//MODE COM4 9600,0,8,1
//ASSIGN COM4 < SIN > SOUT 
// please "dir vtreg"  and show the 
MODE COM2 115200,0,8,1
ASSIGN COM2 < S0IN > S0OUT 
//MODE COM1 9600,0,8,1
//ASSIGN COM1 < S0IN > S0OUT