AST RESEARCH TECHNICAL BULLETIN TB-0240 10/29/86 CARBON COPY WITH USE WITH ANY SERIAL PORT OR COMMUNICATIONS DEVICE The application program "Carbon Copy" uses IRQ4 in its normal operations. If Carbon Copy is to be used often it should be considered as a serial device in the system, and as such COM1 should be allocated for its use. Any other serial port that is to be used while Carbon Copy is operating should be configured as COM2.