Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!b-tech!zeeff
From: zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff)
Newsgroups: comp.unix.microport
Subject: Re: Using AST 4port or clone on uPort (long)
Keywords: AST 4port ttypatch technical electronics
Message-ID: <9360@b-tech.ann-arbor.mi.us>
Date: 18 May 89 13:31:53 GMT
References: <701@tukki.jyu.fi> <705@tukki.jyu.fi> <104933@sun.Eng.Sun.COM> <124@unifax.UUCP>
Reply-To: zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff)
Organization: Branch Technology Ann Arbor, MI
Lines: 14

>
>On the other hand if the manufacture takes care he can allow you to have
>multiple cards on one IRQ. For example the Bell Tech Hub 6 allows up to four

While this is nice to have, I've found that the AT bus usually has 
enough extra interrupts to make sharing unnecessary.  Look into 
running a wire wrap wire from your serial card over to a 16 bit cards 
interrupt lines (perhaps int 10 and 15).  Then use software that 
allows you to use any free interrupt for the asy ports (like Jim Murray 
posted).  

-- 
  Jon Zeeff			zeeff@b-tech.ann-arbor.mi.us
  Ann Arbor, MI			sharkey!b-tech!zeeff