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  | 
| 
 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 closed  | 
 Open  | 
 Open  | 
 Open  | |
| » | 
 4  | 
 Open  | 
 Pins 2 & 3 closed  | 
 Open  | 
 Open  | 
| 
 5  | 
 Open  | 
 Open  | 
 Pins 2 & 3 closed  | 
 Open  | |
| 
 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 & 2closed  | 
 Open  | 
 Open  | 
 Open  | 
| 
 4  | 
 Open  | 
 Pins 1 & 2 closed  | 
 Open  | 
 Open  | |
| 
 5  | 
 Open  | 
 Open  | 
 Pins 1 & 2 closed  | 
 Open  | |
| 
 9  | 
 Open  | 
 Open  | 
 Open  | 
 Pins 1 & 2 closed  | |