[sdiy] dsPIC fun board

[Eric Brombaugh]

Tim Ressel wrote:
> I was noticing, however, the dsPic33 series can only address 64K of data memory. That is a little restrictive, especially at high sample rates. Now I'm not knocking Csaba's efforts. I'd line up for one or two of those boards. But some of the things I have planned need a bit more memory.

And in addition to that restriction, I'm not aware of any dsPICs 
currently in production that have more than 32k of on-chip SRAM. 
Directly addressable off-chip memory is not supported, but indirectly 
addressed memory is always a possibility though. Several projects have 
been done using the GPIO ports to read/write a large external SRAM. This 
is slower of course, but for many audio applications it's still plenty fast.

Eric