Add PCB version number in HW
The new gateware release (v4) is not meant to run on version 2.1 boards
or earlier.
For this reason the boards should contain a hardwired HW identification
mechanism. Same as in conv-ttl-blo project #1519
The new gateware release (v4) is not meant to run on version 2.1 boards
or earlier.
For this reason the boards should contain a hardwired HW identification
mechanism. Same as in conv-ttl-blo project #1519