Skip to navigation

⌂ ∞ Revs on the BBC Micro

Driving model: ApplyLimitThrottle

       Name: ApplyLimitThrottle                                      [Show more]
       Type: Subroutine
   Category: Driving model
    Summary: Apply a maximum limit to a 16-bit number, unless the throttle is
             being applied

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * ApplySkidForces calls ApplyLimitThrottle
             * ApplyTyreForces calls ApplyLimitThrottle




 If the throttle is being applied, then set:

   variableG = (A T) * abs(H)

 otherwise set:

   variableG = max((A T), (NN MM)) * abs(H)



 Arguments:

   G                    Offset of the variable to set:

                          * 0 = xTyreForceNose

                          * 1 = xTyreForceRear

                          * 2 = zTyreForceNose

                          * 3 = zTyreForceRear



.ApplyLimitThrottle

 LDY throttleBrakeState \ If throttleBrakeState = 1, then the throttle is being
 DEY                    \ applied, so jump to lims1 to skip applying the maximum
 BEQ lims1              \ value to variableG, so:
                        \
                        \   variableG = (A T) * abs(H)

                        \ Otherwise fall through into ApplyLimitAndSign to set:
                        \
                        \   variableG = max((A T), (NN MM)) * abs(H)