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Table of Contents

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General Description

CHARON-AXP offers two-port serial console on all supported AXP models.

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Refer to Mapping Serial line controllers to system resources for details of mapping.

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General parameters

CHARON-AXP console lines COM1 and COM2 have the following parameters:

(info) All the values in the following tables are case insensitive.

alias

Parameteralias
TypeIdentifier
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:

set COM2 alias=TTA0


communication

Parametercommunication
Type

Text string

Value

  • "ascii" - for connection to terminals  (default)

  • "binary" - for binary (packet) protocols, which are used mainly for communicating with PLCs

baud

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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.

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Mapping Serial line controllers to system resources

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Parameterline
TypeText string
Value

A defined TTY port on host system:

SyntaxDescription
"/dev/tty<N>"Virtual serial lines
"/dev/ttyS<N>"Onboard serial lines
"/dev/ttyUSB<N>"Modem or USB serial lines adapters
"/dev/tty<XXX>"Proprietary (depending on a driver) devices such as DIGI or MOXA cards


Note

A specific account for running CHARON ("charon") does not allow usage of physical consoles "/dev/tty<N>" as CHARON consoles. If you plan to map CHARON console to "/dev/tty<N>" use only "root" account for CHARON running.

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"ttyY" notation specifics

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MappingTypeCommentary

"/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:

"/dev/tty1"


"/dev/ttyS<N>"

where N is a number

Onboard serial lines

Example:

"/dev/ttyS1"


"/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:

"/dev/ttyR01"

Example for a first port of a DIGI card:

"/dev/ttyaa"


"/dev/ttyUSB<N>"

where N is a number

Modem or USB serial lines adapters

Example:

"/dev/ttyUSB1"

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