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⟦315c3af36⟧ Wang Wps File
Length: 9963 (0x26eb)
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Notes: CSSR STUDY PRIMER
Names: »4111A «
Derivation
└─⟦32539f54d⟧ Bits:30006181 8" Wang WCS floppy, CR 0369A
└─ ⟦this⟧ »4111A «
WangText
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CSSR STUDY PRIMER FOR CSSR COMMUNICATIONS
FRONT-END PROCESSOR…02……02…CSSR
A̲b̲b̲r̲e̲v̲i̲a̲t̲i̲o̲n̲s̲
ADCCP Advanced Data Communication Control Procedure
CR80 Christian Rovsing Computer Name
ETHERNET Local Area Net
LTU Line Termination Unit
PU Processor Unit
TOS Terminal Operating System
TTY Teletype Console
VAX Digital Equipment Computer Name
VDU Visual Display Unit
WDP Watchdog Processor
1̲ ̲ ̲D̲E̲M̲O̲ ̲S̲C̲E̲N̲A̲R̲I̲O̲S̲
- Demonstration of communication capabilities
- Demonstration of error detection and recovery
- Demonstration of configuration control at the CR80
1.1 D̲E̲M̲O̲N̲S̲T̲R̲A̲T̲I̲O̲N̲ ̲O̲F̲ ̲C̲O̲M̲M̲U̲N̲I̲C̲A̲T̲I̲O̲N̲ ̲C̲A̲P̲A̲B̲I̲L̲I̲T̲Y̲ ̲R̲E̲G̲A̲R̲D̲I̲N̲G̲
- ADCCP communication: CR80-CR80
- Ethernet communication: CR80-VAX
The capabilities are demonstrated by
- interactive VDU communication (refer below) between
a VDU on the VAX and a VDU on the remote CR80.
- file transfer (refer below) to/from a disk on the
VAX to a disk on the remote CR80 on request from
an operator at the VAX VDU position or the CR80
VDU position.
1.1.1 I̲n̲t̲e̲r̲a̲c̲t̲i̲v̲e̲ ̲V̲D̲U̲ ̲C̲o̲m̲m̲u̲n̲i̲c̲a̲t̲i̲o̲n̲
The communication makes it possible to send "one-VDU-
line-mesages" between the VAX and the remote CR80 VDU.
No synchronization is done.
1.1.2 F̲i̲l̲e̲ ̲T̲r̲a̲n̲s̲f̲e̲r̲
The VAX VDU operator (or the remote CR80 VDU operator)
can request the sending of one file from the VAX disk
to the remote CR80 disk (or vice versa).
A completion log is sent to the VAX VDU when the file
is stored at the remote CR80 disk. A completion log
is sent to the remote CR80 VDU.
The VAX VDU operator can request the remote CR80 to
send a specified file to the VAX disk.
A completion log is sent to the remote CR80 VDU and
the VAX VDU.
1.2 D̲E̲M̲O̲N̲S̲T̲R̲A̲T̲I̲O̲N̲ ̲O̲F̲ ̲E̲R̲R̲O̲R̲ ̲D̲E̲T̲E̲C̲T̲I̲O̲N̲ ̲A̲N̲D̲ ̲E̲R̲R̲O̲R̲ ̲C̲O̲V̲E̲R̲Y̲
at the CR80
The capabilities are demonstrated via
1) a PU switchover, while interactive/file communication
takes place
2) a LTU switchover, while interactive/file communication
takes place
The switchovers are provoked by switching the power
off in the active PU, LTU respectively.
1.2.1 R̲e̲c̲o̲v̲e̲r̲y̲ ̲L̲e̲v̲e̲l̲
The dualized CR80 functions as a "store and forward
message switch" and is responsible for messages for
which an acknowledgement has been given.
A message is either
- one VDU line or
- one file
The CR80 sends acknowledgement to the sender, when
the message is stored on disk.
