A bit OT, but... David (and maybe others), what is your general view of the new "4-figure" 16F ("Enhanced Midrange") PICs ? The specific feature below (auto interrupt shadow regs) seems to be a big time/cycle saver for fast ISR routines. Jan-Erik. On 2010-11-29 15:29, Olin Lathrop wrote: > David Duffy (AVD) wrote: >> I'm not saving / restoring them in the ISR, as I understand this >> particular chip does that by itself. > > I haven't used one of the enhanced PIC 16 yet. I just checked, and both > FSRs are automatically saved/restored by the interrupt hardware, so that'= s > apparently not the issue. > > > ******************************************************************** > Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products > (978) 742-9014. Gold level PIC consultants since 2000. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .