I'm using a Philips 87lpc764 controller with compiler v6.02/simulator v2.02. When initializing the serial port, the transmit/receive baudrate of serial window of the similator always changes to zero. The hardware itself is working fine... The code used: init_rs232 () { TR1 = 0; TMOD &= 0x0F; TMOD |= 0x20; TH1 = 0xFA; ET1 = 0; PCON |= 0x80; SCON = 0xD0; ES = 1; EA = 1; TR1 = 1; } Loading the SCON register does the change to zero in the serial port window of the simulator. Is anyone else having the same problem or is there a solution for this problem ? Thanks,