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May 1977

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Document:	10.50.02 7707 RSTS-E 2780
Order Number:	DEC-11-XPDAO-C-D
Revision:
Pages:	4
Original Filename:	http://bitsavers.org/pdf/dec/spd/10.50.02_7707_RSTS-E_2780.pdf

OCR Text

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Software Product Description
PRODUCT NAME:

RSTS/E-2780 (CTS-500-2780), Version 3

SPD 10.50.2

DESCRIPTION:
The RSTS/E-2780 Emulator runs as a user job under
a suitably equipped RSTS/E or CTS-500 system, providing emulation of an IBM 2780 Remote Batch Terminal. It will support transmission and reception
from/to card reader and line printer, and/or mass
storage devices, such as disk and magnetic tape.
General characteristics of DIGITAL's PDP-11 based
2780 products are given in Section B.

OPTIONAL SOFTWARE SUPPORTED:
None

The RSTS/E-2780 transmits files stored on any medium supported by the host operating system. It stores
files on any output medium supported by RSTS/E except DECtape. Magnetic tape operation may cause
timeout errors, unless the tape is positioned at the
start of the file when transmission or reception is
about to begin. In addition, files can be printed on
any line printer supported by the host operating system except the LS-11, a 60 line-per-minute printer.
(Such printers can be used in off-line mode, however,
wherein they print files temporarily stored on disk or
tape.)

UPDATE POLICY:
Software Updates, if any, released by DIGITAL during
the one (1) year period following installation, will be
provided to the customer for a media charge. After
the first year, updates, if any, will be made available
according to then prevailing DIGITAL policies.

RSTS/E-2780 also supports a spooling feature,
wherein users running with the RSTS/E-2780 can
queue one or more files for subsequent transmission.
Due to the processing requirements of the 2780 protocol, RSTS/E (CTS-500) response time may incur
perceptible degradation during transmission or reception.

MINIMUM HARDWARE REQUIRED:
• Any valid RSTS/E (CTS-500) configuration with sufficient memory for the expected number of users,
plus 8K words of memory to accomodate the Emulator.
• DP11, DU11, or DUP11 Synchronous Line Interface
• KG11-A Communications Arithmetic Element
OPTIONAL HARDWARE SUPPORTED:
Any mass storage device except DECtape supported
by RSTSE (or CTS-500) can be used as a source or
target of transmission files.
PREREQUISITE SOFTWARE:
One of the following operating systems:
• RSTS/E Operating System, Version 6B
• CTS-500 Operating System, Version 3

July 1977

TRAINING CREDITS:
None
SUPPORT CATEGORY:
A - Software Support will be provided as listed in the
Software Support Categories Addendum to this SPD.

ORDERING INFORMATION:
This software is furnished under a license for use on
a single CPU and can be copied and modified (with
inclusion of DIGITAL's copyright notice) only for use
on such CPU, except as may otherwise be provided
in writing by DIGITAL.
Standard options with no support services are only
available after the purchase of one supported license.
When a software license is ordered without .support
services, the category of support applicable to such
software is Category C.
Source and/or listing options are only available after
a source license agreement is in effect.
The following key (D, E, F, T, V, <Z) represents the
distribution media for the product and must be specified at the end of the "0" number, Le., OPD10-AD =
binaries on 9-track magnetic tape.
D
9-track Magnetic Tape
E
RK05 Disk
F
7-track Magnetic Tape
T
RK06 Disk
Flexible Diskette
V
Z
No hardware dependency
Standard Options
OPD10 -A- Sin g Ie - use Ii c ens e, bin a r i e s,
documentation,
support services
(media: 0, E, F, T)· and (media: V) for
RPR02, RP04, RP05 or RP06 diskbased CTS-500 systems with RX11, no
RK11 and no magnetic tape.

DEC-11-XPDAO-C-D

SPD 10.50.2

RSTS/E-2780 (CTS-500-2780), Version 3
-2QPD10 -C- Single-use license, binaries, documentation, no support services (media: D,
E, F, T) and (media: Y) for RPR02,
RP04, RP05 or RP06 disk-based CTS500 systems with RX11, no RK11 and
no magnetic tape.
QPD10 -D- Single-use license only (media: Z)
Source/Listing Options
QPD10 -E- All sources (media: D, E, T)
QPD10 -F- Listings (media: R)
Update Options
Users of RSTS/E-27BO (CTS-500/E-27BO) whose
specified Support Category warranty has expired may
order under license the following software update at
the then current charge for such update. The update
is distributed in source or binary form on the appropriate medium and includes no installation or other
services unless specifically stated otherwise.

