6850 Serial Card with Clock for RC2014 or Minstrel 4th PCB

This is the PCB to build an RC2014 card with an 6850 or 68B50 serial port. It also includes a clock for the serial chip which allows this to run at a separate frequency to the main bus clock.

This is ideal for use with the Minstrel 4th which has it's own 3.25MHz or 6MHz clock, and allows the UART to run at 7.3728MHz for more accurate baud rates. This clock can also be fed to the RC2014 bus to be used as the main clock if desired.

The serial port is presented on a 6 pin connector compatible with the usual TFDI style serial cables. This can optionally be used to power the RC2014 bus (if within safe USB power limits).

This listing is for the PCB only, all other parts will be required - see parts list below. Parts availability is a little tricky at the moment, so make sure to check the parts list to ensure you can source all the parts required.

More information on my blog:

http://blog.tynemouthsoftware.co.uk/2020/05/minstrel-goes-forth.html

RC2014 68B60 Serial with clock.pdf [733.91] KB