NEO-MGA

Multi-purpose chip 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 the exact same chip made with a different pinout or manufacturing process.

It is used for address decoding, communication with the CD drive, for refreshing DRAM, and for buffering serial CDDA data.

=CD pinout=





=MV1A pinout=





=Signals=


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