SNK 6502 FPGA Core

Arcade hardware implementation for MiSTer FPGA

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Overview

FPGA implementation of SNK 6502 Hardware (~1981), originally developed and released by SNK/Rock-Ola.

This core targets MiSTer FPGA and aims for accurate gameplay behavior, video timing, and sound reproduction.

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Game Information

Field	Value
Title	Nibbler
Year	1982
Developer	Rock-Ola
Genre	Maze
Players	1–2 alternating

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Controls

Default MiSTer gamepad mapping:

Input	Action
D-Pad / Joystick	Move
Select	Insert Coin
Start	1 Player Start
Right Shoulder	2 Player Start
Left Shoulder	Pause

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Features

• Arcade-accurate CPU timing
• Sprite priority and layer handling
• High score saving support
• MiSTer-compatible .mra provided
• Verified ROM definitions with checksums

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ROM Requirements

ROM files are not included.

To use this arcade core, you must provide legally obtained ROM files.

To simplify setup:

• .mra files are provided in the Releases section.
• The .mra specifies all required ROM files along with checksums.
• The ROM .zip filename corresponds to the naming convention used by the MAME project.

For setup instructions and environment configuration, refer to:

MiSTer Arcade ROM guide:
https://github.com/MiSTer-devel/Main_MiSTer/wiki/Arcade-Roms

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Installation

1. Copy the core .rbf file to your MiSTer /_Arcade/cores folder.
2. Copy the '.mra' file to your MiSTer '/_Arcade' folder.
3. Place the appropriate ROM .zip files in your /games/mame directory.
4. Launch the core from the MiSTer Arcade menu.

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Legal Notice

This project contains no copyrighted game data.

Users are responsible for obtaining and using ROM files in accordance with applicable laws.

Do not request ROM files in issues or discussions.

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Credits

FPGA core development: RodimusFVC Original arcade game © SNK/Rock-Ola

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