DECISION COMPUTER INTERNATIONAL CO., LTD.
PCCOM 8-BIT ISA 4-PORT RS-422 (OLD)
|
Card Type |
Serial |
|
Chipset |
National Semiconductor |
|
I/O Options |
Serial ports (4) |
|
Data Bus |
8-bit ISA |
|
CONNECTIONS | |||
|
Function |
Label |
Function |
Label |
|
Serial ports via 40 pin header |
CN1 |
Serial ports via DB-37 connector |
CN2 |
|
Note:Standard DB-25 serial ports are provided on included adapter cables. | |||
|
USER CONFIGURABLE SETTINGS | |||
|
Setting |
Label |
Position | |
| » |
Factory configured - do not alter |
J1 |
Unidentified |
| » |
Bus speed set to 16MHz or lower |
JP2 |
Pins 1 & 3 closed |
|
Bus speed set higher than 16MHz |
JP2 |
Pins 2 & 4 closed | |
| » |
Factory configured - do not alter |
SW1/6 |
Unidentified |
| » |
Factory configured - do not alter |
SW1/7 |
Off |
| » |
Factory configured - do not alter |
SW1/8 |
Unidentified |
|
OPERATING SYSTEM | |||||
|
Setting |
SW1/3 |
SW1/4 |
SW1/5 |
U24 | |
| » |
XENIX mode |
Off |
Off |
On |
XENIX PROM |
|
MS-DOS mode |
On |
On |
Off |
MS-DOS PROM | |
|
SERIAL PORT ADDRESSES (XENIX) | ||||||
|
Port 1 |
Port 2 |
Port 3 |
Port 4 |
SW1/1 |
SW1/2 | |
|
3F8h (COM1:) |
2F8h (COM2:) |
2B0h |
2B8h |
On |
On | |
|
3F8h (COM1:) |
2F8h (COM2:) |
1B0h |
1B8h |
On |
Off | |
| » |
2A0h |
2A8h |
2B0h |
2B8h |
Off |
On |
|
1A0h |
1A8h |
1B0h |
1B8h |
Off |
Off | |
|
SERIAL PORT ADDRESSES (MS-DOS) | |||||
|
Port 1 |
Port 2 |
Port 3 |
Port 4 |
SW1/1 |
SW1/2 |
|
3F8h (COM1:) |
2F8h (COM2:) |
3E8h (COM3:) |
2E8h (COM4:) |
On |
On |
|
280h |
288h |
290h |
298h |
On |
Off |
|
2F8h (COM2:) |
3E8h (COM3:) |
2E8h (COM4:) |
280h |
Off |
On |
|
3E8h (COM3:) |
2E8h (COM4:) |
280h |
288h |
Off |
Off |
|
INTERRUPT (XENIX) | |||||||
|
Setting |
JP4/A |
JP4/B |
JP4/C |
JP4/D |
JP4/E |
JP4/F | |
|
IRQ2 |
Pins 1 & 2 |
Open |
Open |
Open |
Open |
Open | |
|
IRQ3 |
Open |
Pins 1 & 2 |
Open |
Open |
Open |
Open | |
|
IRQ4 |
Open |
Open |
Pins 1 & 2 |
Open |
Open |
Open | |
| » |
IRQ5 |
Open |
Open |
Open |
Pins 1 & 2 |
Open |
Open |
|
IRQ6 |
Open |
Open |
Open |
Open |
Pins 1 & 2 |
Open | |
|
IRQ7 |
Open |
Open |
Open |
Open |
Open |
Pins 1 & 2 | |
|
Note:Pins designated in closed position. | |||||||
|
PORT 1 INTERRUPT (MS-DOS) | ||||||
|
Setting |
JP3/A |
JP3/B |
JP3/C |
JP3/D |
JP3/E |
JP3/F |
|
IRQ2 |
Pins 2 & 3 |
Open |
Open |
Open |
Open |
Open |
|
IRQ3 |
Open |
Pins 2 & 3 |
Open |
Open |
Open |
Open |
|
IRQ4 |
Open |
Open |
Pins 2 & 3 |
Open |
Open |
Open |
|
IRQ5 |
Open |
Open |
Open |
Pins 2 & 3 |
Open |
Open |
|
IRQ6 |
Open |
Open |
Open |
Open |
Pins 2 & 3 |
Open |
|
IRQ7 |
Open |
Open |
Open |
Open |
Open |
Pins 2 & 3 |
|
Note:Pins designated are in the closed position. | ||||||
|
PORT 2 INTERRUPT (MS-DOS) | ||||||
|
Setting |
JP3/A |
JP3/B |
JP3/C |
JP3/D |
JP3/E |
JP3/F |
|
IRQ2 |
Pins 1 & 2 |
Open |
Open |
Open |
Open |
Open |
|
IRQ3 |
Open |
Pins 1 & 2 |
Open |
Open |
Open |
Open |
|
IRQ4 |
Open |
Open |
Pins 1 & 2 |
Open |
Open |
Open |
|
IRQ5 |
Open |
Open |
Open |
Pins 1 & 2 |
Open |
Open |
|
IRQ6 |
Open |
Open |
Open |
Open |
Pins 1 & 2 |
Open |
|
IRQ7 |
Open |
Open |
Open |
Open |
Open |
Pins 1 & 2 |
|
Note:Pins designated are in the closed position. | ||||||
|
PORT 3 INTERRUPT (MS-DOS) | ||||||
|
Setting |
JP4/A |
JP4/B |
JP4/C |
JP4/D |
JP4/E |
JP4/F |
|
IRQ2 |
Pins 2 & 3 |
Open |
Open |
Open |
Open |
Open |
|
IRQ3 |
Open |
Pins 2 & 3 |
Open |
Open |
Open |
Open |
|
IRQ4 |
Open |
Open |
Pins 2 & 3 |
Open |
Open |
Open |
|
IRQ5 |
Open |
Open |
Open |
Pins 2 & 3 |
Open |
Open |
|
IRQ6 |
Open |
Open |
Open |
Open |
Pins 2 & 3 |
Open |
|
IRQ7 |
Open |
Open |
Open |
Open |
Open |
Pins 2 & 3 |
|
Note:Pins designated are in the closed position. | ||||||
|
PORT 4 INTERRUPT (MS-DOS) | ||||||
|
Setting |
JP4/A |
JP4/B |
JP4/C |
JP4/D |
JP4/E |
JP4/F |
|
IRQ2 |
Pins 1 & 2 |
Open |
Open |
Open |
Open |
Open |
|
IRQ3 |
Open |
Pins 1 & 2 |
Open |
Open |
Open |
Open |
|
IRQ4 |
Open |
Open |
Pins 1 & 2 |
Open |
Open |
Open |
|
IRQ5 |
Open |
Open |
Open |
Pins 1 & 2 |
Open |
Open |
|
IRQ6 |
Open |
Open |
Open |
Open |
Pins 1 & 2 |
Open |
|
IRQ7 |
Open |
Open |
Open |
Open |
Open |
Pins 1 & 2 |
|
Note:Pins designated are in the closed position. | ||||||
|
DIAGNOSTIC LED(S) |
|
The function of the LED is unidentified. |