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AIOCOMX.TXT
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1996-05-15
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NOVELL TECHNICAL INFORMATION DOCUMENT
TITLE: AIOCOMX V.2.11
DOCUMENT ID: TID250188
DOCUMENT REVISION: B
DATE: 27JUN94
ALERT STATUS: Yellow
INFORMATION TYPE: Symptom Solution
README FOR: COMX.EXE
NOVELL PRODUCT and VERSION:
NetWare Global MHS 2.0
ABSTRACT:
A stand alone release of AIO.NLM and AIOCOMX.NLM, for Global MHS users.
──────────────────────────────────────────────────────────────────────────────
DISCLAIMER
THE ORIGIN OF THIS INFORMATION MAY BE INTERNAL OR EXTERNAL TO NOVELL. NOVELL
MAKES EVERY EFFORT WITHIN ITS MEANS TO VERIFY THIS INFORMATION. HOWEVER, THE
INFORMATION PROVIDED IN THIS DOCUMENT IS FOR YOUR INFORMATION ONLY. NOVELL
MAKES NO EXPLICIT OR IMPLIED CLAIMS TO THE VALIDITY OF THIS INFORMATION.
──────────────────────────────────────────────────────────────────────────────
SYMPTOM
COMX.EXE provides AIOCOMX.NLM and AIO.NLM for Novell asynch products.
SOLUTION
Use the files in COMX.EXE according to the instructions below.
1. AIO requires that the comm ports be numbered starting from zero and that
they have contiguous numbers. Therefore include a "node=" parameter on the
command line.
For example:
LOAD AIOCOMX PORT=3F8 INT=4 NODE=0 NAME=COM1
sets the board number for this invocation of the driver to zero. Succeeding
load commands for the driver require "node=1", "node=2" ...
2. AIOCOMX determines whether or not the port has a 16550 UART. If a 16550
UART is detected, the maximum port speed defaults to 19.2kbps. If a 16550
UART is not detected the maximum port speed defaults to 2400bps. However,
some devices (including many internal modems) are capable of properly
supporting a higher speed than the default values.
If you have a buffered device capable of supporting speeds higher than the
default rate, use the following load command where N is the maximum speed
rating override:
For example:
LOAD AIOCOMX MAXRATE=14400 PORT=3F8 INT=4 NODE=0 NAME=BOARD0
would set an internal modem at comm1 to 14.4.
NOTE!! In theory, very high speeds can be set.
However, it is important the MAXRATE command not be abused.
A. The practical safe speed is determined by the buffering ability of the
communications device.
B. Even with extremely capable devices, speeds above 38400 are likely to
result in lost characters.
C. The CPU of a busy file server will be stressed, if it has to drive a comm
port at very high speeds.
3. Other available AIOCOMX load parameters are:
- PORT=N
Where N is the hexadecimal port address which the device resides.
- INT=N
Where N is the interrupt number assigned to the particular port.
- NAME=Y
Where Y is the user defined name which correlated to the board loaded.
- NODE=N
Where N is the decimal number which will override the hardware defined board
number. Ordinarily COM1 is assigned board 0, and COM2 is assigned board 1.
- FORCE
FORCE overrides hardware device validation, resulting in the driver using the
specified hardware resources regardless of whether they exist.
- NOFIFO
NOFIFO will override the automatic selection of 16550 FIFO mode. Regardless of
whether 16500 FIFO mode capability has been detected.
- RXT=N
Where N is the default override value to use for the transmitter data queue,
when 16550 FIFO mode has been selected.
- TXQ=N
Where N is the default override value to use for transmitter data queue, when
16550 FIFO mode has been selected.
Self-Extracting File Name: COMX.EXE
Files Included Size Date
COMX.TXT ( This File )
AIO.NLM 83033 5-4-94
AIOCOMX.NLM 17537 6-1-94
Installation Instructions:
Copy AIO.NLM and AIOCOMX.NLM to the SYSTEM subdirectory of the SYS Volume.
Patch History:
This release of AIO.NLM and AIOCOMX.NLM is supersedes all prior versions for
Global MHS.
NOTE: These files also work with NetWare Connect 1.0. However, NetWare
Connect administrators should download the latest specific NetWare Connect
patch.
Performance Issues:
1. AIOCOMX automatically configures itself to run in enhanced (FIFO) mode if
it detects a 16550 UART. The receiver data threshold and transmit queues for
the FIFOs can be changed by the user if this mode is allowed, but their
default values are probably optimal. If a 16550 device is not present in your
system the user is prohibited from attempting to place the driver in enhanced
mode.
2. Only ONE port is loaded for each installation of the driver.
3. Operates in both NetWare 3.x and 4.x environments.
4. Multiple command line options available at driver load time.
5. Driver command line load information is available by entering 'LOAD AIOCOMX
?' at server prompt. (The driver will not be loaded.)
6. Allows AIO applications to use the built in serial ports on the server or
those of an add in card that emulates standard serial ports. Up to four such
ports can be supported. Each port requires it's own interrupt.