0:470h Timer Overflow flag
Length: 1 byte
Keeps track of whether midnight has passed since the machine was
powered on. See the 4-byte integer counter at 0:46Ch for more details.
Notes: Note that this byte is only a flag. It either has a
value of 0 or 1. Therefore, it won't reflect a day
change over a two-day period.
Use INT 1Ah, Service 00h, to obtain this overflow
value. Note that doing so clears this byte.
See also: INT 1Ah, 00h
See also: 0:46Ch
Next: 0:471h Break Key State