Keyboard: SetSteeringLimit

       Name: SetSteeringLimit                                        [Show more]
       Type: Subroutine
   Category: Keyboard
    Summary: Apply a maximum limit to the amount of steering
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * ProcessDrivingKeys (Part 2 of 6) calls SetSteeringLimit


 Arguments:

   C flag               The result of CMP steeringHi


 Returns:

   (A T)                A is set to |steeringHi steeringLo|


IF _SUPERIOR OR _REVSPLUS

.SetSteeringLimit

 BCC slim1              \ Before calling this routine, we did a CMP steeringHi,
                        \ so if A < steeringHi, jump to slim1 to return from
                        \ the subroutine

 LDA steeringLo         \ Set T = steeringLo with bit 0 cleared
 AND #%11111110
 STA T

 LDA steeringHi         \ Set A = steeringHi, so (A T) = (steeringHi steeringLo)
                        \ with the sign bit in bit 0 cleared

.slim1

 RTS                    \ Return from the subroutine

ENDIF