PIC power?

[Ingo Debus]

The Old Crow wrote:
> A delay line with 1ms accuracy to, say, 512ms would need to
> block move 512 bytes in a RAM device in under 1ms, but as a 20MHz PIC
> executes 200ns instructions, this is not a problem.

I don't understand a word #-). Why 512 bytes in 1ms?

Why do you need block moves at all for a delay? Can't you use a circular buffer
with moving read and write pointers?

Ingo