masm memcpy 2

.MODEL FLAT, STDCALL
OPTION NOKEYWORD:<size>
OPTION PROLOGUE:NONE
OPTION EPILOGUE:NONE

.CODE

__MyMemcpy PROC _dest : DWORD, _source : DWORD, _size : DWORD
    PUSH ESI
    PUSH EDI
    MOV EDI, DWORD PTR [ESP + 0CH]
    MOV ESI, DWORD PTR [ESP + 10H]
    MOV ECX, DWORD PTR [ESP + 14H]
__AGAIN:
    LODSB
    STOSB
    LOOP __AGAIN
    POP EDI
    POP ESI
    RETN 0CH
__MyMemcpy ENDP

END