I am trying to familiarize my self the 7C80 and 7C81 cards.  I have multiple projects for them.  a couple of lathes, an update to a minimill currently running parallel port.  And enhancing my Skyfire P2 with 4th and 5th Axis and Highspeed spindle.  The Skyfire is currently running parallel port to 7I76 and probably be able to handle the changes but, I want a testbed before I make the changes and to exercise the drivers and their programming.  Once I start the mods I don't want to be down and extended period of time.

On the lathes I will initially do the mini first to learn before growing to the 14" x 40".

I currently have the pi4 4G the latest raspbian converted with RT-Prempt but now I need to configure and use mesaflash.  halcmd and halrun work but I get errors with hm2_spi.

I can't seem to find the starting place.  Please provide some hints.

Hubert



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