At 19:54 07.02.99 +0100, you wrote:
>Hi. Here's an EASY question:
>How to check whether the difference is zero?
>
>movlw   .67
>subwf   BYTE_TO_CHECK
>btfsc   STATUS,Z
><command 1>
><other command>
>
>If BYTE_TO_CHECK is .67, the result of the thrird instruction will be zero
>(67-67=0).
>My questions:
>* If the diff. is 0, will the Z flag of STATUS be set or cleared?
The Zero-Bit is set, if the result of an operation equals zero. => set
>* In the above code: Will <command 1> be executed if BYTE_TO_CHECK is .67?
btfsc means bit test file, skip if clear. => yes, <command 1> will be executed
but hereafter <other command> will also be executed.

--
 ciao
  Jens Wilmer
http://www.lc.uni-muenster.de/~wilmerj/