QPD10 -H- Binaries, documentation (media: D, E,
F, Y)
QPD10 -N- Source update (media: D, E)
Users of RSTS/E-27BO (CTS-500/E-27BO) whose
specified Support warranty has not expired may order
under license the following software update for the
then current media charge. The update is distributed
in source or binary form on the appropriate medium
and includes no installation or other services unless
specifically stated otherwise.
QPD10 -W- Binaries, documentation (media: D, E,
F, Y)
ADDITIONAL SERVICES:
None
010.50.2

RSTS/E-2780 (CTS-500-2780), Version 3

SPD 10.50.2

-3SECTION B: 2780 Emulator GENERAL DESCRIPTION

2780 Emulator is the collective name for the set of
software products that allows various DIGITAL operating systems to emulate the operation of an IBM 2780
Model 1 or 2 Data Transmission Terminal with the
multiple record option. Emulation of the 2780 permits
communication between such DIGITAL systems and
(1) the following IBM Remote Job Entry programs
supporting the device: OS/HASP, OS/ ASP, DOSPOWER and OS/RJE, or (2) a second DIGITAL supplied 2780 Emulator.
The following DIGITAL operating systems support the
Emulator for the 2780 Model 2: RSTS/E (CTS-500),
RSX-11D, RSX-11M, RT-11 and DECsystem-101 . In
addition, a COS-310 based emulator is available
which emulates the Model 1 2780. Section A gives the
distinguishing features of the particular 2780 Emulator
described by this SPD. The remainder of this section
describes items common to all PDP-11 2780 emulators.
OPERATION:
After the system operator starts the 2780 Emulator, it
solicits and responds to console command input.

Transmission: All 2780 Emulators can transmit data
from card readers, if they are present in the system,
and transmit data files from disk storage devices. The
RSTS/E 2780 Emulator has the added capability of
spooling or queueing transmission requests from
timesharing users.
All 2780 Emulators transmit EBCDIC and binary data.
Since the host systems use the ASCII character set,
however, they accept ASCII characters for transmission and then perform automatic character conversion. No conversion is performed on binary data.
The physical units of data that are transmitted are
called blocks. Blocks are divided into logical units
called records. Maximum block size is 400 characters; maximum record size when transmitting to IBM
operating systems is 80 characters, and when. communicating with other 2780's or 2780 Emulators, the
record size is variable up to 132 characters. Records
that are less than maximum allowable are either extended to the maximum by blank filling, or transmitted as is, at the user's option. Up to seven (7) records
can be transmitted per block.
1Umited
to
2780
communication.

mode

only

for

PDP-11

Reception: All 2780 Emulators can print received
character data on a line printer, if one is present in
the system. In most cases, the software simulates limited-function vertical format control (VFC) by providing Top of Form (Skip to Channel 1), Print-andSpace-1, -2, or -3 line(s) functions, and skip to channels 2 through 8, all of which cause modulo 8 line
space operation--i.e., skip to the next line which is an
even multiple of 8 from Top-of-Form. Both 64- and
96-character line printers are supported. However,
support of line printers which are too slow to keep up
with the speed of the communications link (i.e., LS11
and LV11) is limited to "off-line" or DIGIT AL-toDIGITAL usage, because their speed can cause timeout errors in an IBM system.
All Emulators write files onto disk storage devices. In
such cases, a separate file is created for each received file.
All 2780 Emulators receive EBCDIC or binary data.
They can automatically convert EBCDIC data to ASCII
upon reception, or EBCDIC data can be written to a
file by the use of the binary mode.
Maximum receive block size is four hundred (400)
characters. The maximum receive record size is a
two-character escape code, plus one hundred thirtytwo (132) data characters. Up to seven (7) records
can be received per block.
All Emulators provide automatic answer to dial-in
rings.
Modems and Data Links: All 2780 Emulators support
operation over synchronous data links, in Point-toPoint Contention mode only, at speeds up to 4800
baud. Bell 201 or 208 modems or equivalent are
specified. Operation with other modems is not precluded, but warranted support does not apply in
these cases.
Data link control characters are supplied automatically by the Emulators. On transmission errors, the Emulators will re-try up to seven (7) times· before declaring the link dead.
Configuring PDP-11 2780 Emulator Systems: Configuration requirements for each Emulator are defined in
Section A. Briefly, the PDP-11 2780 Emulators require
the following hardware beyond the standard operating
system configurations:

