I added I2C decoder, game does this repeatedly:
Write 0x40 to register 0. (Perhaps this means "latch current time")
Read registers 1 and 2
Write 0x00 to register 0. (Reset latch)
EDIT: This would make sense with PCF8593. Bit 6 is "hold last count flag" and 1 and 2 are hundreds of seconds and seconds.
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