CNET TECHNOLOGY, INC.
CN120A, CN120AB, CN120AT, CN120SBT CN120ST, CN120TP
|
NIC Type |
ARCnet |
|
Transfer Rate |
2.5Mbps |
|
Data Bus |
8-bit ISA |
|
Topology |
Star Linear Bus |
|
Wiring Type |
RG-62A/U 93ohm coaxial Unshielded twisted pair |
|
Boot ROM |
Available |
|
NODE ADDRESS | ||||||||
|
Node |
SW2/1 |
SW2/2 |
SW2/3 |
SW2/4 |
SW2/5 |
SW2/6 |
SW2/7 |
SW2/8 |
|
0 |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
|
1 |
On |
Off |
Off |
Off |
Off |
Off |
Off |
Off |
|
2 |
Off |
On |
Off |
Off |
Off |
Off |
Off |
Off |
|
3 |
On |
On |
Off |
Off |
Off |
Off |
Off |
Off |
|
4 |
Off |
Off |
On |
Off |
Off |
Off |
Off |
Off |
|
251 |
On |
On |
Off |
On |
On |
On |
On |
On |
|
252 |
Off |
Off |
On |
On |
On |
On |
On |
On |
|
253 |
On |
Off |
On |
On |
On |
On |
On |
On |
|
254 |
Off |
On |
On |
On |
On |
On |
On |
On |
|
255 |
On |
On |
On |
On |
On |
On |
On |
On |
|
Note:Node address 0 is used for messaging between nodes and must not be used. A total of 255 node address settings are available. The switches are a binary representation of the decimal node addresses. Switch 1 is the Least Significant Bit and switch 8 is the Most Significant Bit. The switches have the following decimal values: switch 1=1, 2=2, 3=4, 4=8, 5=16, 6=32, 7=64, 8=128. Turn on the switches and add the values of the on switches to obtain the correct node address. (On=1, Off=0) | ||||||||
|
BOOT ROM | ||
|
Setting |
JP1 | |
| » |
Disabled |
Open |
|
Enabled |
Closed | |
|
CABLE TYPE | ||
|
Type |
JP3 | |
| » |
RG-62A/U 93ohm coaxial |
Pins 2 & 3, 5 & 6 closed |
|
Unshielded twisted pair |
Pins 1 & 2, 4 & 5 closed | |
|
ONBOARD TERMINATOR | ||
|
Setting |
JP4 | |
| » |
Disabled |
Pins 2 & 3 closed |
|
Enabled |
Pins 1 & 2 closed | |
|
INTERRUPT SELECTION | |
|
IRQ |
JP2 |
|
2/9 |
Pins 9 & 10 closed |
|
3 |
Pins 7 & 8 closed |
|
4 |
Pins 5 & 6 closed |
|
5 |
Pins 3 & 4 closed |
|
7 |
Pins 1 & 2 closed |
|
BASE MEMORY ADDRESS & BOOT ROM ADDRESS | |||||||
|
Base Address |
Boot ROM Address |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
SW1/5 | |
|
C0000h |
C2000h |
On |
On |
On |
On |
On | |
|
C4000h |
C6000h |
On |
On |
Off |
On |
On | |
|
CC000h |
CE000h |
On |
On |
On |
Off |
On | |
| » |
D0000h |
D2000h |
On |
On |
Off |
Off |
On |
|
D4000h |
D6000h |
On |
On |
On |
On |
Off | |
|
D8000h |
DA000h |
On |
On |
Off |
On |
Off | |
|
DC000h |
DE000h |
On |
On |
On |
Off |
On | |
|
E0000h |
E2000h |
On |
On |
Off |
Off |
Off | |
|
I/O BASE ADDRESS | ||||
|
Address |
SW1/6 |
SW1/7 |
SW1/8 | |
|
260h |
On |
On |
On | |
|
290h |
Off |
On |
On | |
| » |
2E0h |
On |
Off |
On |
|
2F0h |
Off |
Off |
On | |
|
300h |
On |
On |
Off | |
|
350h |
Off |
On |
Off | |
|
380h |
On |
Off |
Off | |
|
3E0h |
Off |
Off |
Off | |
|
DIAGNOSTIC LED(S) | |||
|
LED |
Color |
Status |
Condition |
|
LED1 |
Red |
Off |
Power is not on |
|
LED1 |
Red |
Blinking |
Network error |
|
LED1 |
Red |
On |
Power is on |
|
LED2 |
Green |
Off |
Data is not being transmitted/received |
|
LED2 |
Green |
On |
Data is being transmitted/received |