A modern diagnostic and repair tool for PS3 Syscon operations — built by NostaMods.
Engineering Preview — test thoroughly before using on important hardware. No warranty provided.
NostaDiag is a standalone Windows GUI for PS3 Syscon work via UART serial. No Python required. No terminal commands. No guessing — just a clean interface that covers everything from a quick health check to full fan curve editing and chip undervolting.
V2 is a complete rewrite. The old tkinter interface was functional but rigid — fixed layouts, no real responsiveness, limited to what the widget library could do. V2 runs in a modern web engine, which means a proper visual design, real interactivity, and an experience that actually matches the complexity of the work you're doing.
Requires: A UART-TTL adapter (CP2102, CH340, FT232, etc.) connected to the PS3 Syscon testpads.
| Feature | Description |
|---|---|
| Health Check | Full diagnostic read — BSN, firmware version, board config, temps, error log, boot count |
| RSX Autopatch | One-click RSX patching for 40nm and 65nm chips, Standard and GGB variants |
| CXR to CXRF | Convert Syscon mode — automatic read, patch, and verify |
| Checksum Correction | Auto-detect wrong checksums and apply the correct write commands |
| Checksum Gate | Disable/enable the checksum gate for EEPROM writes |
| EEPROM Inspector | Read and write raw memory at any address and length |
| Fan Curve Editor | Full CELL + RSX fan table editing, 10 phases each, with thermal shutdown control |
| Fan Presets | Stock, Quiet, and Performance profiles — apply in one click |
| Undervolting | CELL and RSX voltage control via nm-node presets or manual VID slider |
| Direct Commands | Send raw UART commands and read the response directly |
| Connection Guide | Built-in testpad images for all PS3 models |
| Error Codes | Full PS3 Developer Wiki error reference, built-in |
| Sandbox Mode | Full simulation — test everything without connected hardware |
| Persistent Settings | Theme, font, accent color — all saved between sessions |
| Startup | Fan Tuning |
|---|---|
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| RSX Autopatch | Undervolting |
|---|---|
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| Connection Guide | Settings |
|---|---|
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- PS3 console (FAT, Slim, or Super Slim)
- UART-TTL adapter at 3.3V logic level — do not use 5V
- USB cable
- Windows 10 or Windows 11
- No Python installation required (standalone .exe)
Download NostaDiag_v2.0_Setup.exe from Releases and run it.
Settings are stored in %APPDATA%\NostaDiag\ — no admin rights needed after install.
For detailed setup including hardware wiring, driver installation, and first-launch steps, see INSTALL.md.
- Connect UART adapter to PS3 Syscon testpads (TX→RX, RX→TX, GND→GND)
- Select the correct COM port and SC Type
- Click Auth PS3 before any patching operations
- Use Sandbox Mode to explore the interface without connected hardware
Use the built-in Connection Guide to find the correct testpads for your PS3 model.
| SC Type | Console | Fan Control |
|---|---|---|
| CXR | FAT — older Syscon (COK-001) | No |
| CXRF | FAT — Mullion Syscon | Yes |
| SW | Slim / Super Slim | No |
Fan curve editing is only available in CXRF mode.
- Auth gate — patching operations are locked until Syscon authentication succeeds
- Sandbox mode — full dry-run, no UART traffic sent
- Checksum correction — auto-detect and fix EEPROM checksums after writes
- Temperature validation — fan curve phases must be ascending, TMax > TMin enforced
- Voltage reference — built-in VID table and voltage range chart per chip revision
Built on community reverse engineering work:
- M4j0r — foundational work on PS3 Syscon internals, UART protocol, and diagnostic commands
- Sage — reverse-engineered authentication methods and Syscon security mechanisms
- DoublesAdvocat — research and documentation of safe voltage ranges per chip revision
- Calyps0man — UI feedback, visual design input, testing, and research contributions to the Frankenstein mod
- PSX-Place community — Frankenstein mod documentation and RSX swap research
- Reference: Frankenstein PHAT PS3 CECHA with 40nm RSX
Personal, educational and repair use is permitted. Commercial use requires visible credit. Do not rebrand, remove credits, or redistribute modified versions without attribution.
- Instagram: @NostaMods
- Issues: GitHub Issues
Made with care for the PS3 modding community — NostaMods V2 built with Claude Code