-2

2-4
2-4
2-4.
2-4
3-4
3-4
3-4
3-4

3-1
3-1
3-1
3-1
3-1
3-1
3-1
3-1

4-2
4-2
4-2
4-2
4-2
4-2
4-2
4-2

1-2
4-2
1-2
4-2
1-2
4-2
1-2
4-2

1-2
1-2
4-2
4-2
1-2
1-2
4-2
4-2

2-4
2-4
2-4
2-4
3-4
3-4
3-4
3-4

2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1

4-2
4-2
4-2
4-2
4-2
4-2
4-2
4 ... 2

1-2
4-2
1-2
4-2
1-2
4-2
1 ... 2
4-2

1-2
1-2
4-2
4-2
1-2
1-2
4-2
4-2

2-4
2-4
2-4
2 .. 4
3 .. 4

3-1
3-1
3-1
3-1
3-1
3-1
3-1
:3-1

2-4

1-2

4~·2

3-4
3",4
3 ... 4

00
01
02
03
04
05
06
07
10

DEC FORM NO 16-1022
nRA inA

SHEET

.JL

OF

GrouE C
1-3
4-3
1-3
4-3
1-3
4-3
1-3
4-3

~R...Q

1-3
1-3
4-3
4-3
1-3
1-3
4-3
4-3

1-3
4-3
1-3
4-3
1-3
4-3
1-3
4-3

1-3
1-3
4-3
4-3
1-3
1-3
4-3
4-3

20
21
22
23
24
25
26
27

1-3
1-3
1-3
1-3
1-3
1-3
1-3
1-3

1-3
4-3
1-3
4-3
1-3
4-3
1-3
4-3

30
31
32
33
34
35
36
37

4-2
4-2
4-2
4-2
4-2
4-2
4-2
4-2

1-~

1;..3:
1-3
1-3
1-3
1-3
1-3
1-3

40
41
42
43

1-2
1-2
1-2
1 .. 2
1 .. 2
1·2
1 .. 2
1-2

4-3
4-3
4-3
4-3
4-3
4-3
4-3
4-3

12
13
14
15
16
17

44

45
46
47

-.i'1

GrouE B
1-3
1-3
1-3
1-3
1-3
1-3
1-3
1-3
1-3
1-3
1-3
1-3
1-3
1-3
1-3
1-3

.

GrouE E
2-1
2-1
2-1
2-1
3-1
3-1
3-1
3-1

GrouE F
2-4
2-4
2-4
2-4
2-4
2-4
2-4
2-4

2-1
2-1
2-1

3-4

2-1

3-4

3-1
3-1
3-1
3-1

3-4
3-4
3-4
3-4

1-3
1-3
4-3
4-3
1-3
1-3
4-3
4-3

2-1
2-1
2-1
2-1
3-1
3-1
3-1
3-1

2-4
2-4
2-4
2-4
2-4
2-4
2-4
2-4

1-3
4-3
1-3
4-3
1-3
4-3
1-3
4-3

1-3
1-3
4-3
4-3
1-3
1-3
4-3
4-3

2-1
2-1
2-1
2-1
3-1
3-1
3-1
3-1

3-4
3-4
3-4
3-4
3-4
3-4
3-4
3-4

1-3
4-3
1-3
4-3
1-3
4-3
1-3

1-3
1-3
4-3
4-3
1-3
1-3
4-3
4-3

2-1
2-1
2-1
2-1
3-1
3-1
3-1
3-1

2-4
2-4
2-4
2-1
2-4
2-4
2-4
2-4

4-3

3-4
3-4

I t

I

•

GrouE A
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1
4-2
4-2
4-2
4-2
4-2
4-2
4-2
4-2

11

IMPORTANT NOTICE: Device codes 03 afHl 04 for re7e·iv~f and tr~nsmi tter
.
t · ely are factory wired by Means of mach~.'jI~ ~nserted Jumpers
respec ~v
.
.
... HESE JUMPERS BEFORE
located in the split lug groups A,B,C,D,E,&F. CI r T
ADDING THE JUMPERS ..l..ISTED ABOVE.
NUMBER
I SIZE1CO' • KI..8-E-l
REV
l
SP

