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