SIIG, INC.
TWINCOM A.2
| 
 Card Type  | 
 Serial interface  | 
| 
 Chipset Controller  | 
 Unidentified  | 
| 
 I/O Options  | 
 Serial ports (2)  | 
| 
 Maximum Dram  | 
 N/A  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Serial port 1  | 
 J1  | 
 Serial port 2  | 
 J2  | 
| 
 PORT 1 CONFIGURATION  | |
| 
 Port  | 
 jP3  | 
| 
 COM1  | 
 Pins 5 & 9 closed  | 
| 
 COM2  | 
 Pins 6 & 10 closed  | 
| 
 COM3  | 
 Pins 7 & 11 closed  | 
| 
 COM4  | 
 Pins 8 & 12 closed  | 
| 
 Disabled  | 
 Open  | 
| 
 PORT 1 INTERRUPT CONFIGURATION  | |
| 
 IRQ  | 
 jP4  | 
| 
 2  | 
 Pins 1 & 5 closed  | 
| 
 3  | 
 Pins 2 & 6 closed  | 
| 
 4  | 
 Pins 5 & 9 closed  | 
| 
 5  | 
 Pins 6 & 10 closed  | 
| 
 Disabled  | 
 Open  | 
| 
 PORT 2 CONFIGURATION  | |
| 
 Port  | 
 jP3  | 
| 
 COM1  | 
 Pins 1 & 5 closed  | 
| 
 COM2  | 
 Pins 2 & 6 closed  | 
| 
 COM3  | 
 Pins 3 & 7 closed  | 
| 
 COM4  | 
 Pins 4 & 8closed  | 
| 
 Disabled  | 
 Open  | 
| 
 PORT 2 INTERRUPT CONFIGURATION  | |
| 
 IRQ  | 
 jP4  | 
| 
 2  | 
 Pins 3 & 7 closed  | 
| 
 3  | 
 Pins 4 & 8 closed  | 
| 
 4  | 
 Pins 7 & 11 closed  | 
| 
 5  | 
 Pins 8 & 12 closed  | 
| 
 Disabled  | 
 Open  | 
| 
 SECOND SERIAL PORT ACTIVATION  | |
| 
 To activate the second serial port, the following chips must be installed:  | |
| 
 Chip  | 
 Socket  | 
| 
 16450 ASIC  | 
 U1  | 
| 
 1488  | 
 U2  | 
| 
 1489  | 
 U3  |