Maths (Geometry): SCALEY

       Name: SCALEY                                                  [Show more]
       Type: Subroutine
   Category: Maths (Geometry)
    Summary: Scale the y-coordinate in A
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * TT103 calls SCALEY
             * TT14 calls SCALEY
             * TT22 calls SCALEY


 This routine (and the related SCALEY2 and SCALEX routines) are called from
 various places in the code to scale the value in A. This scaling can be
 changed by changing these routines (for example, by changing an RTS to an LSR
 A). This code is left over from the conversion to other platforms, where
 the scale factor might need to be different.

 The original source contains the comment "SCALE Scans by 3/4 to fit in".


.SCALEY

 LSR A                  \ Halve the value in A