📄 rfc189.txt
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Braden [Page 13]
RFC 189 Interim NETRJS Specifications July 1971
APPENDIX C
Carriage Control
The carriage control characters sent in a printer channel by NETRJS
conform to IBM's extended USASI code, defined by the following table:
CODE ACTION BEFORE WRITING RECORD
blank Space one line before printing
0 Space two lines before printing
- Space three lines before printing
+ Suppress space before printing
1 Skip to channel 1
2 Skip to channel 2
3 Skip to channel 3
4 Skip to channel 4
5 Skip to channel 5
6 Skip to channel 6
7 Skip to channel 7
8 Skip to channel 8
9 Skip to channel 9
A Skip to channel 10
B Skip to channel 11
C Skip to channel 12
Braden [Page 14]
RFC 189 Interim NETRJS Specifications July 1971
APPENDIX D
Network/RJS Command Summary
Terminal Control and Information Command
SIGNON First command of a session; identifies VRBT by giving
its terminal id.
SIGNOFF Last command of a session; RJS waits for any data
transfer in progress to complete and then closes all
connections.
STATUS Outputs on the remote operator console a complete
list, or a summary, of all jobs in the system for
this VRBT, with an indication of their processing
status in the Model 91.
ALERT Outputs on the operator console the special "Alert"
message, if any, from CCN computer operator. The
Alert message is also automatically sent when the
user does a SIGNON, or whenever the message changes.
MSG Sends a message to CCN computer operator or to any
other RJS terminal (real or virtual). A message from
the computer operator or another RJS terminal will
automatically appear on the remote operator console.
Job Control and Routing Commands
Under CCN's job management system, the default destination for output
is the input source. Thus, a job submitted under a given VRBT will
be returned to that VRBT (i.e., the same terminal id), unless the
user's JCL overrides the default destination.
RJS places print and punch output described for a particular remote
terminal into either an Active Queue or a Deferred Queue. When the
user opens his print or punch output channel, RJS immediately starts
sending job output from the Active Queue, and continues this queue is
empty. Job output in the Deferred Queue, on the other hand, must be
called for by job name, (via a RESET command from the remote opera-
tor) before RJS will send it. The Active/Deferred choice for output
from a job is determined by the deferral status of the VRBT when the
job is entered; the deferral status, which is set to the Active
option when the user signs on, may be changed by the SET command.
Braden [Page 15]
RFC 189 Interim NETRJS Specifications July 1971
SET Allows the remote user to change certain properties
of his VRBT for the duration of the current session;
(a) May change the default output destination to be
another (real or virtual) RJS terminal or the central
facility.
(b) May change the deferral status of the VRBT.
DEFER Moves the print and punch output for a specified job
or set of jobs from the Active Queue to the Deferred
queue. If the job's output is in the process of
being transmitted over a channel, RJS aborts the
channel and saves the current output location before
moving the job to the Deferred Queue. A subsequent
RESET command will return it to the Active Queue with
an implied Backspace (BSP).
RESET Moves specified job(s) from Deferred to Active Queue
so they may be sent to user. A specific list of job
names or all jobs can be moved with one RESET
command.
ROUTE Re-routes output of specified jobs (or all jobs)
waiting in the Active and Deferred Queues for this
VRBT. The new destination may be any other RJS
terminal or the central facility.
ABORT Cancels a job which was successfully submitted and
awaiting execution or is current executing in the
Model 91. If he cancelled job was in execution, all
output it produced ill be returned.
Output Stream Control Commands
BSP (BACKSPACE) "Backspaces" output stream within current sysout data
set. Actual amount backspaced depends upon sysout
blocking but is typically equivalent to a page on the
line printer.
CAN (CANCEL) (a) On an output channel, CAN causes the rest of the
output in the sysout data set currently being
transmitted to be omitted. Alternatively, may
omit the rest of the sysout data sets for the job
currently being transmitted; however, the remain-
ing system and accounting messages will be sent.
