Neogeo diag mvs cha neo zmc board
About the Neogeo diag mvs cha neo zmc board
Neogeo diag mvs cha neo zmc board is an open source PCB design by jwestfall69, published on GitHub under the Unlicense license. It is a 2-layer board measuring 173.9 × 134 mm, with 14 components from 8 distinct parts.
Other key parts include the NEO-ZMC, 27C010 / 27C1001 and 74HC574. By type, the board carries 5 ICs, 5 capacitors and 4 connectors.
From the project
The NeoGeo uses bank switching to allow full access to the M1 rom. This is normally handled by a custom NEO-ZMC chip on the CHA board. I ended up making 3 different boards you can choose from to deal with this bank switching:
The NeoGeo uses bank switching to allow full access to the M1 rom. This is normally handled by a custom NEO-ZMC chip on the CHA board. I ended up making 3 different boards you can choose from to deal with this bank switching:
2 Boards that replace the NEO-ZMC with a CPLD (Socketed PLCC44 and TQFP44):
Personally I would go with the NEO-ZMC based board since the NEO-ZMC is available as NOS for around $2 each. More on this in the BOM below. Additionally with the chip shortage its a little difficult to get the CPLDs, plus the fun of programming them.
Main components on the Neogeo diag mvs cha neo zmc board
Neogeo diag mvs cha neo zmc board bill of materials (BOM)
14 components, 8 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | NEO-ZMC | SOIC-24W_7.5x15.4mm_P1.27mm | U1 |
| 2 | 27C010 / 27C1001 | DIP-32_W15.24mm_Socket_LongPads | U2, U3 |
| 2 | 74HC574 | SO-20_5.3x12.6mm_P1.27mm | U4, U5 |
| 1 | neogeo-mvs-cha-a-side-edge | neogeo-mvs-a-side-edge | J1 |
| 1 | neogeo-mvs-cha-a-side-edge | neogeo-mvs-cha-edge-test-points | J2 |
| 1 | neogeo-mvs-cha-b-side-edge | neogeo-mvs-cha-edge-test-points | J3 |
| 1 | neogeo-mvs-cha-b-side-edge | neogeo-mvs-b-side-edge | J4 |
| 5 | 100nf | C_0805_2012Metric | C1, C2, C3, C4, C5 |
Neogeo diag mvs cha neo zmc board design files
The KiCad project lives in the jwestfall69/neogeo-diag-mvs-cha repository on GitHub; these links point at the commit this page was built from.
Neogeo diag mvs cha neo zmc board: common questions
How big is the Neogeo diag mvs cha neo zmc board?
The Neogeo diag mvs cha neo zmc board measures 173.9 × 134 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Neogeo diag mvs cha neo zmc board?
14 components, from 8 distinct parts. The full bill of materials is listed on this page.
Where can I download the Neogeo diag mvs cha neo zmc board design files?
From the jwestfall69/neogeo-diag-mvs-cha repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Neogeo diag mvs cha neo zmc board design in my own project?
Yes, under the terms of its Unlicense license, which jwestfall69 chose for the repository.
