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Across the Boards

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Communications Device Drivers

Section 6 - MAINCON Driver Configuration

Page 242

cfSOFTWARE Confidential,

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2000

6.14 MAINCON Panel D1, COMM Port Assignment (continued)

4. Type ‘I’ (INT 14)

This identifies the serial device as a INT 14 compatible async or modem server. Serial

Across the Boards

device drivers (CFXPROI, CFXDECI and CFXTYMI) will use the INT 14h API provided by the INT 14

redirector.

Programming note

: The basic dialect of the INT 14 interface is identical to the IBM PC BIOS INT

14h serial port services. The

Across the Boards

device drivers can actually make use of the BIOS INT

14h services - however data loss is almost guarenteed as the BIOS INT 14h interface is not interrupt

driven and is completely unbuffered. The following fields are required for a Type ‘I’ record:

4.1. COMM Port Number

The serial port to use (1 to 15). This must match the configuration of the INT 14 redirector.

INT 14 Dialect Multiple dialects of the INT 14 API exist.

Across the Boards

/DOS currently supports

two. The basic dialect (‘0’) and the the Modem Assist Extended dialect (‘1’). These dialects are

described below:

Basic Dialect (‘0’)

- Uses only BIOS INT 14h services

- Supports only 300, 1200, 2400, 4800 and 9600bps

- Does not support the MODEM-ON, MODEM-OFF, LINEBREAK or LINEDROP

functions

Modem Assist Extended Dialect (‘1’)

- Supports all the functions of the Basic Dialect

- Adds support for 19,200bps

- Adds support for the MODEM-ON, MODEM-OFF, LINEBREAK and LINEDROP

functions

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Eicon Networks CX1 Spezifikationen Seite 92