PUBLIC getsp
    PUBLIC putsp
    PUBLIC save_pop
    PUBLIC save_push
    PUBLIC restore_sr
    
    EXTERN SAVE_SR
    EXTERN SAVE_PC
    EXTERN timer0_comm
    
    RSEG CODE

    
getsp:
    MOV    SP,R12 
    ADD.W  #2,R12
    RET
    
       
putsp:    
    MOV    @SP,R14
    MOV    R12,SP 
    SUB.W  #2,SP
    MOV    R14,0(SP)
    RET
    

save_push:
    POP    SAVE_PC
    POP    R10
    PUSH   SAVE_SR
    PUSH   R4
    PUSH   R5
    PUSH   R6
    PUSH   R7 
    PUSH   R12
    PUSH   R13
    PUSH   R14
    PUSH   R15
    PUSH   SAVE_PC
    RET
    
    
save_pop:
    POP    SAVE_PC
    POP    R9
    POP    R8
    POP    R11
    POP    R10
    POP    R15
    POP    R14
    POP    R13
    POP    R12
    POP    R7
    POP    R6
    POP    R5
    POP    R4
    POP    R2
    RET       
    
    
restore_sr:
    MOV    SAVE_SR,SR
    RET
    
    END