date & time,

target: intel pentium 266mhz
os: qnx4.25

We have used int386 funcion to set/get date&time so far.
So we used rtc time instead of QNX time.
I think this function use BIOS call.

Anyone tell me the difference between int386 & date function?
I think we better use date function for better performance and safety. Am i
right.