Jaguar and 3DO
The Atari Jaguar and the 3DO do not belong to the main console families. Jaguar games run much of their code on two RISC co-processors. Ghidra has no module for them. The 3DO uses an ARMv3 CPU, older than any ARM language Ghidra builds in. The handhelds are in the Handhelds section.
The platforms
| Platform | Year | CPU | Media | Ghidra module or loader | Emulator with a debugger |
|---|---|---|---|---|---|
| Atari Jaguar | November 1993 | 68000 at 13.295 MHz; Tom and Jerry RISC at 26.59 MHz | Cartridge | 68000; no Tom or Jerry module | BigPEmu (closed), Virtual Jaguar |
| 3DO | October 1993 | ARM60 (ARMv3) at 12.5 MHz | CD; Portfolio OS | ARM v4 and up only | Opera (not confirmed) |
Atari Jaguar
Hardware
The 68000 runs at 13.295 MHz. Tom and Jerry are 32-bit RISC cores at 26.591 MHz, with 4 KB and 8 KB of local RAM. The console has 2 MB of RAM. A memory controller flaw makes it awkward to run RISC code from main RAM, so developers ran more of their code on the 68000 (Wikipedia: Atari Jaguar). The main loop runs on the 68000 and uploads RISC code (Game Tech Wiki: Jaguar). Tom has two banks of thirty-two 32-bit registers (not confirmed) (Jagdox general).
Tools
Ghidra builds in the 68000. No Ghidra module is known for Tom and Jerry (GitHub search). MAME's jaguar core file carries a BSD-3-Clause header.
BigPEmu is Rich Whitehouse's closed-source Jaguar emulator, written for Digital Eclipse's Atari 50. Whether it has a debugger is unknown. Virtual Jaguar is the open alternative, now maintained by Joseph Mattiello, with GPU, DSP and blitter timing models (Game Tech Wiki: Jaguar).
For an exact reimplementation
Game code is split across the 68000 and the RISC cores. Find and export each CPU's code separately. The RISC code is often taken from a RAM dump after the 68000 uploads it.
3DO
Hardware
The ARM60 is an ARMv3 core at 12.5 MHz. The Madam and Clio chips hold the cel engine. Games run on the Portfolio OS (3DO Interactive Multiplayer).
Tools
Ghidra's ARM languages start at v4, so the ARM60 has no exact built-in match. Opera runs the games (not confirmed).
Projects to learn from
rawgl by cyxx reimplements the Another World engine and reads the 3DO data among others. It was archived on 28 June 2025 (cyxx/rawgl).