1. Download EXE file from PC into 7188's RAM-DISK
2. Use COM4 & inturrupt-driven driver to download
       --> 7188's COM4 input  = PC's keyboard
       --> 7188's COM4 output = PC's monitor
3. This method is high speed
4. Working steps are give as following:
   1.  Power-off PC & 7100
   2.  Install the download cable between 7188's COM4 & PC's COM1
   3.  Power-on PC
   4.  Cd \7188 (in PC)
   5.  Run 7188d.exe (in PC)
   6.  Power-on 7188
   7.  You will see the 7188's power-on mesage ares shown on PC's monitor
   8.  Keyin "loadram2" & Enter-key in PC's keyboard
   9.  Keyin "demo1.exe" & Enter-key in PC's keyboard
   10. Keyin ALT-S in PC's keyboard
   11. Keyin "demo1.exe" & Enter-key in PC's keyboard
   12. Keyin "b:" & Enter-key in PC's monitor
   13. Keyin "dir" & Enter-key in PC's monitor
   14. Keyin "demo1.exe" & Enter-key in PC's monitor
   Now you execute demo1.exe in RAM-DISK.