[sdiy] Place to start with 3E dev kit

[Eric Brombaugh]

Rainer Buchty wrote:
> Have a look into the reSID sources, e.g. to be found in VICE:
> 	http://www.viceteam.org/
>
> You'll even find some schematics about the (possible) innards of the SID 
> filter. Plus, of course, plenty of C++ code.
>   

That looks like enough detail to do a decent emulation in digital 
hardware. The main thing then is how well they've modeled it.

> The Syntiac VHDL sources are developed further to become a full-blown 
> C64 core for the C-One reconfigurable computer:
> 	http://c64upgra.de/c-one/
>
> or, more specifically,
> 	http://c64upgra.de/c-one/download/fpga64_alpha4_src.zip
>   

I grabbed that source too. They don't model the SID in that one - they 
have an off-chip interface to talk to a real SID.

> Alas, that one is Altera-based, so tuning it to Xilinx might involve 
> some work.
>   
Shouldn't be more than redefining the I/O. The VHDL looks pretty generic 
- not a lot of instantiated vendor-specific functions. But without a SID 
model it's not particularly useful. Be better off starting from scratch 
from reSID. Converting C/C++ to HDL isn't too tough.

Eric