*BSD News Article 14351


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From: ngorelic@speclab.cr.usgs.gov.cr.usgs.gov (Noel S. Gorelick)
Subject: Re: patch support for Chris' com drivers ?
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Date: Mon, 12 Apr 1993 08:55:42 GMT
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Rodney Grimes (rgrimes@agora.rain.com) wrote:
>
>Chris, please don't contridict me, you have not even seen my GENERICISA
>config file.  Yes the support for COM3 and COM4 is there, no they do not
>use shared interrupts.  I used the most common alternate IRQ's for them
>IRQ2 and IRQ5, this has the largest hardware support.  I am running a kernel
>config just that way.  I have 2 16550 ports at std com2 and com4, irq5, irq2
>respectfully.  And 2 16450 ports at std com1 and com3.  It works and it has
>since 0.1.

Umm, what about those of us that can't spare irq2 and/or irq5?  Are there
shared interrupt drivers available?  Heres what I currently have:  

IRQ 1:  pc0 (keyboard)
IRQ 3:  com2
IRQ 4:  com1
IRQ 5:  wt0 (tape drive)
IRQ 6:  fd0 (floppy drive)
IRQ 10: we0 (ethernet card)
IRQ 11: as0 (scsi controller)
IRQ 13: npx (what the heck is this?)
IRQ 14: wd0 (Do I even NEED this if I have a scsi drive only?)

That leaves 2,7,8,9 and 12 free.  Anything specific have to go in 7,8,9 or 12?

(I know neither my tape controller nor my ethernet card will go at anything
above 10, leaving actually only 4 free slots, so... I COULD do it without
shared interrupts, given that my com cards will let me put them at 2 and 5)

Sorry if these are stupid questions...  I'm a software guy. this hardware
stuff is new to me.

--
"You want it should sing too?"   | /*  Yeah we got dogs and Valvoline
  ngorelic@speclab.cr.usgs.gov   |     Its a pretty damn good time.    */
"Life is pain. Anyone that tells you different is trying to sell you something"