>> >ever dream of using hc11 instruction set on pic17c4x? >> >> Try looking at the 68HC08 or 68HC12? They are much faster silicon than >> the 'HC11. > >I don't think switching from `HC11 mnemonics to `HC08 or `HC12 mnemonics >will make any execution speed difference when those mnemonics are being >emulated by macro substitution as PIC17C42 instructions, do you? reply...... Read between the lines......(I said silicon)..... The speed of the 'HC08/'HC12 is akin to the 17c4x. So, if you like the easy 'HC11 instruction set, why not switch to Moto?