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DEC-11-XPDDD-B-D

July 1976

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Document:	10.76.01 7607 RT-11 2780
Order Number:	DEC-11-XPDDD-B-D
Revision:
Pages:	4
Original Filename:	http://bitsavers.org/pdf/dec/spd/10.76.01_7607_RT-11_2780.pdf

OCR Text

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Software Product Description
PRODUCT NAME:

RT-11/2780, Version 2
SPD 10.76.1
COS-350/2780, Version I, Remote Data Communications Package (RDCP)

SECTION A: RT-II/2780 (COS-350/2780) SPECIFIC INFORMATION
DESCRIPTION:
RT -11/2780 (COS-350/2780) provides emulation of
an IBM 2780 remote batch terminal. It runs under
the RT-II Foreground/Background monitor on a
suitably equipped RT-II (version 2B or later) or
COS-350 system. General characteristics of DIG ITAL's PDP-II based 2780 products are given in
Section B of this Software Product Description.
Any RT-II or COS-350 supported disk device.
card reader or paper tape reader can be used as a
source of transmission tiles. Any RT-Il or COS350 supported disk device or line printer except
the LS II and LV 11 can be used to receive files.
(The LS 11 or LV 11 can be used in "off-line"
mode, however. to print files temporarily stored on
disk.)
The performance characteristics for the system vary
depending primarily on whether the RT-Il/2780
(COS-350/2780) is running the foreground or
background. At 4800 baud with the 2780 Emulator
runnmg in the foreground on a PDP-II /05.
between 50 percent (during transmission/reception)
and 70 percent (when the link is idle) of the CPU
is available for a background job. Because foreground has priority on system resources, background operation of the 2780 Emulator is possible
only with a foreground job that allows the 2780
Emulator at least 90 milliseconds out of every 100
to service time-critical protocol requirements.
Hence. computational tasks, for example, should
be run in the background, with the 2780 Emulator
running in the foreground.
MINIMUM HARDWARE REQUIRED:
Any valid RT-II Foreground/Background system
configuration (except LSI-II based systems) with:
• at least 16K words of memory for 2780 operation
in the background
• at least 24K words of memory for 2780 operation
in the foreground
• KWII-L Line Frequency Clock
• a disk device
• KG II-A Communications Arithmetic Element
• DPI L DU I L or DUPII Synchronous Line Interface (NOTE: The line interface must have a
higher priority than the RX II floppy disk, should
one be present on the system)
July 1976

OR. Anyone of the following ,DEC Datasystem
configurations:
• DS352 RX 11 Floppy-based system
• DS354 RK 11 DEC pack-based system
• DS356 RPR 11 Disk pack-based system
with:
• at least 32K bytes of memory for 2780 operation
in the background
• at least 48K bytes of memory for 2780 operation
in the foreground
A DU II Synchronous Line interface and KG 11
Communications Arithmetic Element are included
in the COS-350/2780 package. (NOTE: The line
interface must have a higher priority than the
RX 11 floppy disk on the DS352 and DS356
systems.)
OPTIONAL HARDWARE SUPPORTED:
Any disk. paper tape reader. card reader or line
printer supported by RT-II or COS-350 except
LS 11 and LV 11. For COS-350 systems, there is a
maximum of one (1) RX 11 controller per system.
PREREQUISITE SOFTWARE:
RT-II operating system. Version 2B or later
OR, COS-350 System Software. Version I or later
OPTIONAL SOFTWARE SUPPORTED:
None
TRAINING CREDITS:
None
SUPPORT CATEGORY:
A. for initial installation. Software Support will be
provided as listed in the Software Support Categories Addendum to this SPD. Subsequent licenses
can be purchased with Category C suppport.
Sources have Category C suppport.
UPDATE POLICY:
During the first year. Update Policy shall be in accordance with the Software Support Categories Addendum to this SPD. After the first year. updates.
if any. will be made available according to the
then prevailing DIG ITAL policies.

DEC-II-XPDDD-B-D

RT-11/2780 (COS-350/2780). Version 2

SPD 10.76.1
-2-

ORDERING INFORMATION:
This software is furnished under a license for use
on a single CPU and can be copied and modified
(with inclusion of DIG IT AL'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 and after either an OEM Agreement or EndUser Waiver of Support Agreement is in effect.
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 the purchase of at least one supported binary
license and after a source license agreement is in
effect.
The following key (C. D. E. N. R. Y. Z) represents
the distribution media for the product and must be
specified at the end of the "Q" or "DS" number.
i.e .. QJD63-AD = binaries on 9-track magnetic
tape.
C
DECtape
D
9-track Magnetic Tape
E
RK Disk (DECpack)
F
7-track Magnetic Tape
R
Microfiche
Y
Floppy Disk
No hardware dependency
Z
Standard Options
QJD63 -A- Single-use license. binaries. documentation. support services (RT-II not
included) (media: C. D. E. E Y)
QJD63 -D- Single-use license only. no support
services (media: Z)
Restricted Standard Options
DS3CC -A- Single-use license. binaries. documentation. communications subsystem.
support services (media: E. Y) for
COS-350 systems only
DS3CC -D- Single-use license only. with communicatiqns subsystem. no support
services (media: Z) for COS-350 systems only
Source/ Listing Options
QJD63 -E- All sources (RT-II not included)
(media: C. D. E. F. Y)
QJD63 -F- Listings (RT-II not included) (media:
R)
ADDITIONAL SERVICES:
None
DI0.76.1

