Messages in this thread | | | Date | Fri, 25 Apr 2003 10:52:24 +0200 | From | Helge Hafting <> | Subject | Re: Flame Linus to a crisp! |
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John Bradford wrote:
> Could we not take this idea to it's logical extreme, and simply > calculate the results of every opcode, on every value, for every state > of all of the registers, and store them in an array of DIMMs, and > simply look up the necessary results? I.E. a cpu which is one _huge_ > look up table :-).
You can, if you can keep the internal state sufficiently small. Say we want to keep the internal state down to 32 bit, using a 16GB lookup table. (4G*32bit)
What would the state be? Perhaps one general-purpose 8-bit register, a 16-bit program counter and 8 bits left for the current opcode & flags.
Less opportunities than a 6502, but it'd sure be fast.
Helge Hafting
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