How to setup irq and i/o for com1 to com8

[Guest]

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Dear all,

I want to add 7 serial com port to my computer, totally, there
will be 8 comport. As I am not familiarized with comport setting. so
please suggest the best setting for 8 serial com port. What is the
(maximum) legal range of i/o address that I can use. And what is the
(maximum)legal range of irq that I can use. Can I assign same irq
number to different com port? Or should I arrange a unique irq and i/o
address to the com port.

Please suggest your solution as follows:

i/o irq
com1
com2
com3
com4
com5
com6
com7
com8

Thanks for your help.

 

[Jerry]

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Don't know about 8 ports but the standard for four is:
Com 1 = 3F8h to 3FFh 4
Com 2 = 2F8h to 2FFh 3
Com 3 = 3E8h to 3EFh 4
Com 4 = 2E8h to 2EFh 3

"hon123456" <peterhon321@yahoo.com.hk> wrote in message
news:34387e87.0411252008.3b79baf8@posting.google.com...
> Dear all,
>
> I want to add 7 serial com port to my computer, totally, there
> will be 8 comport. As I am not familiarized with comport setting. so
> please suggest the best setting for 8 serial com port. What is the
> (maximum) legal range of i/o address that I can use. And what is the
> (maximum)legal range of irq that I can use. Can I assign same irq
> number to different com port? Or should I arrange a unique irq and i/o
> address to the com port.
>
> Please suggest your solution as follows:
>
> i/o irq
> com1
> com2
> com3
> com4
> com5
> com6
> com7
> com8
>
> Thanks for your help.

 

[Guest]

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Install the cards and let windows do the rest.

"hon123456" <peterhon321@yahoo.com.hk> wrote in message
news:34387e87.0411252008.3b79baf8@posting.google.com...
> Dear all,
>
> I want to add 7 serial com port to my computer, totally, there
> will be 8 comport. As I am not familiarized with comport setting. so
> please suggest the best setting for 8 serial com port. What is the
> (maximum) legal range of i/o address that I can use. And what is the
> (maximum)legal range of irq that I can use. Can I assign same irq
> number to different com port? Or should I arrange a unique irq and i/o
> address to the com port.
>
> Please suggest your solution as follows:
>
> i/o irq
> com1
> com2
> com3
> com4
> com5
> com6
> com7
> com8
>
> Thanks for your help.

 

[Guest]

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

On 25 Nov 2004 20:08:31 -0800, peterhon321@yahoo.com.hk
(hon123456) wrote:

>Dear all,
>
> I want to add 7 serial com port to my computer, totally, there
>will be 8 comport. As I am not familiarized with comport setting. so
>please suggest the best setting for 8 serial com port. What is the
>(maximum) legal range of i/o address that I can use. And what is the
>(maximum)legal range of irq that I can use. Can I assign same irq
>number to different com port? Or should I arrange a unique irq and i/o
>address to the com port.
>
>Please suggest your solution as follows:
>
> i/o irq
> com1
> com2
> com3
> com4
> com5
> com6
> com7
> com8
>
>Thanks for your help.

Unless you are using some old hardware, most current comport
adapters now use virtual comports which share irq 9 if they are
hardware adapters, and if they are USB based, they may not use an
irq. What does your your comport adapter maker say?

 

[Guest]

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Do not buy three extra 2 port COM port card. Buy a special intelligent
multi-serial port adapter. These type of card have a special "processor" to
handle the extra ports and may only use 1 IRQ/DMA channel.

Check with one such manaufacturer:

www.digi.com


"hon123456" <peterhon321@yahoo.com.hk> wrote in message
news:34387e87.0411252008.3b79baf8@posting.google.com...
> Dear all,
>
> I want to add 7 serial com port to my computer, totally, there
> will be 8 comport. As I am not familiarized with comport setting. so
> please suggest the best setting for 8 serial com port. What is the
> (maximum) legal range of i/o address that I can use. And what is the
> (maximum)legal range of irq that I can use. Can I assign same irq
> number to different com port? Or should I arrange a unique irq and i/o
> address to the com port.
>
> Please suggest your solution as follows:
>
> i/o irq
> com1
> com2
> com3
> com4
> com5
> com6
> com7
> com8
>
> Thanks for your help.