Table of Contents
General Description
CHARON-AXP offers a one- (OPA0) or two-port serial console, depending on the specified HP Alpha model.
The AlphaServer DS10, AlphaServer DS10L, AlphaServer DS15, AlphaServer 400, AlphaServer 800, AlphaServer 1000 and AlphaServer 1000A have an additional on-board serial line controller providing a serial line TTA0.
Example for OPA0 console ("COM1"):
set COM1 alias=OPA0 |
When using the TTA0 console ("COM2"):
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Refer to Mapping Serial line controllers to system resources for details of mapping.
General parameters
CHARON-AXP console lines COM1 and COM2 have the following parameters:
All the values in the following tables are case insensitive.
alias
Parameter | alias | |
---|---|---|
Type | Identifier | |
Value | This parameter is used to set an useful name for COM1 or COM2 ports. Usually it is "OPA0" for COM1 and "TTA0" for COM2 Example:
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communication
Parameter | communication |
---|---|
Type | Text string |
Value |
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baud
Parameter | baud | |
---|---|---|
Type | Numeric | |
Value | Forces the baud rate of the corresponding TTY port to a specified value.The variety of supported values depends on the underlying physical communication resource (TTY port). The most widely used values are: 300, 1200, 9600, 19200, 38400. Example:
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break_on
Parameter | break_on | ||
---|---|---|---|
Type | Text string | ||
Value | Specifies what byte sequences received over the physical serial line will trigger a HALT command. This parameter works only for the console line. Specify the following values: "Ctrl-P" , "Break" or "none" ("none" disables triggering a HALT condition). If your guest operating system is OpenVMS in addition to "none" setting you have to set a specific console parameter "controlp" to "off" in the following way:
The second line is to preserve the ROM settings. Example:
The default value is "Break". This parameter can be specified only for COM1 (OPA0) console |
stop_on
Parameter | stop_on | |
---|---|---|
Type | Text string | |
Value | Specifies what byte sequences received over the physical serial line will trigger a STOP condition. The STOP condition causes CHARON-AXP to exit. Specify either “F6” or “none” ("none" disables triggering a STOP condition). Example:
The default value is "none". Setting "F6" triggers the STOP condition upon receipt of the " This parameter can be specified only for COM1 (OPA0) console |
log
Parameter | log | ||
---|---|---|---|
Type | Text string | ||
Value | A string specifying a file name to store the content of the console sessions or a directory where the log files for each individual session will be stored. If an existing directory is specified, CHARON-AXP automatically enables creation of individual log files, one for each session using the same scheme as used for the generation of the rotating log files. If the "log" parameter is omitted, CHARON-AXP does not create a console log. Examples:
Only existing directory can be used as a value of the "log" parameter. |
log_file_size
Parameter | log_file_size | ||
---|---|---|---|
Type | Text string | ||
Value | If log rotation is enabled, the log_file_size parameter determines the log file size threshold at which the log is automatically rotated.
Examples:
Minimum log file size is 64K, maximum is 1G. Setting size less then 64K effectively makes the log file unlimited. |
host
Parameter | host | |
---|---|---|
Type | Text string | |
Value | A remote host’s IP address or hostname (and optionally a remote TCP/IP port number) for the virtual serial line connection. If omitted, the virtual serial line does not initiate a connection to the remote host and will listen for incoming connection requests. Specify the value in the following form:
If the "<port-no>" is not specified, the virtual serial line uses the TCP/IP port number specified by the "port" parameter (see below). |
port
Parameter | port |
---|---|
Type | Numeric |
Value | The TCP/IP port number for the virtual serial line. A virtual serial line always listens on this port for incoming connection requests. If multiple virtualized machines are running on a server, ensure the port number is unique across the platform. |
application
Parameter | application |
---|---|
Type | Text string |
Value | A command line for calling some application for communication to CHAARON on the given line. Example:
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Notes on "host", "port" and "application" parameters
Use the combination of "port", "host" and "application" parameters as follows to connect a 3rd party terminal emulator or similar program.
set COM1 alias=OPA0 port=10003 application="xterm -title OPA0 -e chterm -h 127.0.0.1:10003"
In this example CHARON-AXP OPA0 console connects to port 10003 of localhost ("
127.0.0.1
") and at the same time it starts "xterm" with parameters "-title OPA0 -e chterm -h 127.0.0.1:10003
", instructs it to connect to the port 10003 of the host with TCP/IP address "127.0.0.1
" (localhost)It is possible to specify a port on a remote host (note that CHARON always acts as a server). The syntax is:
set COM2 alias=TTA0 host="192.168.1.1:20000" port=10000
In this example CHARON-AXP accepts connection on local port 10000 and connects to remote port 20000 of a host with TCP/IP address "192.168.1.1"
Note: the examples above are mainly used for inter-CHARON communications. They are used to connect CHARON-AXP to an application that communicates to CHARON-AXP as described below.
Example of two CHARON systems connected to each other:
On host "A":
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On host "B":
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On these two hosts, executing CHARON-AXP, the two TTA0 lines connect to each other, thus creating a "serial" cable between the two emulated Alphas. The sequential order in which the instances of CHARON-AXP are started makes no difference.
Mapping Serial line controllers to system resources
line
Parameter | line | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Type | Text string | ||||||||||
Value | A defined TTY port on host system:
A specific account for running CHARON ("charon") does not allow usage of physical consoles " |
"ttyY" notation specifics
Note that the "ttyY
" notation can have different forms depending on the nature of the device used:
Mapping | Type | Commentary | ||
---|---|---|---|---|
"/dev/tty<N>" where N is from 0 to 11 | Linux virtual tty | Those tty devices must be free from the Linux "getty/mgetty" and similar programs (specified in "/etc/inittab") Example:
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"/dev/ttyS<N>" where N is a number | Onboard serial lines | Example:
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"/dev/tty<XXX>" where XXX is a complex letter/number notation | Proprietary (depending on a driver) devices | Example for a first port of a MOXA card:
Example for a first port of a DIGI card:
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"/dev/ttyUSB<N>" where N is a number | Modem or USB serial lines adapters | Example:
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