Compare two 16 Bit numbers, require flag when one greater than the =
other?

Anyone have the solution?


For example:

Registers
------------------------------
Number_2_HI_Byte
Number_2_LO_Byte

Number_1_HI_Byte
Number_1_LO_Byte
------------------------------

I have a fixed number in Number_2 (lets say 0x01 0xFF)

Number_1 is a very fast counter that starts at 0x00 0x00, I wish to know =
when it is greater than Number_2=20

I then require a flag to be set, indicating that it is so!

I have tried a subtraction routine but these roll over, I need either a =
subtraction routine that doesn't roll over and gives 0x00 0x00 or =
something else?

Thanks Gary

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