lindsay@MATHOM.GANDALF.CS.CMU.EDU (Donald Lindsay) (08/25/90)
In article <2450@crdos1.crd.ge.COM> davidsen@crdos1.crd.ge.com (bill davidsen) writes: [referring to a long-ago bug in the 8088 interrupt logic] > Was this problem only with NMI? I've run a lot of interrupts into an >original XT and never seen a problem. It was only the NMI, and since many boards didn't use NMI, the bug escaped into the field. Intel fixed the chip before the XT came out. The reason I brought this up, was to illustrate a moral: features that aren't used, very possibly won't work and never did. Much like Saltzer's Law: if a system is reliable enough, then the outage procedures don't work any more. -- Don D.C.Lindsay