BlackMark
2133627057
pureboot.py (Python stdlib only): images as raw binary or Intel HEX, flash and EEPROM programming with read-back verify, erase composites, fuse and info readout, activation-timeout configuration, and the tinies' reset-vector surgery — the trampoline word below the loader, page 0 written last. The test spawns a simavr device (pureboot_device.c) — the mega's USART as a pty; on the tinies a cycle-timed GPIO<->pty bridge for the polled software UART plus the NVM module simavr's tiny cores lack (their SPM opcode ioctls into a void and silently does nothing) — and drives it with the real tool: knock from reset (erased-flash walk on the tinies), program and verify both memories, timeout write, session reconnect, an external reset through the patched vector, hand-over, and the fixture application's banner. Results are cross-checked against ground-truth memory dumps and an independent decode of the surgery's rjmp words, red-verified against a sabotaged encoder. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>