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⌂ ∞ ▽ Elite on the BBC Micro and NES

Version analysis of FAROF2

This code appears in the following versions (click to see it in the source code):

Code variations between these versions are shown below.

       Name: FAROF2
       Type: Subroutine
   Category: Maths (Geometry)
    Summary: Compare x_hi, y_hi and z_hi with A



 Compare x_hi, y_hi and z_hi with A, and set the C flag if all three <= A,
 otherwise clear the C flag.



 Returns:

   C flag               Set if x_hi <= A and y_hi <= A and z_hi <= A

                        Clear otherwise (i.e. if any one of them are bigger than
                        A)



.FAROF2

Code variation 1 of 2A variation in the labels only

Tap on a block to expand it, and tap it again to revert.

Cassette, Electron
Flight, 6502SP, Master
 CMP INWK+1             \ If A < x_hi, C will be clear so jump to MA34 to
 BCC MA34               \ return from the subroutine with C clear, otherwise
                        \ C will be set so move on to the next one

 CMP INWK+4             \ If A < y_hi, C will be clear so jump to MA34 to
 BCC MA34               \ return from the subroutine with C clear, otherwise
                        \ C will be set so move on to the next one

 CMP INWK+1             \ If A < x_hi, C will be clear so jump to FA1 to
 BCC FA1                \ return from the subroutine with C clear, otherwise
                        \ C will be set so move on to the next one

 CMP INWK+4             \ If A < y_hi, C will be clear so jump to FA1 to
 BCC FA1                \ return from the subroutine with C clear, otherwise
                        \ C will be set so move on to the next one

 CMP INWK+7             \ If A < z_hi, C will be clear, otherwise C will be set

Code variation 2 of 2A variation in the labels only

Tap on a block to expand it, and tap it again to revert.

Cassette, Electron
Flight, 6502SP, Master
.MA34

.FA1

 RTS                    \ Return from the subroutine