NEO-ZMC2



NEO-ZMC and PRO-CT0 in one package. The PRO-CT0 is a network of multiplexers (32-bit C ROM bus to two 4 bpp pixel outputs).

Die pictures for sale: https://chipworks.secure.force.com/catalog/productdetails?cartID=9b3949c7-2063-4ea2-8a17-eb3324a3b4ba&sku=SNK-NE0-ZMC2&viewState=DetailView

See also http://www.dg-enterprises.com/chapter1.html

Found in second revision MVS boards (for the PRO-CT0 logic only) and AES carts.

Pinout


OpenOffice Draw file:

NEO-ZMC part:
 * SDA0,SDA1,SDA8~SDA15: Z80 address bus
 * MA11~M21: M ROM address outputs

PRO-CT0 part, inputs: Outpus:
 * 12M: 12MHz clock, outputs next pixel on falling edge.
 * C0~C31: C ROM data bus (2*16 bits). Gives all the pixel data needed for a 8 pixel line.
 * H: When high, reverse bit order of pixels shifted out (used for sprites horizontal flipping)
 * EVEN: Swap A/B pixels.
 * LOAD: Latch C ROM data (on rising edge ?).
 * DOTA: High when pixel A is opaque (color > 0)
 * DOTB: High when pixel B is opaque (color > 0)
 * GAD0~GAD3: Pixel A color data
 * GBD0~GBD3: Pixel B color data