[Coco] Arduino DriveWire server

[Barry Nelson]

It can do it, I'm sure to, but only if you change the clock crystal or do raw bit level I/O. If you try to use it as is the baud rates at the higher speed are just ever so slightly off.

> RETRO Innovations go4retro at go4retro.com 
> Sat Jun 18 21:51:27 EDT 2016
> On 6/18/2016 6:53 AM, Barry Nelson wrote:
> >   I have inquired about this before and not gotten a response, so I am trying again. I understand that Boisy has ported DriveWire to an Arduino and got it to run but had issues with it running serially at standard baud rates above 57600. I would like to get a copy of the Arduino source code. My thought is if the Arduino won't do 115200 baud, maybe the code on the CoCo side could be adjusted to do a baud rate that the Arduino will do. Other possibilities include hooking the Arduino to an UART chip like a 16550 and have the 16550 generate the serial I/O since it has it's own timing. This could yield a small compact and inexpensive DriveWire server that could be easily used with a real CoCo or the CoCo 3 FPGA.
> >
> 
> I am confident the Arduino can do 115200 or even 230400, but only if you 
> roll your own AVR C routines for UART.
> 
> 
> Jim
> 
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