//----------------------------------------------------//
// Generic template for function invocation           //
//----------------------------------------------------//

// this code starts building the NEW frame for 
// the function that has been called

// Make space for rv:
   PUSHIMM 0 // or ADDSP 1

// Store the current FBR value, which represents the
// location of the current frame. The current frame is
// the frame below the new one SaM is building. SaM 
// will be able to "locate" the previous with the
// saved FBR:
   PUSHFBR

// Push the parameter values:
   _code_for_pushing_param_values

// Set up new FBR for n params:
   PUSHSP       // push SP ("top" of stack)
   PUSHIMM n+1  // push # of params+1
   SUB          // SP - (params+1)
   POPFBR       // store new FBR in the *register*

// Call function f
   JSR f

// Pop params
   ADDSP -n

// Restore "old" FBR; now the FBR contains the
// *previous* value of FBR, which had been saved:
   POPFBR