1.3 D̲E̲M̲O̲N̲S̲T̲R̲A̲T̲I̲O̲N̲ ̲O̲F̲ ̲C̲O̲N̲F̲I̲G̲U̲R̲A̲T̲I̲O̲N̲ ̲C̲O̲N̲T̲R̲O̲L̲ ̲A̲T̲ ̲T̲H̲E̲ ̲C̲R̲8̲0̲
The capabilities are demonstrated by the following
operator commands
- boot of active PU
- boot of standby PU
- boot of active LTU with a specified protocol
- boot of standby LTU with a specified protocol
2̲ ̲ ̲O̲P̲E̲R̲A̲T̲O̲R̲ ̲I̲N̲T̲E̲R̲F̲A̲C̲E̲S̲
- VAX VDU operator interface
- Remote CR80 VDU operator interface
- Remote CR80 console operator interface
- CR80 console operator interface.
2.1 V̲A̲X̲ ̲V̲D̲U̲ ̲O̲P̲E̲R̲A̲T̲O̲R̲ ̲I̲N̲T̲E̲R̲F̲A̲C̲E̲
The VAX VDU operator has the following capabilities:
- transmission of one-line messages to the remote
CR80 VDU
- reception of one-line messages from the remote
CR80 VDU
- sending of a file transfer command to the VAX requesting
a specified file on the VAX disk to be set to the
remote CR80 disk, where it will be catalogued with
the same name
- sending of a file transfer command to the remote
CR80 PU requesting a specified file on the CR80
site to be sent to the VAX disk
- reception of completion log from the VAX having
received a file
- reception of completion log from the remote CR80
PU having received a file
- it is possible to queue file-transfer-commands
and one-line-messages at the VAX
2.2 R̲E̲M̲O̲T̲E̲ ̲C̲R̲8̲0̲ ̲V̲D̲U̲ ̲O̲P̲E̲R̲A̲T̲O̲R̲ ̲I̲N̲T̲E̲R̲F̲A̲C̲E̲
The remote CR80 VDU operator has the following capabilities:
- transmission of one-line messages to the VAX VDU
- reception of one-line messages from the VAX operator
- reception of a log concerning received/transmitted
files to/from the CR80 disk
- requests for VAX based files to be sent/received
to/from the remote CR80.
Actually the remote CR80 software could be executed
in a TOS environment, thereby allowing
- preparation of files
- inspection of files
from the operator console.
The VDU is used as a TTY device in scroll mode.
2.3 R̲E̲M̲O̲T̲E̲ ̲C̲R̲8̲0̲ ̲C̲O̲N̲S̲O̲L̲E̲ ̲O̲P̲E̲R̲A̲T̲O̲R̲ ̲I̲N̲T̲E̲R̲F̲A̲C̲E̲
The remote CR80 console operator has the following
possibilities:
- boot of system
- eventually the operating system being loaded can
prompt the operator for the protocol to be booted
into the LTU
- eventually TOS (the Terminal Operating System)
could be used.
2.4 C̲R̲8̲0̲ ̲C̲O̲N̲S̲O̲L̲E̲ ̲O̲P̲E̲R̲A̲T̲O̲R̲ ̲I̲N̲T̲E̲R̲F̲A̲C̲E̲
The CR80 console operator has the following capabilities:
- boot of active PU
- boot of standby PU
- specify the protocol to be booted into the active,
standby LTU respectively during start-up
- set a failed LTU in-service and specify the protocol
to be used in the LTU boot
- reception of
- start-up completion log
- switchover completion log
3̲ ̲ ̲F̲U̲N̲C̲T̲I̲O̲N̲A̲L̲ ̲C̲A̲P̲A̲B̲I̲L̲I̲T̲I̲E̲S̲ ̲F̲O̲R̲
- Dualized CR80
- Remote CR80
3.1 D̲U̲A̲L̲I̲Z̲E̲D̲ ̲C̲R̲8̲0̲ ̲F̲U̲N̲C̲T̲I̲O̲N̲S̲
3.1.1 C̲o̲m̲m̲u̲n̲i̲c̲a̲t̲i̲o̲n̲s̲ ̲F̲u̲n̲c̲t̲i̲o̲n̲s̲
1. Receive, store, checkpoint, send ack on messages
from the VAX
2. Receive, store, checkpoint, send ack on messages
from the VAX
3. Transmit, receive ack, cancel checkpoint, cancel
file to the VAX
4. Transmit, receive ack, cancel checkpoint, cancel
file to remote CR80
3.1.2 E̲r̲r̲o̲r̲ ̲D̲e̲t̲e̲c̲t̲i̲o̲n̲ ̲a̲n̲d̲ ̲R̲e̲c̲o̲v̲e̲r̲y̲ ̲F̲u̲n̲c̲t̲i̲o̲n̲
3.1.2.1 P̲U̲
1. Sending keep-alive messages to the WDP
2. Receiving exceptions from the active LTU
3. Command the WDP to switch to standby LTU
4. Standby-PU: Continue communication on the action
LTU based on check points
5. Active-PU: Continue communication on the standby
LTU based on check points.
