Mirrors the C64 text screen to the Pebble watch (with game-specific
umlaut handling), adds a SELECT-triggered key wheel for sending
navigation input back to the emulator, shows a splash screen on watch
launch, and documents the resulting end-to-end architecture.
machine_write_snapshot reads maincpu_regs.pc to record the current
program counter. When called directly from video_canvas_refresh,
maincpu_regs is stale — the CPU loop keeps registers as stack-local
variables and only syncs them to maincpu_regs inside DO_INTERRUPT via
EXPORT_REGISTERS(). The snapshot therefore recorded the wrong PC.
On restore (already trap-based), the wrong PC was faithfully written
back into reg_pc via IMPORT_REGISTERS(), causing the CPU to resume at
a bad address. The game screen looked correct (memory/VIC/SID state
all restored) but the CPU never reached the input-polling code, so
button presses had no effect.
Fix: route machine_write_snapshot through interrupt_maincpu_trigger_trap
so DO_INTERRUPT(IK_TRAP) calls EXPORT_REGISTERS() before the trap
function, capturing the true current PC before the snapshot is written.
Pencil button next to each hero disk opens an editor dialog that parses
the D64 directly, lists all PRG save files in a spinner, and lets the
user adjust all nine stats (Vitalität, grade, six percentage stats) with
+/− buttons. Changes to multiple heroes in one session are written back
together on Save.
PETSCII decoding now distinguishes unshifted (0x41–0x5A → lowercase) from
shifted (0xC1–0xDA → uppercase) so names display in natural mixed case
(e.g. "Mark" instead of "MARK").
D64 sector layout helpers extracted to class level so createBlankD64 and
the new editor share the same offset function. Save format documented in
res/HELD_D64_FORMAT.md. Editor strings localised in EN/DE.
Cross-compiles VICE 3.8 headless for ARM64 and x86_64 as part of the
Android Studio build (Gradle buildVice task + build_vice.sh). The JNI
bridge (vice_jni.c) renders frames into a shared framebuffer read by
C64DisplayView, and forwards key events from C64KeyboardView to VICE's
keyboard matrix. Without ROM files the app shows a placeholder blue
screen; with ROMs and a .d64 disk image the full C64 emulator runs.
ml