Verilog definitions of custom SNK NeoGeo chips, for repairs and preservation.
Also see https://github.com/neogeodev/NeoChips
Details can be found at https://wiki.neogeodev.org/index.php?title=Category:Chips
The only 5V-tolerant parts still made with enough I/Os and small enough are Microchip ATF and Lattice 4000ZE.
| Chip name | CPLD | Cells used |
|---|---|---|
| PCM | LC4128ZE | 70% ##############------ |
| NEO-257 | LC4064ZE | 25% #####--------------- |
| NEO-273 | LC4064ZE | 59% ############-------- |
| NEO-D0 | LC4064ZE | 62% ############-------- |
| NEO-G0 | XC9572XL | 71% ##############------ |
See [chip name].v for notes about each chip.