3.1.2.2 W̲D̲P̲ ̲(̲W̲a̲t̲c̲h̲d̲o̲g̲ ̲D̲o̲g̲ ̲P̲r̲o̲c̲e̲s̲s̲o̲r̲)̲
1. Reception of keep-alive messages
2. Sending of go-active and to standby PU
3. Reception of switch to standby LTU command and
execution
4. Sending operator console commands to the PU operating
system.
3.1.3 C̲o̲n̲f̲i̲g̲u̲r̲a̲t̲i̲o̲n̲ ̲C̲o̲n̲t̲r̲o̲l̲ ̲F̲u̲n̲c̲t̲i̲o̲n̲s̲
- Start-up of WDP
- Start-up of processes in active PU
- Start-up of processes in standby PU
- Creation of devices
- disk
- LTUs
- VDU
- Reception of Operator Commands
- re-insert a failed LTU and boot according to
the protocol type.
3.2 R̲E̲M̲O̲T̲E̲ ̲C̲R̲8̲0̲ ̲F̲U̲N̲C̲T̲I̲O̲N̲S̲
3.2.1 C̲o̲m̲m̲u̲n̲i̲c̲a̲t̲i̲o̲n̲ ̲F̲u̲n̲c̲t̲i̲o̲n̲s̲
- Receive, store messages from the CR80. Send ack
to VAX having stored a file.
- Analyse the received messages
- a VDU line
- a part of a file
- a command to transfer a file to the VAX
- a command, that a file transfer of a specified
file will now take place
- Receive VDU lines from the VDU
- Send VDU lines to the VDU
- Transfer VDU lines to the CR80
- Transfer files lines to the CR80
3.2.2 E̲r̲r̲o̲r̲ ̲D̲e̲t̲e̲c̲t̲i̲o̲n̲ ̲a̲n̲d̲ ̲R̲e̲c̲o̲v̲e̲r̲y̲ ̲F̲u̲n̲c̲t̲i̲o̲n̲
None, give up if PU or LTU failure
3.2.3 C̲o̲n̲f̲i̲g̲u̲r̲a̲t̲i̲o̲n̲ ̲C̲o̲n̲t̲r̲o̲l̲ ̲F̲u̲n̲c̲t̲i̲o̲n̲
- Start-up of processes
- Create devices
- Disk
- VDU
- LTU
4̲ ̲ ̲S̲O̲F̲T̲W̲A̲R̲E̲ ̲S̲T̲R̲U̲C̲T̲U̲R̲E̲
The functional requirements outlined in chapter 3 are
allocated onto:
- processes and
- CAMPS system software
- DAMOS system software
as defined in figure 4.1 overleaf.
The
- IOC (Input Output Control System): CAMPS
- IOS (Input Output System): DAMOS
- FMS (File Management System): DAMOS
- MMS (Message Management System): DAMOS
- TMS (Terminal Management System): DAMOS
- OCH (Operator Console Handler): DAMOS
software is on the shelf.
