I'm a beginner with the 8051, and am looking for advice on the best way to read the status of a 4 position DIP switch. I'm using Port 2, and as it is now I am setting P2 high, then reading it into the accumulator and calling a different subroutine based on whether the value matches my desired combinations of switch positions.

For example, a result of #00001011 would indicate that the first, third, and fourth switches are on. From there I subtract the value from 1111 and jump if not zero to the next test where I again read it in, subtract it from 1111 and jump if not zero.

It seems like I'm going through too many steps though. Is there any simpler, or shorter way to do it?

Thanks..

Jake