NEO-MGA is a custom chip apparently noone knows (and wants to know) about, which is found in 3 versions in CD systems and some late MVS boards:
- NEO-MGA in the CD1 model (front loading).
- NEO-MGA-T in the CD2 model (top loading) and MV1A MVS boards. Probably the same but made by Toshiba.
- NEO-MGA-T2 in the CDZ, probably with a different pinout and maybe stuff related to the copy protection system.