Braden [Page 16]
RFC 189 Interim NETRJS Specifications July 1971
(b) On an input channel, CAN causes RJS to ignore the
job currently being read. However, the channel
is not aborted as a result, and RJS will continue
reading in jobs on the channel.
(c) CAN can delete all sysout data sets for specified
job(s) waiting in Active or Deferred Queue.
RST (RESTART) (a) Restarts a specified output stream at the begin-
ning of the current sysout data set or, option-
ally, at the beginning of the job.
(b) Marks as restarted specified job(s) whose
transmission was earlier interrupted by system
failure or user action (e.g., DEFER command or
aborting the channel). When RJS transmits these
jobs again it will start at the beginning of the
partially transmitted sysout data set or, option-
ally, at the beginning of the job. This function
may be applied to jobs in either the Active or
the Deferred Queue; however, if the job was in
the Deferred Queue then RST also moves it to the
Active Queue. If the job was never transmitted,
RST has no effect other than this queue movement.
REPEAT Sends additional copies of the output of specified
jobs.
EAM Echoes the card reader stream back in the printer or
punch stream, or both.
Braden [Page 17]
RFC 189 Interim NETRJS Specifications July 1971
+---------------------------------+
| RJS |
+---------------------------------+
^ | ^ | |
| v | v v
+------------------------------+
CCN -- Server | |
| NETRJS |
+------------------------------+
^ | ^ | |
| v | v v
+----------+ +---------------+
| TELNET | | Data Xfer | (server)
| Server | | 3rd Level |
+----------+ +---------------+
^ | ^ | |
---------------------|-----|----------|-----|-----|-----------------
O | O | | | |
p | p | C| C| C|
e I | e O| I h| O h| P h|
ARPA r n | r u| n a| u a| u a|
a p | a t| p n| t n| n n|
Network t u | t p| u n| p n| c n|
o t | o u| t e| u e| h e|
r | r t| l| t l| l|
---------------------|-----|----------|-----|-----|-----------------
| | | | |
| V | V V
+----------+ +---------------+
| TELNET | | Data Xfer | (user)
| Server | | 3rd Level |
+----------+ +---------------+
Remote ^ ^ | |
/ "Virtual | | |
User / Remote Batch | V V
/ Terminal" +------------------+
/ | |
V | NETRJS |
+---------+ | User |
/ |<------------->| Process |
/ Console | | |
+____________| +------------------+
^ | |
| V V
(file) (file) (file)
FIGURE 1. SCHEMATIC OF NETRJS OPERATION
Braden [Page 18]
RFC 189 Interim NETRJS Specifications July 1971
+------+ +------+ +-----------+ +---------------------+
TRANSACTION <--> | X'FF'| |Filler| |Sequence | | Data Length |
| | | Count| | Number | | in bits |
+------+ +------+ +-----------+ +---------------------+
+------+
| X'00'| { RECORD } *
| |
+------+
<---- n text bytes ------>
+--+-----+ +--------+ +--------+ +--------+
TRUNCATED <--> |11|Devid| | n (8) | | Text | . . . | Text |
RECORD | | (6) | | | | (8) | | (8) |
+--+-----+ +--------+ +--------+ +--------+
/ \
| +---+----+ | *
| |110| n | (n blanks) |
| | |(5) | |
| +---+----+ |
| |
+--+-----+ / +---+----+ +--------+ |
COMPRESSED<--> |10|Devid|< |111| n | |Char- | (n replications |
RECORD | | (6) | \ | |(5) | | acter | of "Character") |
+--+-----+ | +---+----+ +--------+ |
| |
| +--+-----+ +--------+ +--------+ |
| |10| n | | Text | . . .| Text | |
| | | (6) | | (8) | | (8) | |
| +--+-----+ +--------+ +--------+ |
\ /
+------+
| X'00'|
| |
+------+
FIGURE 2. DATA TRANSFER PROTOCOL IN NETRJS
[ This RFC was put into machine readable form for entry ]
[ into the online RFC archives by Tony Hansen 11/98 ]
Braden [Page 19]
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