I have an 8051 that is connected to a data slicer circuit which is connected to a radio receiver. I am wanting to use a bit bang routine to read the first 9 bits of the sync pattern in the data packet on P2.0. The begining of the data has a sync pattern of (158H)with no start or stop bit, the problem I am having is I need to read 9 bits and then do a CJNE 158H. But the 158H is 9 bits, since the acc is only 8 bits I am not sure how to read all 9 bits. Does anyone have any recommendations on how to accomplish this?

Thank you,
Craig