TCPnet: switching between PPP and Ethernet at runtime

Hello, I have a couple questions regarding TCPnet that I would appreciate some assistance on: 1) I am using raw TCP/IP sockets and at runtime I need to be able to dictate which communication...
TCPNet PPP sometimes fails

I am using RL-ARM TCPnet in an attempt to set up a PPP connection to Windows XP. Sometimes it all works well; i can connect to my device and i can normally exchange tcp packets. Other times, ppp links...
bank switch link fail

Link fail !! when I set the bank switch area to 0000h~efffh , error message : ADRESS SPACE OVERFLOW CODE but , 0000h~ffffh bank setting is OK ,and I'm sure My bank0&1 code size < 40k. Did I missing...
switch case fail

void xx(char cc) { char aa; switch(cc) { case 1:case 0: aa=1; break; case 2,3: aa=2; break; } } //---------------------------------- xx(0); //run OK xx(1); //run OK xx(2); //run FAIL <<*...