[finger563]

Turns off CONFIG_COMPILER_CXX_EXCEPTIONS and CONFIG_COMPILER_CXX_RTTI. Nothing in the firmware needs them: the games and emulator cores are C, nothing uses dynamic_cast or typeid, and the three places that used exceptions didn't need to.

Changes

• sdkconfig.defaults: both options are off, with a comment explaining why.
• main/main.cpp: the terminate handler's rethrow-to-print part is compiled only under __cpp_exceptions.
• components/jk/src/jk.cpp: the frame-buffer reserve() calls check free PSRAM (largest block and total) first, instead of catching std::bad_alloc.
• OpenJKDF2 → 1e9b699 (esp32p4): stdJSON parses settings with nlohmann's non-throwing parse(..., nullptr, false). Before this, a corrupt or truncated openjkdf2.json terminated the engine; now it reads as empty settings.

Size

The image is 283 KB smaller (9,182,032 → 8,892,304 bytes):

• .eh_frame: −169 KB
• code: −66 KB
• read-only data: −47 KB

With XIP from PSRAM, all of that is PSRAM the code no longer occupies.

Testing (Tab5)

I ran an autostart soak test of about 8 minutes: Phantom Menace → Jedi Knight → MGS → Chrono Trigger → Minish Cap → Sonic 2 → Jedi Knight → Phantom Menace, wrapping round to TPM and JK again. That was 10 launches, about 45 s each.

• There were no crashes, aborts or resets.
• JK's engine heap came from the ROM arena each time, with the same frame rates on every launch (about 41 fps in the opening, about 19–20 in-level).
• JK's frame buffers were reserved every time; the "could not reserve" warning never appeared.
• Free internal RAM stayed at about 73 KB after every quit, with no leak across launches.
• Users need to update an existing local sdkconfig themselves (or delete it), because sdkconfig.defaults doesn't override it.

🤖 Generated with Claude Code

[github-actions]

ESP-IDF Size Report for 'Tab5 Emu'

Metric	Base	PR	Delta
FLASH	0 bytes (0.00%)	0 bytes (0.00%)	0 bytes (0.00%)
DRAM	266,678 bytes (60.43%)	267,166 bytes (60.54%)	🔺 +488 bytes (+0.11%)
IRAM	0 bytes	0 bytes	0 bytes
RAM (DRAM+IRAM)	266,678 bytes	267,166 bytes	🔺 +488 bytes (+0.11%)

_{FLASH uses app .bin size or json2 flash sum. RAM sums DRAM+IRAM via idf_size. Percentages shown when totals are available.
DRAM/IRAM usage does not include memory used by the heap allocator at runtime.
This report was generated by esp-idf-size-delta.}