gotc.bat   : batch file for use TC 2.0
gomsc.bat  : batch file for use MSC 5.0/6.0 
rtsdtr.prj : project file for TC++3.0 or BC++ 3.1

file: RTSDTR.C

For test functions:
(1) SetDtrInactive();
(2) SetDtrActive();
(3) SetRtsInactive();
(4) SetRtsActive();

  DTR bit: bit 0 of MCR
  RTS bit: bit 1 of MCR

  DTR pin of COM1 (pin 4)
  RTS pin of COM1 (pin 7)

  when 7188 is reset or set to Inactive mode:
    DTR and RTS bits is reset to 0
    /DTR and /RTS pin of 16C550 is reset to 5V
    DTR(4) and RTS(7) pin of COM1 is reset to about -8V

  When set to Active mode:
    DTR and RTS bits is reset to 1
    /DTR and /RTS pin of 16C550 is reset to 0V
    DTR(4) and RTS(7) pin of COM1 is reset to about +8V