A

-

The correct strapping for each possible TRANSMITTER
device code is given below:

Continuation of receiver device code strapping table:
GrouE A GrouE B GrouE C GrouE D .Grou~ GrouE F
30
4-3
1-2
1-2
1-2
2-4
3-1
31
4-3
1-2
4-2
1-2
2-4
3-1
32
4-3
1-2
1-2
4-2
2-4
3-1
4-3
1-2
4-2
4-2
33
2-4
3-1
4-3
34
1-2
1-2
1-2
3-4
3-1
4-3
1-2
35
1-2
4-2
3-4
3-1
4,,·2
4-3
36
1-2
1-2
3-4
3-1
37
4-3
1-2
4-2
4-2
3-4
3-1
40
41
42
43
44
45
46
47

KLS/E Asynchronous Data Control

CONTINUATION SHEET

r REV

SIZE CODE"I
NUM8ER
~
SP
KL8-E-J.

DEC FORM NO 16-1022

...... in.

SHEET

~

OF

-1!l.

ENGINEERING SPECIFICATION
TITLE

1'..L8/E

A~ynchrolil)us

ENGINEERING SPECIFICATION

CONTINUATION SH£F.T

~------------------------------------------------------------------------------~
KLB/E Asynchronous Data Control

Data Control

t-----------------------~--------------------------

__------------------------______~
')

50
51
52
!i3
54

55
56

57

1-2
1-2
1-2
1-2
1-2
1,;,2
1-2
1-2

4-3
4-3
4-3
4-3

~roup'C

Group 0

Group E
2 ... 1
2-1
2-1
2-1

1-3

4-3

4-2
4-2
4-2
4-2
4-2
4-2
4··2
4-2

4-3
4-3
4-3
4-3'
4-3
4-3
4-3
4-3

1-3
4-3
1-3
4-3
1-3
4-3
1-3
4-3

1-3
1-3
4-3
4-3
1-3
1-3
4-3
4-3

2-1
2-1
2-1

4-2
4-2
4-2
4-2
4-2
4-2
4-2
4-2

4-3
4-3
4-3
4-3
4-3
4-3
4-3
4-3

1-3
4-3
1-3
4-3
1-3
4-3
1-3
4-3

1-3
1-3
4-3
4-3
1-3

2-1
2-1
2-1
2-1

3-4

3-1
3-1
3-1
3-1

3-4
3-4
3-4
3-4

~-3

4-3
4-3

1.-3

3-1
3-1
3-1
3-1

KLB/E
KLB/EA
KL8/EB
KLB/EC
KLB/ED
KLB/EE

q,roup F

1-3
4-3
1-3
4-3
1-3
4-3
1-3
4-3

4-3
4-3
1-3
1-3
4-3
4-3

TITLE

Option ry

"..

CPntinuation of transmitter device code strapping table:
Group A Group B

CONTINUATION SHEET

3-4
3.;.4

3-4
3-4
3-4
3-4
3-4
3-4

KLB/EF

KLB/EG

Greup

G

7-8

7-8
7-8
5-6
3-4
1-2

7-8
7-8

Notes

group H
1-2
1-2
1-2
1-2
1-2
1-2

2-3
H2 to G5

MB650
M8650
M8650
M8650
M8650
M8650
M8650
M8650

board
board
YA beard
YA board
YA board
YA boa rd
YA board
YA board

IMPOUTANT I'i)TICE: There are no factory rilachille; inse;rted jumpers
()O
()1

62
63

64
65
66
67

70
71
72
73
74

75
76
77

1-3

4-3
4-3

2-1
3-:\

3-1
3-1
3-1

in Group G. There must be one and only one of the straps shown
in the above tabl~ in place in section G for the board to work;

2-4
2-4
2-4
2-4
2-4
2-4
2-4
2-4

~aid

jumper was hand soldered between the split lugs at the
time the board left Digital's production facility. Remove that
jumper before adding any otber Gruup G Jumpers. Group H has a
factory machine inserted juaper b,etween HI and H2. Cut this jumper
befor':! adding any other Group H jumper.
IX. Stop Code Selection

3-4
3-4
3-4

Mechanical teleprinters, such ns those that operate at
110 baud,require stop bits after each character: transmitted so
that their mechanisms can coast to a predetermined starting

nosition before handling the next

ch~ra~ter.

