(1. A string multiplication operation is added, for example:
The result of 'ABC' * 3 is' ABC ABC ABC ', which is especially convenient to fill in NOP or others continuously when modifying files
2. New conversion function between RVA VA RA
Six of them are RVA 2 VA (addr), RVA 2 RA (addr), etc.
3. New write string function
ws1(addr, str)
ws2(addr, str))