RSTS/E-2780 (CTS-500-2780), Version 3

SPO 10.50.2

-4• DP11, DU11 or DUP11 Synchronous Line Interface
• KG11-A Communications Arithmetic Element
• KW11-L or KW11-P clock
• 8K words of additional memory beyond the
minimum may be required (refer to Section A)
TRAINING CREDITS:
No training credits are included in the 2780 Emulator
Software license charges. Training courses are not
required in order to operate the product.
SUPPORT CATEGORY:
The initial binary package carries Category A support.
Sources have Category C support.
Installation will be deemed complete in the case of
connection with IBM when:
• The customer's 360/370 configuration includes a
2701 Data Adapter, a 2703 Transmission Control
Unit, a 3704 or 3705 Transmission Controller, or a
System/370 Model 135 Integrated ommunications
Adapter.
• A DIGITAL sample procedure included with the
software has been successfully executed.
Installation in DIGITAL-to-DIGITAL operation will be
deemed complete when DIGITAL supplied files can
be successfully transmitted in both directions.
CUSTOMER RESPONSIBILITIES:
BEFORE installation of the SOFTWARE, the customer
must:

1. Obtain, install, and demonstrate operational to
DIGITAL's satisfaction any modems and other
equipment and facilities necessary to interface
to DIGITAL's communications line interfaces and
terminals.
2. Install or have installed all hardware, including
terminals, to be used on the system.
3. Generate for terminal support any and all IBM
systems that will be communicating with the Emulator, to DIGITAL's satisfaction.
4. Make available to DIGITAL personnel all hardware, including communications facilities and
terminals, to be used during installation and acceptance testing for a reasonable period. of time
each day as mutually agreed upon by DIGITAL
and customer, until acceptance criteria are satisfied.
5. Provide access privileges and machine time on
any and all IBM systems on which the installation is to be performed.
6. When communicating with IBM, make available
to DIGITAL personnel an IBM 360/370 job
stream with data, to run via the 2780 Emulator
on-line to a 360/370 in accordance with the configuration specifications outlined above.
Delays caused by any failure to meet these responsibilites will be charged at the then prevailing rate for
time and materials.
The following table summarizes some of the features of
the PDP-11 2780 Emulators.

MINIMUM
CONFIGURATION
SUMMARY
(see Section A)

HOST
OPERATING
SYSTEM

MAXIMUM
SPEED

OUTPUT
DEVICES
SUPPORTED

INPUT
DEVICES
SUPPORTED

FORMS
CONTROL
SUPPORTED

SPOOLING
SUPPORTF.D

MODEMS AND
IBM
OPERATING
SYSTEMS
SUPPORTED

Any standard RSX-11 D or
RSX-11 M configuration
with at least 16K words of
memory (for 11 M), at least
56K words of memory (for
110), DU11, DP11 or

RSX-11D
orRSX-11M

4800
baud

Line printer or
any Files-11
device except
DECtapeand
paper tape punch

Card reader or
any other Files-11
device except
DECtape

Top of Form,
Skip 1, 2, or 3
lines, Skip
modulo 8,
Horizontal forms
control

Yes on
reception,
Noon
transmission

Bell 208 or 201
or equivalent;
OS/RJE,
OS/HASP,
DOS/POWER,
OS/ASP

RSTS/2780
(CTS-500/27BO)

Minimal RSTS/E or CTS500 system consistent
with number of users and
expected application, plus
BK words of memory,
DU11, DUP11, or DP11,
KG11

RSTS/E
(CTS-500)

4800
baud

Line printer or
any disk except
flexible diskette,
magnetic tape
(limited)

Card reader or
any disk,
magnetic tape
(limited)

Top of Form,
Skip 1, 2, or
3 lines,
Horizontal forms
control

Yes

Same as above

RT-11/27BO
(COS-350/27BO)

Disk-based
Foreground/Background
RT -11 or COS-350 system
with 16K words of
memory, DU11 or DP11
or DUP11, KW11-L,
KG11-A

RT-11
(COS-350)

4800
baud

Line printer or
Card reader,
Top of Form,
any disk
paper tape
Skip 1, 2, or
supported by
reader, or any
3 lines, Skip
RT-11 (COS-350) disk supported by modulo 8,
RT -11 (COS-350) Horizontal forms
control

Same as above

CHARACTERISTIC
EMULATOR NAME

RSX-11 D/2780
RSX-11 M/27BO

DUP11, KG11

010.50.2