Theo v. Werkhoven wrote: > Sat, 20 Jan 2007, by [EMAIL PROTECTED]: > >> That's not direct access to a bit, IMO. Direct access would be an >> operation that would load into a register a certain bit, or another that >> would compare directly to a certain bit in a byte in memory (in one op). I >> have never seen it, though. >> > > That would be rather inefficient opcodes I think, and I can't think > of any circumstance where that would be neccesary. Perhaps that's > why you don't see it. > > Theo > IIRC, bit manipulation was one of the advantages of the Zilog Z80 over the Intel 8080 & 8085. Of course, that's over 30 years ago now.
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