SMC Command 0x85

Set Real Time Clock

This Command Message sets the real time clock to the specified count of milliseconds since 11-15-2001 00:00:00 UTC, represented in hex, with the least significant byte being first. This code is identical to the original Xbox Real Time Clock (RTC) code.

The maximum value that the clock can be set to is FFFFFFFFFF, representing 09/17/2036 19:53:47 UTC. After this, the clock will wrap around.

Message:	85 XX XX XX XX XX XX YY ZZ

	Meaning
XX	Number of miliseconds since epoch.
YY	Boolean; whether time is in sync.
ZZ	Unknown; seemingly always 00.