Experiments on Arduino with larger register writes and FIFO write ...

Getting some corruption on the Arduino RAM buffers.
Logic analyser traces show that the tables are getting corrupted
and the wrong data is being written to the radio registers.

Managed to write/read the mode register from real RFM69 with Arduino

Reset, select, write working on Arduino

SPI being driven on Arduino

Got simple 5 pin interface with GPIO working on Arduino Pro Micro