What about using a SCENIX chip instead? A SCENIX chip at 50 MHz has 5 times
the speed of a 20MHz PIC. Since this is just number crunching, no
peripherals are needed and there is no trade-off.

Sean

At 01:22 PM 8/23/99 +0300, you wrote:
>I've been toying with the idea of running that popular RC5 key search on a
>PIC. Now, I realize it probably won't be cost effective, because I have
>estimated the performance of it on a PIC - with $1 per a 20 MHz pic, I'd
spend
>more money on just the PICs than buying a complete K6-2 or Celeron system, to
>get equivalent performance.
>
>What really hurts the performance is the 32-bit data, and how to handle it.
>I've managed to do a 32-bit rotate (which can roll the data 0-31 bits left),
>which takes 17-47 instruction cycles (average 35.25), but haven't looked
>further into it. I'd be ecstatic if I managed to get above 5000 keys/second
>from a single PIC, but I have a feeling that it will be difficult if not even
>impossible.
>
|
| Sean Breheny
| Amateur Radio Callsign: KA3YXM
| Electrical Engineering Student
\--------------=----------------
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