v26.05

This is the first major release after the great file restructure.

Full Changelog: v26.03...v26.05

Highlights

• Massive internal source code restructure across the disassembly:
  • Extracted and reorganized many shared subroutines
  • Improved file layout and include structure
  • Merged duplicate revision-specific files where possible
  • Standardized REV00/REV01 naming conventions
• Major documentation overhaul:
  • Fully documented the Sonic player object
  • Fully documented all major game mode routines
  • Expanded documentation for collision, scrolling, object handling, Dynamic Level Events, HUD mappings, palette cycles, and various engine quirks
• Large-scale cleanup of animation scripts, mappings, constants, labels, comments, and SST definitions
• Improved Linux/Mono compatibility for utility projects and tools
• Restored and maintained bit-perfect / bit-accurate builds throughout major refactors

Bug Fixes

• Added and expanded numerous FixBugs fixes:
  • Display-and-delete bugs
  • Title card issues
  • Unsafe VDP access to Hud_Base
  • Drowning-related fixes
  • v_chunk0collision handling
  • Subpixel clearing fixes
• Fixed SonLVL crashes caused by spike helix mappings
• Fixed Mono compilation issue in Ring.cs
• Corrected various inaccurate comments and outdated bugfixes

Engine and Code Improvements

• Introduced various new constants and macros, including:
  • VBlank routine constants
  • FG/BG constants
  • Boss SST constants
  • lvlsize and dcb
• Replaced make_art_tile helper usage with compound constants
• Converted demos to macro-based demoinput format
• Added warning for undersized RAM declarations
• Added build_and_run.bat convenience script

Data, Asset, and Tooling Cleanup

• Revamped animation scripts and cleaned up mappings labels and unlabeled tables/data
• Added missing SonLVL objects
• Renamed and reorganized various assets, scripts, and utility project files
• Changed uncompressed graphics extensions to .unc

Documentation and Research Notes

• Documented and clarified various internal engine behaviors, including:
  • CalcAngle and CalcSine
  • Platform SSTs
  • Initialization code
  • REV00 scrolling routines
  • MZ lava brick wobble quirk
  • Shared origins of Yad_ChkWall

Miscellaneous

• Removed legacy "S U B R O U T I N E" comments
• Added S1SSEdit.undo to .gitignore
• Updated README with disassembly structure documentation links

v26.03

This is the last "original" version of the Sonic 1 GitHub disassembly before the major file restructure after March 2026.

It's also the first disassembly release after AS and ASM68K branches were fully aligned again.

Full Changelog: https://github.com/sonicretro/s1disasm/commits/v26.03