After hooking up the 315-5881 encryption/compression emulation to Model 3 I collected some data from Dirt Devils and sent it to Metallic in order for him to search for a key. He found one, and now the HUD graphics (text etc. on the screen) get correctly decrypted and decompressed – something which is currently lacking in the ‘SuperModel’ emulator. Here are some shots of Dirt Devils running in MAME with the text layer working.
As this is MAME, and this is a ‘modern’ 3D game it doesn’t really run too well on my hardware (although I’ve heard it’s not so bad on an i7) so fingers crossed this brings the SuperModel team back to life and they backport some of this work.