Geometrizer Vita: Difference between revisions

Geometrizer Vita
Geometrizer Vita
General
Author	frangarcj
Type	Arcade
Version	20260711
License	N/A
Last Updated	2026/07/01
Links
	Download
	Website
	Source

Latest revision as of 05:35, 12 July 2026

Geometrizer is a Sega Model 1 arcade-board emulator written in C11, targeting Virtua Racing, running on macOS and the PlayStation Vita.

The project is a playground for AI-assisted development: most of the code is written by an AI coding agent iterating in a tight loop against real hardware, reference traces, and an emulator oracle. The goal is less "ship a polished emulator" and more "see how far an AI can drive a hard, low-level systems project" - cycle-accurate CPU cores, a custom geometry DSP, a software 3D pipeline, and a from-scratch GPU renderer on a 2012 handheld.

Status: experimental / work-in-progress. Virtua Racing boots, renders, and plays on both targets.

Screenshots

Changelog

v2026-07-11

First Release.

External links

GitHub - https://github.com/frangarcj/geometrizer
VitaDB - https://www.rinnegatamante.eu/vitadb/#/info/1432

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 |image_alt=Geometrizer Vita
 }}
-Geometrizer is a Sega Model 1 arcade-board emulator written in C11, targeting Virtua Racing, running on macOS and the PlayStation Vita. The project is described first and foremost as a playground for AI-assisted development: most of its code is written by an AI coding agent iterating against real hardware, reference traces, and an emulator oracle, with the goal of testing how far an AI can drive a difficult, low-level systems project — including cycle-accurate CPU cores, a custom geometry DSP, a software 3D pipeline, and a GPU renderer built from scratch for a 2012 handheld.
+Geometrizer is a Sega Model 1 arcade-board emulator written in C11, targeting Virtua Racing, running on macOS and the PlayStation Vita.
-Its status is listed as experimental / work-in-progress, with Virtua Racing reported to boot, render, and play on both target platforms.
+The project is a playground for AI-assisted development: most of the code is written by an AI coding agent iterating in a tight loop against real hardware, reference traces, and an emulator oracle. The goal is less "ship a polished emulator" and more "see how far an AI can drive a hard, low-level systems project" - cycle-accurate CPU cores, a custom geometry DSP, a software 3D pipeline, and a from-scratch GPU renderer on a 2012 handheld.
-== Features ==
+Status: experimental / work-in-progress. Virtua Racing boots, renders, and plays on both targets.
-'''Architecture'''
-* V60 — NEC V60 main CPU (16 MHz), variable-length ISA, with both interpreter and DRC/JIT execution
-* TGP — MB86233 geometry DSP handling 3D transform/lighting/clipping with custom non-IEEE floating point, also with interpreter and DRC execution
-* Bus — a 32-region address map mapping to flat memory or I/O callbacks
-* Video — a display-list pipeline (parse → transform → light → clip → Z-sort → rasterize) plus S24 tilemaps for the HUD
-* Sound — M68000 CPU, YM3438 sound chip, two MultiPCM chips, and an optional DSB, all command-driven over a UART
-* Each CPU runs in its own cooperative libco fiber, scheduled round-robin with timeslices proportional to clock rate
-'''PlayStation Vita build (performance-focused, vitasdk/vitaGL)'''
-* vitaGL (GLES2) backend rendering directly to the framebuffer
-* GPU-side geometry, moving object transform/project/clip/cull into a vertex shader, with the opaque pass using a per-object draw path
-* GPU-rendered S24 HUD/background tilemaps using native Cg integer shaders with FBO caching
-* Sound processing (M68000 plus sound chips) run on its own dedicated thread
-* An overlapped emulation/video pipeline, where the emulator runs on a dedicated worker core while the main thread submits GL output for the previous frame
-* Platform-specific glue including libco built on SceFiber, JIT code/data placed in a VM memory domain, deferred present, and runtime tuning via trigger files stored in ux0:data/geometrizer/
 ==Screenshots==
@@ Line 52: / Line 37: @@
 == External links ==
-* Github - https://github.com/frangarcj/geometrizer
+* GitHub - https://github.com/frangarcj/geometrizer
 * VitaDB - https://www.rinnegatamante.eu/vitadb/#/info/1432