Moxa Technologies C104P User manual

C104P and C168P
Universal 4/8 Port
Serial Boards
Standard multiport
serial boards family with
state-of-the-art ASIC technology
Feb. 1998 (6th edition)
All Rights Reserved

Copyright Notice
This documentation is copyrighted by Moxa Technologies Co., Ltd. All
rights are reserved. Moxa Technologies reserves the right to make
improvements to the products described in this manual at any time without
notice.
Information provided in this manual is intended to be accurate and reliable.
However, Moxa Technologies assumes no responsibility for its use, nor for
any infringements of rights of the fourth parties which may result from its
use.
MOXA is a registered trademark of Moxa Technologies Co. Ltd. The other
trademarks in this manual belong to their manufacturers individually.
Moxa Technologies Co., Ltd. Moxa Tech USA (CA)
Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]
www.moxa.com.tw support @moxa.com.tw

M
o
x
a
I
n
t
e
r
n
e
t
S
e
r
v
i
c
e
s
Customer’s satisfaction is always our number one concern. To ensure
customers get the full benefit of our services, Moxa Internet Services (MIS)
have been built for technical support, product inquiry, new driver upgrade,
etc.
The followings are the services we provide.
E-mail for technical support
address: [email protected]
Ftp site for free driver upgrade
address: ftp.moxa.com or ftp.moxa.com.tw
user ID: ftp
password: your_email_address
World Wide Web (WWW) for product info.

Table of Contents
Chapter 1 Introduction............................................................................. 1
1.1 Overview ...................................................................................................1
1.2 C104P .......................................................................................................3
1.3 C168P .......................................................................................................5
Chapter 2 Quick Installation ................................................................. 11
Chapter 3 Installation ............................................................................ 13
3.1 Hardware Configuration - Io-irq.exe ........................................................13
Chapter 4 For Windows NT Users .......................................................... 17
4.1 Software Installation................................................................................17
4.2 Board and Port Configuration..................................................................18
4.3 Board Initialization Status Checking........................................................19
4.4 Driver Upgrade/Removal.........................................................................20
4.5 MOXA Serial Comm Tool: PComm ..........................................................20
4.6 Troubleshooting.......................................................................................20
Chapter 5 For Windows 95 Users.......................................................... 23
5.1 Driver Installation - Setup95.exe .............................................................23
5.2 Board and Port Configuration..................................................................23
5.3 Board Initialization Status Checking........................................................25
5.4 Driver Upgrade/Removal.........................................................................25
5.5 MOXA Serial Comm Tool: PComm ..........................................................25
5.6 Troubleshooting.......................................................................................26
Chapter 6 PComm ..................................................................................... 29

6.1 Installation ...............................................................................................29
6.2 Programming Library...............................................................................29
6.3 Utilities.....................................................................................................30
Chapter 7 For DOS Users......................................................................... 31
7.1 Driver Installation, Setup, Loading and Unloading...................................31
7.2 MOXA Serial Port Naming Convention....................................................34
7.3 DOS API-232 Library and Programming .................................................34
7.4 Data Scope..............................................................................................35
Chapter 8 For Windows 3.x Users ......................................................... 37
Appendix A Troubleshooting ................................................................... 41
Appendix B C104P Pinouts and Cable Wiring ............................................... 45
B.1 RS-232 Cable Wiring ............................................................................... 45
B. 2 DB62 Connector Pinouts.......................................................................... 47
Appendix C C168P Pinouts and Cable Wiring ............................................... 49
C.1 RS-232 Cable Wiring ............................................................................... 49
C.2 RS-422 Cable Wiring ............................................................................... 51
C.3 RS-485 Cable Wiring ............................................................................... 52
C.4 RS-422/485 Impedance Matching............................................................ 55
C.5 DB62 Connector Pinouts.......................................................................... 56
Appendix D RS-485 Programming ........................................................... 57
Appendix E PC I/O Port Address Map ............................................................ 59

1
Chapter 1 Introduction
1.1 Overview
The Standard Multiport Async Solutions
The standard C104P/C168P multiport boards offer 4/8 serial ports for
connecting terminals, modems, printers, data acquisition equipment and any
other serial devices to the PC/AT/Pentium and its compatible systems.
The C104P/C168P is equipped with custom-designed ASIC chip which
replaces lots of conventional ICs and reduces the board to half-size. The whole
family supports 16 bit architecture. Full range of I/O addresses and IRQs are
available. In addition, with on-board EEPROM for storing the configuration
data, the family is designed without jumper or switch. These features make each
port on the board truly independent to any other port and thus compatible with
most existing multiport boards. The board is also available in PCI bus.
Please contact MOXA dealer/distributor or Web site for more details.
Hardware Configuration Method
C104P/C168P
JP1
Traditional
M ultipoort Board
Jumper
ON
1 2 3 4
Switch
.........
.........
New : set I/O address Traditional : set switch and
and IRQ via software and jumper manually for
Utility. I/O address and IRQ.
Instead of using traditional jumper or switch for IRQ and I/O address settings,

