BRAIN BOXES AT TRIPLE RS232 Card Type Serial card Chip Set Unidentified Data Bus 8-bit ISA [Image] CONNECTIONS Function Label Function Label 9-pin serial port 1 CN1 9-pin serial port 3 CN3 9-pin serial port 2 CN2 SERIAL PORT 1 ADDRESS SELECTION COM port Address IRQ J1 COM1 3F8h IRQ4 Pins 1 & 2 closed » COM2 2F8h IRQ3 Pins 3 & 4 closed COM3 3E8h IRQ3 Pins 5 & 6 closed COM4 2E8h IRQ3 Pins 7 & 8 closed COM5 1A0h IRQ3 Pins 9 & 10 closed COM6 1A8h IRQ3 Pins 11 & 12 closed COM7 1B0h IRQ3 Pins 13 & 14 closed COM8 1B8h IRQ3 Pins 15 & 16 closed SERIAL PORT 2 ADDRESS SELECTION COM port Address IRQ J2 COM1 3F8h IRQ4 Pins 1 & 2 closed COM2 2F8h IRQ3 Pins 3 & 4 closed » COM3 3E8h IRQ3 Pins 5 & 6 closed COM4 2E8h IRQ3 Pins 7 & 8 closed COM5 1A0h IRQ3 Pins 9 & 10 closed COM6 1A8h IRQ3 Pins 11 & 12 closed COM7 1B0h IRQ3 Pins 13 & 14 closed COM8 1B8h IRQ3 Pins 15 & 16 closed SERIAL PORT 3 ADDRESS SELECTION COM port Address IRQ J3 COM1 3F8h IRQ4 Pins 1 & 2 closed COM2 2F8h IRQ3 Pins 3 & 4 closed COM3 3E8h IRQ3 Pins 5 & 6 closed » COM4 2E8h IRQ3 Pins 7 & 8 closed COM5 1A0h IRQ3 Pins 9 & 10 closed COM6 1A8h IRQ3 Pins 11 & 12 closed COM7 1B0h IRQ3 Pins 13 & 14 closed COM8 1B8h IRQ3 Pins 15 & 16 closed SERIAL PORT IRQ SELECTION IRQ JP1 JP2 JP3 IRQ2 Pins 11 & 12 Pins 11 & 12 Pins 11 & 12 closed closed closed IRQ3 Pins 9 & 10 Pins 9 & 10 Pins 9 & 10 closed closed closed » IRQ4 Pins 7 & 8 Pins 7 & 8 Pins 7 & 8 closed closed closed IRQ5 Pins 5 & 6 Pins 5 & 6 Pins 5 & 6 closed closed closed IRQ6 Pins 3 & 4 Pins 3 & 4 Pins 3 & 4 closed closed closed IRQ7 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed IRQ10 Pins 13 & 14 Pins 13 & 14 Pins 13 & 14 closed closed closed IRQ11 Pins 15 & 16 Pins 15 & 16 Pins 15 & 16 closed closed closed IRQ12 Pins 17 & 18 Pins 17 & 18 Pins 17 & 18 closed closed closed IRQ14 Pins 19 & 20 Pins 19 & 20 Pins 19 & 20 closed closed closed IRQ15 Pins 21 & 22 Pins 21 & 22 Pins 21 & 22 closed closed closed Note: JP1 controls COM1. JP2 controls COM2. JP3 controls COM3.