Street Fighter III: 3rd Strike – PSP Port
A PSP port of Street Fighter III: 3rd Strike, based on the PS2/PC decompilation.
–Controls–
Start+Select: Soft reset (returns to title screen)
Press Start at boot: Disable backgrounds (debug)
Press Select at boot: play as Player 2
–Settings–
Screen Settings
Screen mode
-“Stretch” for full screen
-“Square” for pseudo 4:3
-“Native” for 384×224 resolution
-“Vertical” for native width, expanded height
-“Extended” for experimental rendering
Filter
-“Nearest” for nearest scaling
-“Bilinear” for #define PSP_FATar scaling
Scaling mode
-“Fast” for scaling each vertex
-“Smooth” for scaling the whole canvas
Color correction
-“On” to emulate a CRT’s colors
-“OFF” for original colors
Sound Settings
Choose between stereo or mono
Change the volume for the music and the sound effects
Choose either “Arranged” soundtrack or “Original”
–Tecnical Features–
Rendering
Native CPS3 resolution (384×224) centered on PSP screen (480×272)
Per-vertex offset scaling with scissor clipping for clean pixel rendering
No sub-pixel seams or texture atlas bleeding
Shadow transparency via GU_TFX_MODULATE
Audio – Complete Pipeline
BGM: CRI ADX ADPCM decoder with 48kHz to 44.1kHz resampling
SFX: PS2 SPU2 emulator (48 voices, VAG/ADPCM, ADSR envelopes)
Character voices: Per-character BD sound banks loaded from AFS
VS screen jingle: In-memory ADX playback (ADX_StartMem)
Seamless BGM: Gapless segment transitions with preload system
Capcom Sound Engine (CSE): Full PHD/TSB bank system for SE dispatch
I/O
AFS archive reader with background I/O thread
Async file reads for asset loading (LDREQ queue)
Sync reads for audio (gapless transitions)
Single AFS file handle design
Performance
333MHz CPU clock on “Smooth” rendering, 266MHz on “Fast” rendering
SPU emulator: MAX_ACTIVE_VOICES=10 cap, linear interpolation, unrolled ADPCM decode
-O3 -ffast-math compiler optimization
Graceful error recovery (no freeze traps)
Save System
Screen settings and sound setting can be saved using the PSP’s native api, and it also saves the arcade progress (rankings and arcade completion) which unlocks extra colors (holding start when selecting a character)
Known Issues
Seamless BGM segment transitions have a minor audible click on some tracks
White noise burst possible on SPU voices with invalid start addresses (mitigated with address validation)
Author: demmis98
Version 1.1
release date: April 20, 2026
Source: https://github.com/demmis98/3s-psp
