PC COM INSTALLATION

The PCCOM.SYS is used to install device drivers for serial communication port. User may specifies I/O port address, baud rate, interrupt vector...etc. for different hardware configuration. To setup PCCOM complete the following steps:

STEP 1: Insert your serial communication adapter and

Connect communication cable.

STEP 2: Start the computer.

STEP 3: Use PCCOM.SYS program to install device

Driver and setup different communication protocol.

You must insert PCCOM.SYS commands to the CONFIG.SYS file, which will install device driver automatically when computer is booted.

3.1 Device Driver Installation

The PCCOM.SYS program is used to install device driver. To install PCCOM device driver, please write the following command format into CONFIG.SYS file.

DEVICE = PCCOM.SYS @filename

@ - Prefix symbol to specify configuration file.

Filename - Configuration file, which is used to specify hardware configuration of the system.

EXAMPLE 3.1.1

DEVICE = PCCOM.SYS @c:\pccom.opt

Set up device driver, which is specified by c:\pccom.opt file.

3.2 Hardware Configuration Specification

To specify hardware configuration, you must follow the PCCOM set up syntax. In this section, we only introduce how to write the hardware configuration file, more details syntax specification please see the APPENDIX C. In the hardware configuration file, three directives must be used.

/B:portno /D:devicename /A:setup

/B:portno

Specify the first port number.

/D:devicename

Specify the first device name.

/A:setup

Set up communication parameters and hardware configuration for ISA series cards.

/P: setup

For ISA series cards.

/P: setup

Set up communication parameters and hardware configuration for PCI series cards.

The syntax is:

/P: [card ID: PortNo: Port]

Most important thing is to describe /A: directive for ISA series cards and the /P: directive for PCI series cards. Now let’s introduce in the following. In order to familiar how to set up, we give some examples first.

EXAMPLE 3.2.1

Suppose we install one 4 port card, its port no. is defined from 4, its device name is defined from COM5. Hardware configuration is specified as:

Port no. = 4, 5, 6, 7

Device name = COM5, COM6, COM7, COM8

Interrupt request = 5

Port address = 2A0, 2A8, 2B0, 2B8

Interrupt vector = 2BF

Interrupt vector action = Active LOW

EXAMPLE 3.2.2

Suppose we install one 8 port card, hardware configuration is specified as:

Port no. = 0, 1, 2, 3, 4, 5, 6, 7

Device name = COM5, COM10, COM11, COM12

COM13, COM14, COM15, COM16

Interrupt request = 5

Port address = 280, 288, 290, 298,

2A0, 2A8, 2B0, 2B8

Interrupt vector = 2C2

Interrupt vector action = Active LOW

port no.

4

5

6

7

port address

2A0

2A8

2B0

2B8

ring buffer

2K

2k

2k

2k

baud rate

4800

4800

4800

4800

parity

none

none

none

none

data bit

8

8

8

8

parity bit

1

1

1

1

modem control

DTR

RTS

DTR

RTS

DTR RTS

DTR

RTS

flow control

XON

XON

XON

XON

EXAMPLE 3.2.3

Suppose we install 16 ports, hardware configuration is specified as

Port no. = 8, 9, 10, 11, 12, 13, 14, 15,

16, 17, 18, 19, 20, 21, 22,

23

Device name = COM1, COM3, AAA2, AAA3,

AAA4, AAA5, AAA6, AAA7,

AAA8, AAA9, AAA10, AAA11,

AAA12, AAA13, AAA14, AAA15

Interrupt request = 15

Port address = 280, 288, 290, 298,

2A0, 2A8, 2B0, 2B8,

180, 188, 190, 198,

1A0, 1A8, 1B0, 1B8,

Interrupt vector = 2C2, 1C2

Interrupt vector action = Active LOW

EXAMPLE 3.2.4

Suppose we install 16 ports, hardware configuration is specified as

Port no. = 8, 9, 10, 11, 12, 13, 14, 15,

16, 17, 18, 19, 20, 21, 22, 23

Device name = COM1, COM3, AAA2, AAA3,

AAA4, AAA5, AAA6, AAA7,

AAA8, AAA9, AAA10, AAA11,

AAA12, AAA13, AAA14, AAA15

Interrupt request = 5,7

Port address = 280, 288, 290, 298,

2A0, 2A8, 2B0, 2B8,

180, 188, 190, 198,

1A0, 1A8, 1B0, 1B8,

Interrupt vector = 2C2, 1C2

Interrupt vector action = Active LOW

Port 8 to port 15 are set to 1K bytes buffer, baud rate is 1200, non parity, 8 data bits, 1 stop bit, modem control flow are DTR+RTS, flow control is XON, and its port address start from 280 to 2B8, interrupt is 5, interrupt vector is 2C2, which was active low.

Port 16 to port 23 are set to 1K bytes buffer, baud rate is 1200, non parity, 8 data bits, 1 stop bit, modem control flow are DTR+RTS, flow control is XON, and its port address start from 180 to 1B8, interrupt is 7, interrupt vector is 1C2, which was active low.

EXAMPLE 3.2.6.

Install a single 4 Port PCCOM PCI card.

EXAMPLE 3.2.7

Install a 2 Port PCCOM PCI card with card ID of 1 and a 8 Port PCCOM PCI card with card ID of 2.

3.3 Some Constraints

In the hardware configuration file, each set owns one interrupt, which is enclosed by [] block, and each set controls either 1

port, 2 ports, 4 ports, 8 ports, 16 ports, or 24 ports, which is enclosed by ( ) block. Up to 8 sets can be set in one computer system, and total support up to 64 serial ports. In the following, we describe some constrains when set up communication parameters.

device name

Begin with a letter and must consist only letters and digits. Its length can not more than 8.

interrupt

Interrupt will be one of 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15.

interrupt vector

Interrupt vector will be any legal address or set to 0 means need not interrupt vector.

interrupt activation

Using HI or LO to set up active high or active low. If interrupt vector not be used, this filed is ignore.

buffer size

The maximum size for one port is 32KB, and one set can not be allocated more than 64KB. However, the size of total buffer used in driver can be larger than 64 KB.

baud rate

Baud rate can be any valid value in serial communication protocol.

parity

Either E, O, N can be selected which means even, odd, none parity.

data bit

Either 5, 6, 7, 8 data bits can be selected.

stop bit

Either 1 or 2 bits can be selected.

modem control

You can choice communication protocol you need. Multiple protocols are allowed to set in on port. DTR (Data Terminal Ready), RTS (Request To Send), OUT1, and OUT2 can be selected. If you ignore this field, it means you need not modem control.

flow control

Multiple protocol are allowed. It supports hardware handshaking which are DTR and RTS, and software handshaking XON. If you ignore this field, it means you need not flow control.

#

Begin in column one to specify as comments.

More detail syntax specification was specified in appendix C and communication parameters were introduced in appendix B.

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