Re: Instr()

"dpb" <none@xxxxxxx> wrote in message news:f8vp3v$v19$1@xxxxxxxxxxx

Well, strictly speaking, "micro-code" is another level below
machine code (for hardware that supported it)...

Micro code is actually required when creating many modern processors (including most modern Intel and AMD processors as used in pcs), which are often designed so that they perform lots of individual actions in order to execute a single specific machine code instruction, enabling a single instruction to actually perform quite a lot of work. The opposite of this strategy was used in RISC (Reduced Instruction Set) processors, which I think Apple and some others favoured for a long time, and in which a single machine code instruction often equated to a single action in the processor. I've lost touch with hardware in the last twenty years or so, and things have probably changed a great deal since those "simple days", but that's the general position as I remember it.

Mike


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