sf-cabinet

Tools and utilities for modifying SF2 Cabinets

What

This repository contains research and tooling around the mini Street Fighter 2 cabinet releasd late last year

Current capabilties include:

• SPI flash extraction via the sunxi-fel utilities
  • Note You can also do this in circuit with a SOP8 clip and flashrom, but it's obviously much easier to do this via the FEL loader
• Startup script modification via the scripts listed below
• MINFS partition parsing, allowing for a full extraction of all availalble files

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Tools

• scripts: Bash scripts for extracting filesystem components / reflashing the cabinet via the FEL loader.
  • Note: There is a lot of development code in here
• python: Assorted python scripts to extract files based on the autogenerated Kaitai classes, as well as my original implementation of the MinFS parser in python
• binary-templates: A collection of kaitai and 010Editor templates for use with the entire SPI flash image as well as standalone MinFS filesystem images
• logs: Logfiles generated by modifying the startup.esh script that is launched by the cabinet on startup. This contains a directory listing as well as other debug output about the boot and loading process.

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Current Tasks / Next Steps

• While some files can be viewed normally, others are compressed with some variation of LZMA
  • While we can extract some of these manually, this process could and should be automated
• Decompression of the executable files
  • These are similarly compressed with some form of LZMA, but do not compress as easily as the bitmap files
• Document and write up example of extracting and decompressing the splash screen on boot

Cabinet Specs

• Architecture: ARM (Allwinner SoC)
• Operating System: EPOS
  • Some tools and utiltiies can be found here
  • Some API documentation
• Filesystem(s): MINFS,FAT12
• OSS in Use: FBA