NEO-MGA

NEO-MGA is found in CD systems and some late MVS boards:
 * NEO-MGA in the CD1 model (front loading).
 * in the CD2 model (top loading) and MVS boards. Probably the same but made by Toshiba.
 * in the CDZ, probably with a different pinout and maybe stuff related to the copy protection system.

It is used for communication with the CD drive, for handling program and work DRAM access, some address decoding and for buffering serial CDDA data.

=Pinout=





=Signals=


 * DRM*, RAS, CAS, WRITE: See TC514400 DRAM datasheet.
 * X*: See LC8953 datasheet.