This repository is archived now that it has been merged upstream into Ghidra. The SuperH SH-1/SH-2 processor module (and many bug fixes!) are included with the 9.1 release of Ghidra. File any bug reports with the Ghidra repository and I (VGKintsugi) will take a look.

Ghidra Sega Saturn Processor Module

A (WIP) Ghidra processor module for the Sega Saturn. The Sega Saturn uses dual SuperH SH-2 processors for games and a dedicated SuperH SH-1 to control the CD-ROM drive.

Currently:

• able to disassemble SH-1 and SH-2 after manually specifying the processor type. I used the instruction encodings available from Renesas SH Instruction Set Summary and related GitHub project shared-ptr/sh_insns.
• contains SLEIGH definitions for all instructions. Currently debugging through issues related to sign extensions, flags, and branches.
• able to decompile automatically. Output looks reasonable but likely to have issues due to errors in the SLEIGH definitions.

Todo:

• fix remaining errors in SLEIGH definitions
• create loader plugin (in a separate project)

Screenshots

Processors

Loader

Disassembly View (Decompiler working, still has some bugs)

Issues

I fixed a lot of the errors in the SLEIGH definitions but I anticipate there will be more bugs.

Installation

• Rename the root folder to SuperH and copy it to Ghidra/Processors/ and restart Ghidra

Credits

• shared-ptr/sh_insns - SH-1/SH-2 instruction definitions
• Yabause - Sega Saturn emulator I used to verify my disassembly and execution
• Sega Saturn Multiplayer Task Force - repo of homebrew Sega Saturn games with source code
• xyzz/ghidra-mep - example Ghidra processor module
• Thog/ghidra_falcon - example Ghidra processor module