Introductio l l Chapter 1
2
hardware configuration of each port is easily set by DOS utility, Io-irq.exe,
which read and write the on-board EEPROM for configuration information
through the CAP (Configuration Access Port) address. The CAP address is
the only channel via which the configuration utility Io-irq.exe can access the
board, which is identical to the first port's base I/O address.
The only jumper, JP1, is designed in case that users forget the CAP address.
Normally JP1 is left open. When JP1 is short, the CAP address is forced to a
fixed I/O address, 0xA700. However, to adopt quick installation (described
later), it is a must to keep JP1 always short.
Quick Installation
To ease the hardware configuration, users who install only one C104P/C168P
board under Windows NT/95 are recommended to adopt quick installation
described in Chapter 2. Other users please see Chapter 3 for installation details.
Because the board is so flexible in hardware configuration that they are
compatible virtually with all kinds of other manufacturer's multiport boards
using 16450 or 16550 UART.
Operating System Support
C104P/C168P is operational under most popular operating systems such as
Windows 95, SCO UNIX/XENIX/OpenServer, DOS, Linux, QNX, FreeBSD,
PICK OS, IMS Multiuser DOS, etc. However, MOXA device drivers for
Windows NT, Windows 95, Linux, SCO UNIX/OpenServer, UNIX SVR4.2,
DOS and Windows 3.x are provided for better installation, configuration and
performance. In this manual, chapters for MOXA Windows NT,Windows 95,
UNIX,DOS and Windows 3.x device drivers are included. For other
compatible systems not mentioned, please refer to the respective operating
system’s manual for how to install and configure the standard driver.

Chapter 1 l l Introduction
3
MOXA Serial Comm Tool
For easy application development, MOXA provides an easy-to-use serial
communication library under Windows NT/95 (PComm) and Windows 3.x/DOS
(API-232). Users can use this library to produce your own applications using
Microsoft C, Turbo C, Assembly, QuickBASIC, Turbo Pascal, Clipper, Visual
Basic, Visual C++, Borland Delphi, etc. Utilities, such as diagnostic and
monitor, are included for diagnosing the board/port or monitoring the
communication status.
1.2 C104P
Features
vCustom-designed ASIC, compact board size (half-size)
vNo switch no jumper, easily configured by software
vIndependent I/O address, IRQ setting for each of 4 serial ports
v16 bit AT bus architecture, more IRQs supported
vWindows NT/95/3.x and DOS device drivers
Specifications
vBus interface :ISA (EISA compatible)
vNumber of ports : 4
vI/O address :0x0000 ~ 0xFFFF
vIRQ :2, 3, 4, 5, 7, 10, 11, 12, 15
vData bits :5, 6, 7, 8
vStop bits :1, 1.5, 2
vParity :none, even, odd, space, mark
vUART : 4¡Ñ16550
vSpeed :50 ~ 115.2K bps
vConnectors : 4¡ÑDB25 male (DTE)
vData signals :TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
vOperating temp. :0 ~ 55 ¢J
vPower requirement: 90mA max. (+5V), 55mA max. (+12V), 75mA max. (-12V)
vDimensions :15.7cm¡Ñ8.3cm

Introductio l l Chapter 1
4
Check List
Upon unpacking the C104P, you should find the following items in the package,
1. C104P 4 port serial board
2. This User's Manual
3. Windows NT/95 driver diskette¡Ñ1, DOS/Windows 3.x (API-232)
driver diskette¡Ñ1, PComm diskette¡Ñ1
4. 30 cm cable (DB37 to 4¡ÑDB25 male connectors)
C104P
P1 P2
P3 P4
System Support
The C104P is compatible with various operating systems such as Windows NT,
Windows 95, SCO UNIX/XENIX, OS/2, QNX and Linux. However, Moxa
supports proprietary drivers for better performance. See the driver list below.
C104P
Windows NT 3
Windows 95 3
Windows 3.x 3
DOS 3
Linux R
QNX C
SCO UNIX/OpenServer C
SCO XENIX C
PICK OS C
OS/2 C
MUMPS C
Multiuser DOS C
FreeBSD C