BRAIN BOXES
AT ONE PORT RS232
| 
 Card Type  | 
 Serial card  | 
| 
 Chip Set  | 
 Unidentified  | 
| 
 Data Bus  | 
 8-bit ISA  | 
| 
 CONNECTIONS  | |
| 
 Function  | 
 Label  | 
| 
 9-pin serial port  | 
 CN1  | 
| 
 SERIAL PORT ADDRESS SELECTION  | ||||
| 
 COM port  | 
 Address  | 
 IRQ  | 
 JP1  | |
| 
 COM1  | 
 3F8h  | 
 IRQ4  | 
 Open  | |
| » | 
 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  | 
 JP2  | |
| 
 IRQ2  | 
 Pins 11 & 12 closed  | |
| » | 
 IRQ3  | 
 Pins 9 & 10 closed  | 
| 
 IRQ4  | 
 Pins 7 & 8 closed  | |
| 
 IRQ5  | 
 Pins 5 & 6 closed  | |
| 
 IRQ6  | 
 Pins 3 & 4 closed  | |
| 
 IRQ7  | 
 Pins 1 & 2 closed  | |
| 
 IRQ10  | 
 Pins 13 & 14 closed  | |
| 
 IRQ11  | 
 Pins 15 & 16 closed  | |
| 
 IRQ12  | 
 Pins 17 & 18 closed  | |
| 
 IRQ14  | 
 Pins 19 & 20 closed  | |