[Coco] WiFi modem.

[RETRO Innovations]

On 1/20/2018 3:58 PM, Dave Philipsen wrote:
> I think an FPGA implementation of a 6551 would be a fairly easy thing and would not require a huge FPGA. I have a few projects where the synthesis of a nice 6850-compatible UART with a 16 byte receive buffer requires less than 350 LEs including the baud rate generator.  I have used it with data rates up to 1Mbps and it works great. You could even design a UART that could switch between being a 6850 and a 6551 with the flip of a switch. Other options could perhaps be added that would allow larger receive/transmit buffers, non-standard bit rates, etc, etc.
If you're game, I'd love to collaborate on something like this.  The 
Verilog and such is straightforward, but I'm stuck with how to implement 
field updates.  I have some small uCs to use, but I've never connected 
an FPGA to a uC for re-programming.

Jim