# The sound program's functions the game's sound board puts its own in place of (runtime/src/sound_cpu.c):
# tools/decompile_sound.py writes their definitions as BOARD_ORIGINAL(name), which is original_name.
sound_reset   # reached by the program itself (command FF jumps to 0000), the reset leaves what the program was in: the board starts its loop over after it
check_rom     # the reset's ROM test: the game has no program ROM to add up, so the board takes the time good chips take
