RW>-> -> Did you ever think of disabling the serial port using IRQ 3 in
RW>-> -> the  BIOS and let SIO handle the port? 
RW> 
RW>-> How can SIO handle the port without an IRQ? Use polling? I don't
RW>-> think  SIO will do that. 
RW>  
RW>It will; however, IIRC only if native OS/2 comm apps are using the 
RW>port.  Otherwise, you have to assign IRQs for DOS and Win64 comm
RW>apps. 


Here's my SIO config for using with PCBoard:

device=c:\sio\sio.sys [5,INTERNET:1F8,NONE:7] [6,INTERNET:1E8,NONE:7] 
[7,INTERNET:100,NONE:7] [8,INTERNET:108,NONE:7]

I don't use the first 4 comm ports and IRQ 7 is shared.


Jeff

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