about serial port extension

Hi, all

I have only 4 IRQs that could be used on my board ,but I need more than 6
serial ports. So, does anyone know how to add serial port with sharing the
IRQs? Should I rewrite the serial driver for the port with sharing IRQs?

But I heard that the drivers are the same, and just by adding one more new
key to the registry, everything would be settled. Is it true? How?

Thx

maverick

David
Tue Jun 01 13:14:17 CDT 2004

It all depends on system. If those 4 interrupts is sharable (which means it
is level trigger interrupt), you do not need rewrite serial driver. Only
task you need to do is create Installable ISR.
IF those interrupt is not sharable, you need modify existing serial driver
to handle multiple Serial Port.

"Maverick" <maverick@newsfan.net> wrote in message
news:uyFGDU4REHA.2404@TK2MSFTNGP09.phx.gbl...
> Hi, all
>
> I have only 4 IRQs that could be used on my board ,but I need more than 6
> serial ports. So, does anyone know how to add serial port with sharing the
> IRQs? Should I rewrite the serial driver for the port with sharing IRQs?
>
> But I heard that the drivers are the same, and just by adding one more new
> key to the registry, everything would be settled. Is it true? How?
>
> Thx
>
> maverick
>
>