CyberVGA

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                       ENGINE OF THE PAST
                 32-BIT MS-DOS // VGA MODE X PIPELINE

A software 3D engine built for MS-DOS constraints

Software-rendered.
Fixed-point math.
VGA Mode X.
Now available as a standalone SDK.

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What CyberVGA is

CyberVGA is a from-scratch 32-bit engine built around late MS-DOS hardware limits.

No GPU pipeline. No modern graphics APIs. Fixed-point arithmetic in performance-critical paths.

Rendering is CPU-side, with:

• VGA Mode X (320×240 planar memory)
• Q16.16 fixed-point math
• C + NASM software raster path
• Brush-to-octree static world rendering

This is not a retro look filter. It is a constraint-driven engine.

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Included in this release

• Win64 SDK — pre-compiled static library, headers, editor, viewer, Blender exporters, and build script
• DOS SDK — ready-to-run DOSBox-X package with the engine, editor, and toolchain
• CyberEdit (CEDIT) world editor
• Complete reference docs
• Asset pipeline tools (CMS/CAN exporters)
• Demo content and world data

CyberEdit runs in the same rendering environment as the runtime, so what you author is what you see.

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Core features

Rendering

• Software raster pipeline in C + NASM
• Mode X planar rendering with page-flip workflow
• Dynamic sky / time-of-day system (sun/moon + stars + gradient)
• Distance fog via lookup/shade tables
• Static world rendered through brush-to-octree baking
• Dithered terrain layer blending
• Cached lighting on baked geometry

World and entities

• CWR world format with octree sidecar support
• Brush authoring and triangle baking
• World meshes, billboards, particle emitters, sound sources
• Entity authoring and runtime pools
• Component-style entity flags (mesh / sound / light / physics / gravity / think / etc.)
• Sphere collision

Audio and tools

• Sound Blaster spatial mixing path
• In-engine editor with Play Mode
• Undo/redo, snap grid, debug overlays
• Full engine and editor reference manuals included

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Technical snapshot

• Language: C (DJGPP / MSVC) + NASM
• Runtime model: 32-bit protected mode on DOS (DPMI)
• Renderer: software (CPU only)
• Math: Q16.16 fixed-point in critical runtime paths
• Target class: 486 / early Pentium era constraints (or modern emulation / DPMI hosts)

Most hard limits are compile-time constants documented in the included engine reference.

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Reference docs

• CVGA-API-REF.TXT — API reference for engine.
• CEDIT-MANUAL.TXT — Editor controls, workflows, key bindings, object editing, play mode, save/load/bake flow

These are the same docs used during development.

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Design approach

CyberVGA treats hardware limits as design inputs, not nostalgia props.

• Explicit memory budgets
• Explicit arithmetic costs
• Minimal abstraction over core systems
• Visible, inspectable behavior from tools through runtime

Goal: not to imitate the past visually, but to work honestly inside its technical envelope.

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Licensing

This itch.io release is proprietary.
Source and assets are not included here unless explicitly stated for a given release.

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Follow development

If you’re into software rasterization, fixed-point engines, DOS-era rendering, or low-level graphics engineering, follow the project and check the devlogs for updates.

Still C + NASM. Still software render-first. Still built around real constraints.