NEO-ZMC2



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

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

Pinout


OpenOffice Draw file:

NEO-ZMC part: "SORD0" = SDRD0
 * A0,A1,A8~A15: Z80 address bus
 * MA11~M21: M ROM address outputs (NEO-ZMC part)

PRO-CT0 part:
 * 12M: Input, 12MHz clock, outputs next pixel on falling edge
 * GAD0~GAD3: Outputs, pixel A color data
 * GBD0~GBD3: Outputs, pixel B color data
 * LOAD: Input, latch C ROM data (on rising edge ?)
 * C0~C31: Inputs, C ROM data bus (2*16 bits). Gives all the pixel data needed for a 8 pixel line.
 * H: Input, when high, reverse bit order of pixels (used for sprites horizontal flipping)
 * DOTA: Output, high when pixel A is opaque
 * DOTB: Output, high when pixel B is opaque