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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