Add platform contribution steps and nav

Add an "Add a new platform" section to CONTRIBUTING.md (instructions to write a scraper in scripts/scraper/, create platform YAML in platforms/, register in platforms/_registry.yml, and submit a PR) and note contributor crediting. Update README: bump verified files from 7,296 to 7,302, add RomM and RetroDECK contributor credits with PR links, and refresh the auto-generated timestamp. Add sdlpal to the mkdocs.yml navigation.

CONTRIBUTING.md

@@ -7,6 +7,16 @@
 3. Variants (alternate hashes): `bios/Manufacturer/Console/.variants/`
 4. Create a Pull Request - checksums are verified automatically
 
+## Add a new platform
+
+1. Write a scraper in `scripts/scraper/`
+2. Create the platform YAML in `platforms/`
+3. Register in `platforms/_registry.yml`
+4. Submit a Pull Request
+
+Contributors who add platform support are credited in the README,
+on the documentation site, and in the BIOS packs.
+
 ## File conventions
 
 - Files >50 MB go in GitHub release assets (`large-files` release)

README.md

@@ -2,7 +2,7 @@
 
 Complete BIOS and firmware packs for Batocera, BizHawk, EmuDeck, Lakka, Recalbox, RetroArch, RetroBat, RetroDECK, RetroPie, and RomM.
 
-**7,296** verified files across **396** systems, ready to extract into your emulator's BIOS directory.
+**7,302** verified files across **396** systems, ready to extract into your emulator's BIOS directory.
 
 ## Quick Install
 
@@ -46,7 +46,7 @@ Each file is checked against the emulator's source code to match what the code a
 - **10 platforms** supported with platform-specific verification
 - **329 emulators** profiled from source (RetroArch cores + standalone)
 - **396 systems** covered (NES, SNES, PlayStation, Saturn, Dreamcast, ...)
-- **7,296 files** verified with MD5, SHA1, CRC32 checksums
+- **7,302 files** verified with MD5, SHA1, CRC32 checksums
 - **8765 MB** total collection size
 
 ## Supported systems
@@ -118,8 +118,8 @@ To keep packs accurate, each file is checked against the emulator's source code.
 
 ## Contributors
 
-<a href="https://github.com/PixNyb"><img src="https://avatars.githubusercontent.com/u/40770831?v=4" width="50" title="PixNyb"></a>
+<a href="https://github.com/PixNyb"><img src="https://avatars.githubusercontent.com/u/40770831?v=4" width="50" title="PixNyb"></a> RomM [#37](https://github.com/Abdess/retrobios/pull/37)
-<a href="https://github.com/monster-penguin"><img src="https://avatars.githubusercontent.com/u/266009589?v=4" width="50" title="monster-penguin"></a>
+<a href="https://github.com/monster-penguin"><img src="https://avatars.githubusercontent.com/u/266009589?v=4" width="50" title="monster-penguin"></a> RetroDECK [#36](https://github.com/Abdess/retrobios/pull/36)
 
 
 ## Contributing
@@ -130,4 +130,4 @@ See [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines.
 
 This repository provides BIOS files for personal backup and archival purposes.
 
-*Auto-generated on 2026-04-02T05:33:10Z*
+*Auto-generated on 2026-04-02T13:28:54Z*

mkdocs.yml

@@ -138,6 +138,7 @@ nav:
   - VTech: systems/vtech.md
   - Vircon: systems/vircon.md
   - ZC: systems/zc.md
+  - sdlpal: systems/sdlpal.md
 - Emulators:
   - Overview: emulators/index.md
   - Official ports (63):