Restunts 32x — Development skill for Claude Code

Restunts 32X

A port of the **Restunts** rendering core (the reverse-engineering of *Stunts / 4D Sports Driving*, 1990) to the **Sega 32X**. It runs on real hardware and in accurate emulators (tested headlessly in PicoDrive).

`restunts.32x` is a 512 KiB ROM. Load it in a 32X emulator (PicoDrive, Ares, Kega Fusion, BlastEm-32x) or flash it to 32X hardware.


What it is

A 3D showroom that renders the **actual Stunts models**, extracted from the game's own resource files, using Restunts' real rendering pipeline on the SH-2:

• 5 real cars — Chevrolet Corvette ZR1, Porsche 962, Lamborghini Countach, Lancia Delta, Acura NSX — each in its correct default paint colours.
• 4 real track pieces — the vertical loop, corkscrew, pipe, and banked road (extracted from GAME1.P3S, the same shape format as the cars).
• Driving mode — a real chase-cam drive around the DEFAULT.TRK circuit. The road, terrain, and car are all rendered from an arbitrary first-person camera (not just an orbiting turntable), the car is placed and z-buffered into the scene with the rest of the world, and simple arcade physics (accelerate, on/off-road friction, steering) drive it around. Press Start to cycle Showroom -> Track view -> Driving -> Showroom.
• Pipeline: rotate → perspective-project (integer, no 64-bit divide) → flat-shaded fill with a per-pixel z-buffer for hidden-surface removal. A Stunts car isn't a convex hull, so a z-buffer (nearest surface wins) is what correctly shows the exterior; it's verified pixel-identical to an independent reference renderer.
• All fixed-point math; no FPU. Sound slave runs the PWM mixer.

Press **A / C** to cycle through all 9 models.

Controls (3-button pad)

**Showroom / track view:**

Button	Action
D-pad L / R	Orbit (yaw)
D-pad U / D	Pitch
A	Pre