Ross Ridge <rrid...lub.uwaterloo.ca> wrote: >Unfortunately from your other posts you do seem to be working on >a single byte a time, so my technique probably won't be efficient.
Its a bit more - the hardware allows for 64 lines in and 64 lines out. >You probably want just want to be using constants and bit masking. >Something like: 8< ------------- standard and and or examples ---------------- This is approximately how I was doing it before I started the thread, but I was unsatisfied, and started looking for a way to directly address the bits, more as a further exploration of Python. >Bit twiddling like this is pretty basic. Yes it is, and in what we do it is also pervasive, and I miss my 8051/8031 assembler instructions where I can do an atomic "jump if bit set then clear' on a named bit in the bit addressable space, as well as a direct set or clear of a named bit, without resorting to anding and oring of bytes. Now I know that I can never do the jump in python, but I had hoped that I could get close to the direct set and clear, and the thread has been useful in that it has rubbed my nose into a lot of corners where I would otherwise never have gone. (like the gmpy stuff, for instance, and mucking around with bitfield-like classes, and the binascii stuff.) And I now _almost_ have my direct bit addressability... However - Python has failed to show me "the one and only one obvious way". *grins and ducks* Thanks to all who responded. - Hendrik -- http://mail.python.org/mailman/listinfo/python-list