4.1 D̲u̲a̲l̲i̲z̲e̲d̲ ̲C̲R̲8̲0̲ ̲C̲u̲s̲t̲o̲m̲ ̲M̲a̲d̲e̲ ̲o̲r̲ ̲M̲o̲d̲i̲f̲i̲e̲d̲ ̲C̲A̲M̲P̲S̲ ̲S̲o̲f̲t̲w̲a̲r̲e̲
4.1.1 O̲p̲e̲r̲a̲t̲i̲n̲g̲ ̲S̲y̲s̲t̲e̲m̲
The operating system to be used contains no new functions
compared to the CAMPS operating system, but a major
reorganization has to be done. LTU switchover is currently
not supported.
tegning
…86…1 …02… …02… …02… …02…
4.1.2 A̲D̲C̲C̲P̲ ̲T̲r̲a̲n̲s̲p̲o̲r̲t̲ ̲P̲r̲o̲c̲e̲s̲s̲
The CAMPS transport process to SCARS/CCIS interfaces
to an X25 level 2 protocol. This transport process
can be used with minor modifications (queue addressing
and check pointing).
4.1.3 L̲T̲U̲/̲L̲T̲U̲ ̲H̲a̲n̲d̲l̲e̲r̲ ̲w̲i̲t̲h̲ ̲A̲D̲C̲C̲P̲ ̲P̲r̲o̲t̲o̲c̲o̲l̲
The CAMPS SCARS/CCIS protocol can be used with options
2 and 8 included.
4.1.4 E̲t̲h̲e̲r̲n̲e̲t̲ ̲T̲r̲a̲n̲s̲p̲o̲r̲t̲ ̲P̲r̲o̲c̲e̲s̲s̲
This process is new. A single blocked protocol without
retransmission to a TTY line with DTE in both ends
(enables flow control and detects presence of the receiver)
is suggested.
4.1.5 E̲t̲h̲e̲r̲n̲e̲t̲ ̲G̲a̲t̲e̲w̲a̲y̲ ̲L̲T̲U̲ ̲a̲n̲d̲ ̲L̲T̲U̲ ̲H̲a̲n̲d̲l̲e̲r̲
A standard LTU interfacing to a V24 TTY line can be
used.
4.1.6 W̲a̲t̲c̲h̲d̲o̲g̲ ̲F̲i̲r̲m̲w̲a̲r̲e̲
Contain a subset of the CAMPS firmware, except that
- LTU monitoring
- LTU switching
is not supported.
4.2 R̲E̲M̲O̲T̲E̲ ̲C̲R̲8̲0̲ ̲C̲U̲S̲T̲O̲M̲ ̲M̲A̲D̲E̲ ̲O̲R̲ ̲M̲O̲D̲I̲F̲I̲E̲D̲ ̲C̲A̲M̲P̲S̲ ̲S̲O̲F̲T̲W̲A̲R̲E̲
4.2.1 O̲p̲e̲r̲a̲t̲i̲n̲g̲ ̲S̲y̲s̲t̲e̲m̲
The CAMPS operating system can with a major reorganization
be used.
4.2.2 A̲D̲C̲C̲P̲ ̲T̲r̲a̲n̲s̲p̲o̲r̲t̲ ̲P̲r̲o̲c̲e̲s̲s̲
The CAMPS transport process to SCARS/CCIS with modification
concerning
- detection of message type
- distribution to file or VDU
- sending of completion log
- queue addressing
can be used.
4.2.3 L̲T̲U̲ ̲w̲i̲t̲h̲ ̲A̲D̲C̲C̲P̲ ̲P̲r̲o̲t̲o̲c̲o̲l̲
Refer 4.1.3.
4.2.4 V̲D̲U̲ ̲S̲e̲r̲v̲i̲c̲e̲ ̲P̲r̲o̲c̲e̲s̲s̲
New process.
4.2.5 L̲T̲U̲ ̲w̲i̲t̲h̲ ̲T̲T̲Y̲ ̲I̲n̲t̲e̲r̲f̲a̲c̲e̲
Refer 4.1.5.
