Hi, I'm new to Atari 8 bit computers having grown up with C64 and Spectrums. I recently bought a bargain 800XL from eBay (yes, miracles do sometimes happen). I don't have any software yet but I was able to get the machine into self test mode (what a cool feature!) and it passes just fine.
There seems to be some after-market mod on the system, can anyone tell me what it's for? Here's a picture of it:-
There's three switches at the back. I tried flipping them but all that seems to happen is the machine boots to a blank screen.
Does anyone have any idea what this might be? My intention with the machine is to RGB mod it using Lotharek's VBXE board and probably add a flash cart of some description too. Hopefully whatever this is won't interfere with that!
Thanks in advance for any help