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Old 05-23-2009, 09:18 PM   #1372 (permalink)
needs more cowbell
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Here is the CPU and Crystal that come with the mpguino. It is pin compatible but some of the instructions/register names are a bit different than the mega8. I'm moving towards 20mhz too FYI, couple low level timing changes as you can imagine.

I don't think it will solve slow 32 bit math though, 32 bit math is handy, but slow, have to use it sparingly. I do a lot of it but only once every 1/2 second to update the display and just do basic addition in the interrupts.

$4.11 atmega168p

$0.57 20mhz small crystal

edit: did not see a divide assembler instruction for either the mega8 or 168. Both muls take 2 cycles

Last edited by dcb; 05-23-2009 at 09:43 PM..
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