Dario Greggio wrote: > Apptech wrote: > >>> ... but I certainly can't remember the last time I've seen >>> a CPU >>> halt. >> >> MC6800 had it's own instruction for this >> >> $DD HCF 'Halt & Catch Fire' >> > > Hmmm, Z80 did have it :) > Nope, 6800, 6502, & the 6809 had a HCF. See: http://en.wikipedia.org/wiki/Halt_and_Catch_Fire While authoritative it does match what I remember. -- Linux Home Automation Neil Cherry ncherry@linuxha.com http://www.linuxha.com/ Main site http://linuxha.blogspot.com/ My HA Blog Author of: Linux Smart Homes For Dummies -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist