BOCA RESEARCH, INC. I/O 450 Card Type Parallel/Serial card Chip Set AT-type GM 82C 455 Maximum Onboard Memory None I/O Options Parallel port (2), serial port (2) Data Bus 8-bit ISA Floppy drives supported None [Image] CONNECTIONS Function Label Function Label 26-pin Parallel port 2 J1 9-pin serial port 1 J4 10-pin serial port 2 J3 25-pin parallel port 1 J7 USER CONFIGURABLE SETTINGS Function Label Position » Serial port 1 enabled J2/A Pins 2 & 3 closed Serial port 1 disabled J2/A Pins 1 & 2 closed » Serial port 2 enabled J2/B Pins 2 & 3 closed Serial port 2 disabled J2/B Pins 1 & 2 closed » Parallel port 1 enabled J2/C Pins 2 & 3 closed Parallel port 1 disabled J2/C Pins 1 & 2 closed » Parallel port 2 enabled J2/D Pins 2 & 3 closed Parallel port 2 disabled J2/D Pins 1 & 2 closed SERIAL PORT 1 ADDRESS SELECTION Setting J2/E » COM1 (3F8h) Pins 2 & 3 closed COM3 (3E8h) Pins 1 & 2 closed SERIAL PORT 2 ADDRESS SELECTION Setting J2/F » COM2 (2F8h) Pins 2 & 3 closed COM4 (2E8h) Pins 1 & 2 closed PARALLEL PORT 1 INTERRUPT SELECTION IRQ J2/G 5 Pins 2 & 3 closed » 7 Pins 1 & 2 closed PARALLEL PORT 2 INTERRUPT SELECTION IRQ J2/H » 5 Pins 2 & 3 closed 7 Pins 1 & 2 closed SERIAL PORT 1 INTERRUPT SELECTION IRQ J2/I J2/J J2/K J2/L 3 Pins 2 & 3 Open Open Open closed » 4 Open Pins 2 & 3 Open Open closed 5 Open Open Pins 2 & 3 Open closed 9 Open Open Open Pins 2 & 3 closed SERIAL PORT 2 INTERRUPT SELECTION IRQ J2/I J2/J J2/K J2/L » 3 Pins 1 & Open Open Open 2closed 4 Open Pins 1 & 2 Open Open closed 5 Open Open Pins 1 & 2 Open closed 9 Open Open Open Pins 1 & 2 closed