The same restriction

~pplies to their receivers. To prevent the KlB/E from sending

It will be noted that in many cases two straps are
inserted in the same split lug. This is acceptable, but three
in the same lug would not be, nor would a diagonal run such
as from lug 1 to 4 or from lug 2 to 3. If such runs exi$t,
the strapping has been done incorrectly.

characters during this stopping inter.val, a stop bit counter i.
inserted in the KL8/E transmitter ci~cuitry. This counter l~r.its
the KL8/E to request another character from the program as soon
as it has send the' last information bit of the preceding character
but prohibits it fT.om sending that new character until an
appropriate stop bit interval has been counted out following the
transmission of the final information bit of the preceding
character. This counter is controlled by a split lug gT.OUp
labelled "J".
Group J

VIII. Speed Selection
A group of split lugs labelled "G" determine the
operating speed of each KLB/E, EA, EB etc. option. Another
spli t lug group labelled "H" determines whether the tranflmi tter
and receiver sections operate at the same speed. ,The COT.rect
strappings of groupsG & Ii an~ listed below for eac}l option:

Stop CtlCle

Devices Using This Stop Code

1 bit

electronic receiver devices operating
at ISO baud and above.

2 bits

Mechanical receiver uevices operating
at 110 baud.

The KLB/E and KL8/EA oontain a machine inserted jumper

DEC FORM NO 16-1022
ORA 108

SHEET

J£

f REV I

NUMBER
KLB-U-l

NUMBER
Kl..8-E-1
OF

.1:!l.-

DEC FORM NO 11-'022
ORA 108

SHEET

.J!...

0'

if!-

ENGINEERING SPECIFICATION
TITLE

CONTINUATION SHEET

KL8/E Asynchronous Data Control

that provides 2 stop bits (J2-J3), as 110 baud devices use
2 stop bits. To the best of the author's knowledge, all devices
opera ting at speeds abov€? 1'10 baud USE! electronic rec(~iver
systems (even though all other parts of the device may be mechanical), so the KL8/EB, BC, etc are provided with hand inserted
jumpers from J1 to J2, thus providing only 1 stop bit.

x.

Special Notes
In the upper right corner of schematic E-CS-M8650-0-1,
one will find points labelled E, H, and M. These, as indicated
in the notes on the cover sheet,are designations of pins on
the forty pin header at which point ca.bles connect to the
M8650 printed circuit board. Pin E is the input to the M8650
TTL logic circuitry in the receiver section. Pin H is the
output of a filter and Schmidt Trigger ci:rcui"t which convert
20 milliampere signals from the teleprinter keyboard to TTL
logic signals. Pin M is the output of an inverter and EIA/CCITT
level converter that convert EIA/CCITT received signals to
TTL logic signals. The cable thai.: is used for serving 20
milliampere devices (7008360) consists of a Mate-N-Lock
connector a.t one end and a 40 pin housing at the other. The
40 pin housing contains a jumper from pin E to pin H, so that
when that cable is plugged into the 40 pin header, a connection
will be established from the 20 milliampere receiving circuitry
to the receiving circuitry of the M8650. The cables that can
be used with EIA/CCITT interface devices (BC01V and BCOS::)
consist of a 25-pin male connector at one end and a 40 pin
housing at the other. In this housing there is a jump8r from pin
E to pin M, so that when this cable is plugged into the forty
pin header, a connection will be es tablished from th'2 EIA/CCITT
receiving circuitry to the receiving circuitry of the M8650
board.
It should be noted that the 175 ohm limitation cited
for Reader Hun control is actually unimportant, as the keyboard
and printer requirements (,f 1.50 ohm limitation on line resistance
are the ruling limitations.

