Help Frimware Delta Rostock

Please help me about Frimware Delta Rostock printer.
Now that I’ve set up the hardware, but now I can not figure out how to load and edit the Frimware settings for my Adriano machine so hard and complicated. I am currently using Adruno Mega 2560 and Roam 1.4 microcontroller step A4988 I would like to ask the Bro help me in setting up Frimware.
My machine parameters
The whole height is 500mm
200mm head height
Height from printed desk to Enstop 415mm
Joints 190mm long
Stepper motors I used Step 42 1.8 degrees
Below is a picture of my machine

(deleted)

Show at I can not get Firmware of the Delta this type. Really hardness too expect you help you