Source review: October 11, 2026. Pokémon mini research and hobby hardware use project-specific procedures. Verify the exact cartridge, firmware and tool version instead of assuming one universal workflow.
Use the actual developer documents
The pokemon-mini developer repositories preserve research on the processor, memory map, cartridge layout, graphics, timers and hardware registers. Some documents explicitly include unknown behavior, so research notes should not be treated as a complete manufacturer specification. Keep the revision of a document used for a project and mark an inferred behavior as an inference. A result observed in one emulator is useful evidence but does not settle how every physical unit behaves.
Choose a documented C workflow
The c88-pokemini project provides scripts and makefiles for an EPSON/TASKING S1C88 C toolchain. Its repository documents different host requirements for Linux, macOS and Windows. This is a platform-specific toolchain, not ordinary desktop C compilation. Read the dependency and license instructions before running installer scripts, and retain the chosen compiler and helper versions. Do not combine an old example's makefile with an unrecorded collection of binaries from unrelated archives.
Build the supplied example unchanged
Begin with the repository's example and capture a full build log. Confirm which output is the final .min image and record its size and checksum. Test that image in the documented emulator before changing the source. If it fails, investigate the toolchain installation, linker output and image structure first. Once the example is repeatable, make a single visible change and rebuild. This creates a smaller diagnostic problem than introducing graphics, input, timers and save writes at the same time.
Design a modest test program
For early hardware tests, create a readable screen showing program version, button states and a simple timing indicator. Add sound and optional hardware features separately. Treat EEPROM writes as a deliberate feature with a backup plan, not a harmless side effect of testing. Document how your program identifies and stores its data so it does not unexpectedly disturb another game's persistent records. Keep original assets and their licenses alongside the source. A small diagnostic can later become a useful repair and emulator comparison tool.
Validate the deployment path
PM2040's project documentation explains converting a supported image into cartridge firmware and matching that firmware to its hardware. Keep the original .min separate from the generated UF2 and record every conversion setting. Verify the program on a real console using a stable battery and a documented cartridge workflow. Compare input, timing, sound and persistence with the emulator, then report differences with a minimal reproducible example. Release your source, build instructions and tested configuration together. A homebrew release becomes much easier to preserve when another developer can produce the same image and understand which parts were confirmed on hardware and which remain research questions.
Sources and project documentation
- Pokémon mini developers: S1C88 C toolchain and examples
- Pokémon mini developers: preserved hardware-research documents
- zwenergy: PM2040 cartridge hardware, firmware and image conversion
Prepare hardware tests with cartridge and EEPROM preservation.