but when i download my code into dev board,the baudrate become 1/2 that means 4800.How this happen?
obvious possibilities:
1) your crystal is 1/2 what you think
2) PCON is different in your simulator
3) the simulatot assumes a 6 clocker and you are using a 12 clocker


PS FX? are you using those ancient chips, or does FX mean something else?

Erik