NEO-GRZ
Very late (last ?) revision of the NEO-GRC2 chip, used on the MV1C, CDZ and ROM-only arcade boards.
Integrates the video logic, fast VRAM, palette RAM, the line buffers and the L0 ROM in one chip. Slow VRAM is still external.
Palette RAM and video RAM errors above $8000 are generally bad news.
Uses a 3.3V power supply for its core, 5V for i/o.