I

NUMBER

KL8-E-l
DEC FORM NO 16-1022
ORA 108

SHEET

....ll-

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LEGEND

DIGITAL EQUIPME·NT CORPORATION
MAYNARD, MASSACHUSETTS

DOCUMENT
DOCUMENT
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PDP8/E Ml\INT. MANUAL VOL. II
PDP8/E MAl NT . MANUAL VOL. III .

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RESISTOR 14 7K 1/BW
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1303156

RESISTOR 34.BK, I/BW

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1304833

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DIGITAL EQUfPMENT CORPORATION

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MAYNARD, MASSACHUSETTS

PARTS LIST

MADE BY ..1. FERGUSON
DATE
11-30-70
1'Jl.. U· Q.-A.;.oF\~
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MAYNARD, MASSACHUSETTS

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BULLETIN 273B
BULLETIN 310B ..
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18~9137

TTY MANUAL PARTS (VENDOR)
ROLL TTY RIBBON

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2
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MADE BY BOB EMMA
DATE
12-22-70
ENG
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MAYNARD, MASSACHUSETTS

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1
DATE
ISSUED
SECT.
PROD ~"!. r;'
.
1
DATE cw-' -/1, /~f.' //;;..r/7

45

9008386

46

9008390 ,

FUSE 25A 125V ABC25 BUSSMAN
FUSE lOA 250V ABC10 BUSSMAN

f:I;

~

~-

N
I'-

N
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I

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II:

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47
48

9007208
9008527

FUSE .5A 250V AGC ~ BUSSMAN
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49

9007242

50

1

1

1
1
1

1
1
1

FUSE HOLDER

5

5

1210191-0

CIRCUIT BREAKER lOA (l15V)

1

-

51

12-1Q_:3~4

CIRCUIT BREAKER

-

1

52

1110181
1102915
1210263

1

-

2

1
2

2

2

2
'2

2

53
54
55
56
57

--

NUT TOGGLE TINNE~~
BUBHING INS. FLANGED
WASHER SCR. ~ I.n.

9008426
9008418
1001776

CAP. IMFD 35VDC

-~

-

60

<;:-'CC6906

61

A-DC-530937S-0-0

62
63
64
65
66

A-DC-5309376-0-0

2

1

9006021-1
9006633
9008407-1

TITLE
POWER SUPPLY
.,-

.

-

.. _-

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1

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LUG. TURRET #6-32
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2

2
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2
2
SCR, HD. PAN, PHL #6-32 X 5L16 LG
7 7
WASHER INT TOOTH #6
~8 ~8
4 4
SCR.: 'l'HD CUTTING HD. PAN, PHL- #e~32X3/8'
SIZE CODE
NUMBER
ASSY NO.
E-UA-H724-0-0
H724-0-0
SHEET 3
OF 7
0151. T G"'l
T

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DIGITAL EQUIPMENT CORPORATION

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- .•9008395

58

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0

DESCRIPTION

DWG NO./ PART NO.

~

-

kIST~

PARTS

MADE BY
BOB EMMA
12-22-70
DATE
ENG
C7/~..r....
/-20-71
DATE

RFV,

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J

I

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QUANTITY / VAR IATIO N

MAYNARD. MASSACHUSETTS

MADE BY BOB EMMA
12-22-70
DATE
ENG
E N KITE
DATE
1 .?() ·71
ITEM
NO.

PARTS LIST

CHECKED.JOHN QUINN
1-20-71
DATE
PROD
PAUL FAZIO
DATE
1-25-71

AAAn",,"

68

0

DESCRIPTION

DWG NO./PART NO.

r'"7

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'I
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1

...... "".",n.

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,c:t;
I

I

~

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N
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N
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II:

