[Request] Datel Orbit mapper support (GameShark & ActionReplay)

[Jenetrix]

Datel released two publicly available upgrade Roms (ar_uk.gb and gsonline.gb) for their ActionReplay / GameShark cheat devices for the purpose of flashing to their devices via the original software and hardware toolkit released with them.

These Roms are verified as identical (albeit truncated) to the ones that ship with the devices themselves and have been verified to run correctly when flashed to a revision 3.0 or above GS/AR device via FlashGBX + GBxCartRW, which recently added support for this mapper.

These Roms however do not boot on any currently available emulator due to the lack of mapper support, as well as issues unique to the Roms themselves. (Namely with the header/logo, due to the information being pulled from the info of the connected cartridge on boot.)

Support for this mapper would be helpful in enabling use of Sameboy's debugging tools for the purpose of disassembling these two Roms, to research making custom replacement software for these devices.