Jim Nitchals wrote:
>
> >
> > I've been trying to figure out whether
> > I could make a 2600 emulator for my
> > 64 - mind you, this isn't a stock 64.
> > It's got a board called a SuperCPU,
> > a 20Mhz 65816 that emulates a 6502
>
> A 6502/816 doing single-step by placing instructions into a temporary
> holding area then executing them can run at about 7% of real-time. If
> doing address computation, masking of the 2600's high order address
> bits, etc you'd be lucky to get to 2% of realtime (times 20 for your
> fast '816, for a total of 40% of the speed of a real 2600.)
Well, you also have to consider that an 816 is much faster than a 6502
at a given
speed, or does it emulate the cycle times in the compatibility mode?
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