UNIDENTIFIED
RS-232C ADAPTER
Card Type | Serial card |
Chip Set | Unidentified |
Maximum Onboard Memory | Unidentified |
I/O Options | Serial ports (2) |
Data Bus | 8-bit ISA |
CONNECTIONS | |||
Function | Label | Function | Label |
Serial port 1 | CN1 | Serial port 2 | CN2 |
SERIAL PORT 1 ADDRESS SELECTION | ||
Setting | S1/1 | S1/3 |
3E8h | Off | On |
3F8h | On | Off |
Disabled | Off | Off |
SERIAL PORT 2 ADDRESS SELECTION | ||
Setting | S1/2 | S1/4 |
2E8h | Off | On |
2F8h | On | Off |
Disabled | Off | Off |
Technical note: Must install an INS 8250 chip in slot IC4 to enable dual serial port capabilities. Or - 1488 into IC2 and 1489 into to U9. |
SERIAL PORT 1 INTERRUPT SELECTION | ||
IRQ | S1/5 | S1/6 |
IRQ3 | Off | On |
IRQ4 | On | Off |
Disabled | Off | Off |
SERIAL PORT 2 INTERRUPT SELECTION | ||
IRQ | S1/7 | S1/8 |
IRQ3 | Off | On |
IRQ4 | On | Of |
Disable | Off | Off |