Creating a HAL component for a Baruffaldi RH150 lathe turret ATC

Hi all,
I am still very much a newcomer to linuxcnc having migrated from the darkest depth of mach3.
Might seem a tad optimistic but i enjoy the challenge. i believe i need to create a component to control my lathe turret. the rest of the machine conversion i'm happy enough to get on with but this i need some pointers on.
i currently have the electrical manual for the turret which includes detailed logic and timing diagrams and i have been sent config files (including hal, ini and tc component) from a machine running a similar turret by Filipe at eusurplus.
where do i start to learn more about writing and editing components? specifically in layman's terms that a simpleton like me can manage. i would prefer not to just have it done for me as i genuinely would like to learn.
Can someone point me in the right direction?
Jonny.

Hi Jonny,

maybe look at two examples, I can provide 2 different changers.

This is a lathe turret changer (one direction only):
github.com/mydani/linuxcnc_misc/blob/main/emcochanger.comp
This is a disc changer on a mill:
github.com/mydani/linuxcnc_misc/blob/main/ac20changer.comp

The important command is "halcompile --install <yourfile.comp>".
Afterwards loadrt <yourcomp> in the hal and you are there...

Regards

Daniel

cheers daniel, i'm having a look at it now. does your emcochanger.comp really use m6 rather than txxxx? or is that just an error in the comments?
the comments are very useful btw thanks.