Costum made things


after a long time i found my mega pi and i’m trying to get it working with marlin and my costum printer.
Is here someonene who has done it or could help me?
(Actually i already did it but just the motors aren’t working with a4988 drivers)
P.S. And i wwant to know if it’s capeble with DRV8825 Stepper Motor Drivers.
P.S.S. How to use it as ISP?
Waiting for reply,