QUATECH, INC.
PXB-721
|
Card Type |
I/O controller |
|
Chipset/Controller |
Intel |
|
I/O Options |
8255 I/O ports (3) |
|
Maximum DRAM |
N/A |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
34-pin 8255 interface 1 |
H1 |
34-pin 8255 interface 3 |
H3 |
|
34-pin 8255 interface 2 |
H2 | ||
|
BASE MEMORY ADDRESS SELECT | ||||||
|
Address |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
SW1/5 |
SW1/6 |
|
230h |
Off |
On |
On |
On |
Off |
Off |
|
260h |
Off |
On |
On |
Off |
Off |
On |
|
2E0h |
Off |
On |
Off |
Off |
Off |
On |
|
300h |
Off |
Off |
On |
On |
On |
On |
|
350h |
Off |
Off |
On |
Off |
On |
Off |
|
EXTERNAL INTERRUPT EDGE | |
|
Edge |
J1 |
|
Rising |
Pins 1 & 3 closed |
|
Falling |
Pins 1 & 2 closed |
|
INTERRUPT SELECT | ||||||
|
IRQ |
J5/A |
J5/B |
J5/C |
J5/D |
J5/E |
J5/F |
|
IR/FONT> |
Open |
Open |
Open |
Open |
Open |
Closed |
|
IRQ3 |
Open |
Open |
Open |
Open |
Closed |
Open |
|
IRQ4 |
Open |
Open |
Open |
Closed |
Open |
Open |
|
IRQ5 |
Open |
Open |
Closed |
Open |
Open |
Open |
|
IRQ6 |
Open |
Closed |
Open |
Open |
Open |
Open |
|
IRQ7 |
Closed |
Open |
Open |
Open |
Open |
Open |
|
PORT 1 INTERRUPT SELECT | |
|
IRQ |
J2 |
|
A |
Pins 2 & 3, 4 & 5 closed |
|
B |
Pins 1 & 2, 5 & 6 closed |
|
PORT 2 INTERRUPT SELECT | |
|
IRQ |
J3 |
|
A |
Pins 2 & 3, 4 & 5 closed |
|
B |
Pins 1 & 2, 5 & 6 closed |
|
PORT 3 INTERRUPT SELECT | |
|
IRQ |
J4 |
|
A |
Pins 2 & 3, 4 & 5 closed |
|
B |
Pins 1 & 2, 5 & 6 closed |
