// Basic: a.sam
//
// int main() {
//    return 100;
// }

PUSHIMM 0    // space for return value of program (result of main())
PUSHFBR      // save current FBR (starts at 0)
PUSHIMM 1    // need to push 1 for FBR
POPFBR       // set FBR to 1
JSR main     // invoke main and push next address on the stack
POPFBR       // reinstall old FBR
STOP         // end program
main:        // label of first command is function name
ADDSP 0      // allocate local variables (params already taken care of!)
PUSHIMM 100  // push value 100 to return
STOREOFF -1  // store return value in return variable
ADDSP 0      // pop off local variables
JUMPIND      // return to caller

// Program area:
// 0: PUSHIMM 0
// 1: PUSHFBR
// 2: PUSHIMM 1
// 3: POPFBR
// 4: JSR main //address:7
// 5: POPFBR
// 6: STOP
// 7: ADDSP 0
// 8: PUSHIMM 100
// 9: STOREOFF -1
// 10: ADDSP 0
// 11: JUMPIND