Path: utzoo!attcan!uunet!zephyr.ens.tek.com!tekgen!tekigm2!timothym
From: timothym@tekigm2.MEN.TEK.COM (Timothy D Margeson)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Interupt conflicts
Keywords: PC Bus
Message-ID: <5832@tekigm2.MEN.TEK.COM>
Date: 17 Aug 89 15:57:30 GMT
References: <1875@uceng.UC.EDU> <[24ea313d:5029.1]comp.ibmpc;1@ddsw1.MCS.COM>
Reply-To: timothym@tekigm2.MEN.TEK.COM (Timothy D Margeson)
Organization: Tektronix, Inc., Vancouver,  WA.
Lines: 35

Hi,

Having read some of these discussions of how setting two add-in cards to the
same interrupt will cause damage.....


Have any of you ever seen electronics??? A TTL gate is designed to take
short circuits to ground indefinately (so long as the dissipation spec of the
chip is not exceeded).

Also, for your info, most PC's with four com ports share interrupts 3 & 4,
and somehow these never blow up!!!

Summary? Place two add-ins in the same interrupt, what do you get? 
	 Some software that won't work!

Any other responses about blowing the chips are wrong, and I don't care if
on your mothers PC you know of a case where they did 'cause what probably
really happened is some non-static knowledgable person got into the PC with
pliers or hands and started pulling this part or that part trying to fix the
problem he cause to the card he had just installed. Ask yourself this:

  The last time your worked on your computer, did you wear an anti-static
  wrist strap connected to your PC and anti-static desk top? 

  If you answered no, then you HAVE damaged your PC, perhaps not in a way
  that is immediately noticable, but the damage is real non the less (there
  are ways to minimze this damage using good handling techniques but one
  minor slip will take out many IC's).

-- 
Tim Margeson (206)253-5240
PO Box 3500  d/s C1-022                          @@   'Who said that?'  
Vancouver, WA. 98668
e-mail replies to: timothym@tekigm2.MEN.TEK.COM