Atari800 - How to enable true analog joystick support for 5200 games?

Hi all. Been working on getting Atari 5200 emulation via the atari800 core sorted on my Retropie box. Good news is that all games run, cartridge types have been set properly, controller type has been set to “Atari joystick”, and machine type has been set to “5200”. This has everything working with my PS4 controller digitally.

However the analog stick doesn’t work in an analog fashion - it behaves digitally too and any directional movements correspond to 100% movement in one of the 8 compass directions (up, up-right, right, down-right, down, down-left, left, up-left). For games like Star Wars Arcade, this renders the game essentially unplayable.

I’ve searched all over and can’t find an obvious solution (to me anyway). Any advice or assistance would be appreciated.

TIA!

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