RT-ll/2780 (COS-350/2780). Version 2

SPD 10.76.1
-3-

SECTION B: 2780 EMULATOR GENERAL
DESCRIPTION
2780 Emulator is the collective name for the set of
software products that allows various DIG IT AL
operating systems to emulate the operation of an
IBM 2780 Model I 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. DOS-POWER and OS/RJE.
or (2) a second DIGITAL supplied 2780 Emulator.
The following DIGITAL operating systems support
the Emulator for the 2780 Model 2:
DOS/BATCH-II (Version 8-08 or later). RSTS/E
(CTS-500/E). RSX-II D. RSX-II M. RT-II (COS350) and DECsystem-lO l . In addition. a COS-310
based emulator"' and a PDP-II memory-only 2780
are available. These emulate the Model I 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-II 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 (except for the memory-based 2780)
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 ASCI I
character set. however. they accept ASCII
characters for transmission and then perform automatic character conversion. 2 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.
ILimited to 2780 mode only for PDP-II communication.
2CORE and DOS/BATCH packages will accept full EBCDIC
character set from cards: the others accept only the subset that
has an ASCII equivalent.

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 I). Printand-Space-L -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 .. LS II and LV II) is limited
to "off-line" or DIG ITAL-to-DIG IT AL usage. because their speed can cause timeout errors in an
I.BM system.
All Emulators except the memory-based can 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 thirty-two (132) data characters. Up to seven (7) records can be received per block.
~ll Emulators provide automatic answer to dial-in
nngs.
Modems and Data Links: All 2780 Emulators support operation over synchronous data links. in
Point-to-Point Contention mode only. at speeds up
to 4800 baud. Some Emulators will operate at
speeds up to 9600 baud over full duplex private or
leased lines. Bell 20 I 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-II 2780 Emulator s..vstems: Configuration requirements for each Emulator are defined in Section A. Briefly. the PDP-II 2780 Emulators require the following hardware beyond the
standard operating system configurations:
• DPII. DU liar DUPII Synchronous Line Interface
• KG Il-A Communications Arithmetic Element
• K W I 1- L or K W 1 1-P clock
• 8K words of additional memory beyond the minimum may be required (refer to Section A)

RT-11127S0 (COS-350/27S0). Version 2

SPD 10.76.1
-4-

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 3601370 configuration includes a
2701 Data Adapter. a 2703 Transmission Control
Unit. a 3704 or 3705 Transmission ControlJer. or
a System/370 Model 135 Integrated Communications Adapter.
• A DIG IT AL sample procedure included with the
software has been successfully executed.
Installation in DIGITAL-to-DIGITAL operation
wilJ be deemed complete when DIG ITAL 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 DIG IT AL personnel all
hardware. including communications facilities
and terminals, to be used during instalJation
and acceptance testing for a reasonable period
of time each day as mutually agreed upon by
DIG IT AL 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 DIG IT AL 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 wilJ be charged at the then prevailing rate
for time and materials.
The following table summarizes some of the features of the PDP-II 2780 Emulators.

MINIMUM
CONFIGURATION
SUMMARY
(see Section A)

HOST
OPERATING
SYSTEM

MAXIMUM
SPEED

OUTPUT
DEVICES
SUPPORTED

INPUT
DEVICES
SUPPORTED

FORMS
CONTROL
SUPPORTED

SPOOLING
SUPPORTED

MODEMS AND
IBM
OPERATING
SYSTEMS
SUPPORTED

CORE/27S0

Any PDP-II except LSI-II
based products. SK words
of memory. clock. card
reader. line printer.
terminal. DU II or DPII.
KG II. paper tape reader
or cassette

None

9600
baud

Line printer
Note: Binary
output not
supported

Card reader

Top of form.
Skip I. 2. or 3
lines. Skip
modulo S

Bell 20S or 20 I or
equivalent:
OS/RJE.
OSIHASP.
DOS/POWER.
as/ASP

DOS/2780

Standard DOS/BATCH
contiguration with at least
16K words of memory.
clock. DU II or DPII·.
KG II. card reader and
line printer

DOS/BATCH-II

9600
baud

Line printer or
any disk

Card reader or
any disk

Line printer:
same as above.
All others: Top
of form.
Horizontal forms
control

Same as above

RSX-llD/2780
RSX-IIM/27S0

Anv standard RSX-II D or RSX-IID
RSX-II M configuration
or RSX-IIM
with at least 16K words of
memory (for II M). at least
56K words of memory (for
lID). DU II. DPII or
DUPIL KGII

4S00
baud

Line printer or
any Files-II
de~ice except
DECtape and
paper tape punch

Card reader or
Top of form.
any other Files-II Skip L 2. or 3
dey ice except
lines. Skip
DECtape
modulo S.
Horizontal forms
control

RSX-IID: Yes on Same as above
reception. no on
transmission
RSX-IIM: No

RSTS/27S0

Minimal RSTS/E or CTS500/E system consistent
with number of users and
expected application. plus
SK words of memory.
DUll. DUPII or DPII.
KGII

RSTS/E
(CTS-500/E)

4S00
baud

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

Card reader or
any disk.
magnetic tape
(limited)

Top of form.
Horizontal forms
control

Yes

Same as above

Disk-based
Foregrou nd 1 Background
RT-II system with 16K
words of memory. DU II
or DPII or DUPII.
KWII-L KGII-A

RT-II
(COS-350)

4S00
baud

Line printer or
any disk
supported by RTII (COS-350)

Card reader.
paper tape
reader. or any
disk supported by
RT-II (COS-350)

Top of Form.
Skip I. 2 or 3
lines. Skip
modulo S.
Horizontal forms
control

Same as above

CHARACTERISTIC
EMULATOR NAME

(CTS-500/E-27S0)

RT-11/27S0
(C05-350/27S0)

DI0.76.1