Fujitsu FR Family Instruction Manual page 50

CHAPTER 3 REGISTER DESCRIPTIONS
■ Return Pointer Configuration
Figure 3.3-11 shows the bit configuration of the return pointer.
Bit no.
RP
■ Return Pointer Functions
●
Return Pointer in Multiple "CALL" Instructions
Because the "RP" does not have a stack configuration, it is necessary to first execute a save when calling
one subroutine from another subroutine.
●
Initial Value of Return Pointer
The initial value is undefined.
26
Figure 3.3-11 Return Pointer Bit Configuration
31 00