Console


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Charon-AXP


Console

Table of Contents

General Description

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

Example for OPA0 console ("COM1" port):

set COM1 alias=OPA0

When using the TTA0 console ("COM2" port):

set COM2 alias=TTA0

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

CHARON emulated console supports only 80 symbols in one line.

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:

set COM2 alias=TTA0

communication

Parameter

communication

Type

Text string

Value

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

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

baud

Parameter

baud

Type

Numeric

Value

Forces the baud rate of the corresponding COM port to be a specified value.

The variety of supported values depends on the underlying physical communication resource (COM port). The most widely used values are: 300, 1200, 9600, 19200, 38400.

Example:

set OPA0 baud=38400

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:

set OPA0 break_on="Ctrl-P"

The default value is "Break".

This parameter can be specified only for COM1 (OPA0) console



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