I·

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A

A

9006072-1

SCR, RD, PAN, PHL #10-32 X 7/16 LG

8

8

69
70

9006635
9006022-2

WASHER, INT TOOTH # 10
SCR, HD FLAT, PHL #6-32 X 5/16 LG

24 24
8

8

71

9006029-2

SCR HD FLAT, PHL #6-32 X 1/4 LG

2

2

72

9008409-2

SCR, HD FLAT

73
,74
75
76

9006058-3
9006637

SCR HD TRUSS. PHL # 1/4-20 X 3/4 LG
WASHER INT TOOTH #1/4
SCR, HD PAN, PHL #4-40 X 5/16 LG
NUT, KEPS #4-40

2
4

2
4

4

4

2
2

2
2

2
2
12
2

2
2
12
2

13 13
4 4

9006010-1
9006557

,_y~

#8-18 X 1/2 LG

77

9006632

78
79
80

9007842-1
9008915-1
9006039-1

WASHER INT. TOOTH #4
SCR, HD PAN, PHL #6-32 X 3/16 LG
SCR, HD PAN, PHL #10-32 X 11/16 LG
SCR, HD PAN, PHL #8-32 X 1/2 LG

81

9006634

WASHER, INT TOOTH #8

82
83
84
85
86

9006563
9006022-1
9006026-1
9008412-5
9008408-1

87

9006561

NUT, KEPS #8-32
SCR, HD, PAN, PHL #6-32 X 3/8 LG
SCR, HD, PAN, PHL #6-32 X 3/4 LG
SCR, HD, ROUND, SLOT #8-32 X 4 5/8 LG
SCR, HD PAN SELG CUTTING &FORM 6-32X~LG
NUT, HEX #8-32

AA'

Q()()7h49

TITLE

WASHER .( EXT TOOTH) #6
ASSY NO.
POWER SUPPLY (H724)
E-UA-H724-0-0
SHEET 4
OF 7

CEC FORM NO.16 1031

I

II:

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12 12
16
2
4
1

16
2
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FI Fe V . ECO NO

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H724-0-0

1

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F:t;
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ITEM
NO.

DESCRIPTION

DWG NO./ PART NO.

89

:3008410·~5

SCR. lID ROUND SLOT #8-32 X 2 9/16 LG

90
91

30084.1~-5

90084Clll

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92

9008203

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93

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94

9008418

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95

9008068

96

1

1

2

2

2

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2

2

2

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1

1

9008439

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1

1

97

9006071-1

SCR

R

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98

9007906

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SPLIT LOCK

R

R

99

9007081

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HOLUB

1

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100
101

9006660
9008414

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4

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102
103

9008417
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14 14

105

9107360-00

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BLK

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106
107

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9107360-55

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RED

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110

9007917

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10

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J.

H72A.-0-0

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MAYNARD, MASSACHUSETTS

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DATE
12-22-10
ENG
C~/~~/- 20- 7/
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111

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9

9

112

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1

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3

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114

9007926
9107250

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9107420-29

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9107360-99
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119
120
121

7007006-2
9006861

122

AJ RA/R

9007919
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250 FLAG 10-20 AWG

1
6
'1
1

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-

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6

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123 _.
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1

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1

125

90-06674

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2

2

126
127

90-06653
1209379-01

#6 FLAT WASHER
PIN CONTACT FEMALE MATE-N-LOCK

2
4

2
4

128

9008836

CONN SOLDERLESS #42566-1 AMP

4

4

O-CS· #7?4-(7- /
REF p-CS -#7r~.I9-/

eEF
129

9107430-29

130

9107350-77

C/RCL//T 5CHEM/?T/C
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DRA 110

A/E tA/E

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TITLE

DEC FORM NO.16 1031

,-- I--

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SHEET 6
OF 7

AlE ~/E
SIZE CODE

A PL
DIST.

r

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PEV. ECO NO,

U~

H72A.-0-0

T

I

I

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...

DIGITAL EQ.UIPMENT CORPORATION
MAYNARD. MASSACHUSETTS

MADE BY BOB EMMA
12-22-70
DATE
ENG
E N KITE
1-20-71
DATE
ITEM
NO.

PARTS LIST

OWG NO./ PART NO.

131
132

12-11348
A-PI-3700030-0-0

CHECKED JOHN QUINN
1-20-71
DATE
PROD
PAUL FAZIO
1-25-71
DATE

POWER SUPPLY (H724)
DEC FORM
ORA 110

DEC 16-(325)-I031-N870

I

SECTION
1

ISSUED SECT.
1

OEseRI PTiON

R-TTA-H724-0-0
SHEET
7 OF

I
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N

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1
1

FUSE HOLDER
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TITLE

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r-tt:

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DIST.

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