STANDARD MICROSYSTEMS CORPORATION
ARCNET PC220
|
NIC Type |
ARCnet |
|
Network Transfer Rate |
2.5Mbps |
|
Data Bus |
16-bit ISA |
|
Topology |
Linear Bus |
|
Wiring Type |
RG-62A/U 93ohm coaxial |
|
Boot ROM |
Available |
|
CONNECTIONS | |
|
Function |
Label |
|
RG-62A/U 93ohm coaxial port |
J1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
Factory configured - do not alter |
EXT |
Open | |
|
Boot ROM enabled |
ROM |
Closed | |
|
Boot ROM disabled |
ROM |
Open | |
|
Note: Jumper EXT is used to configure the network time-out settings, these two jumpers are normally left open, however for additional settings refer to the COM 9026 Data Sheet. | |||
|
NODE ADDRESS SELECTION | ||||||||
|
Setting |
S1/1 |
S1/2 |
S1/3 |
S1/4 |
S1/5 |
S1/6 |
S1/7 |
S1/8 |
|
1 |
Off |
On |
On |
On |
On |
On |
On |
On |
|
2 |
On |
Off |
On |
On |
On |
On |
On |
On |
|
3 |
Off |
Off |
On |
On |
On |
On |
On |
On |
|
4 |
On |
On |
Off |
On |
On |
On |
On |
On |
|
5 |
Off |
On |
Off |
On |
On |
On |
On |
On |
|
251 |
Off |
Off |
On |
Off |
Off |
Off |
Off |
Off |
|
252 |
On |
On |
Off |
Off |
Off |
Off |
Off |
Off |
|
253 |
Off |
On |
Off |
Off |
Off |
Off |
Off |
Off |
|
254 |
On |
Off |
Off |
Off |
Off |
Off |
Off |
Off |
|
255 |
Off |
Off |
Off |
Off |
Off |
Off |
Off |
Off |
|
Note: A total of 255 node address settings are available. The switches are a binary representation of the decimal memory addresses. SW1/8 is the Most Significant Bit and switch SW1/1 is the Least Significant Bit. The switches have the following decimal values: SW1/8=128, SW1/7=64, SW1/6=32, SW1/5=16, SW1/4=8, SW1/3=4, SW1/2=2, SW1/1=1. Turn off the switches and add the values of the switches to obtain the correct node address. | ||||||||
|
BASE I/O ADDRESS SELECTION | ||||||
|
Address |
S2/6 |
S2/5 |
S2/4 |
S2/3 |
S2/2 |
S2/1 |
|
0h |
On |
On |
On |
On |
On |
On |
|
10h |
On |
On |
On |
On |
On |
Off |
|
20h |
On |
On |
On |
On |
Off |
On |
|
30h |
On |
On |
On |
On |
Off |
Off |
|
40h |
On |
On |
On |
Off |
On |
On |
|
3B0h |
Off |
Off |
Off |
On |
Off |
Off |
|
3C0h |
Off |
Off |
Off |
Off |
On |
On |
|
3D0h |
Off |
Off |
Off |
Off |
On |
Off |
|
3E0h |
Off |
Off |
Off |
Off |
Off |
On |
|
3F0h |
Off |
Off |
Off |
Off |
Off |
Off |
|
Note: A total of 64 Base I/O address settings are available. The switches are a binary representation of the decimal memory addresses. SW2/1 is the Most Significant Bit and switch SW2/6 is the Least Significant Bit. The switches have the following decimal values: SW2/1=512, SW2/2=256, SW2/3=128, SW2/4=64, SW2/5=32, SW2/6=16. Turn off the switches and add the values of the switches to obtain the correct node address. | ||||||
|
INTERRUPT SELECTION | |||||
|
IRQ |
IRQ/A |
IRQ/B |
IRQ/C |
IRQ/D |
IRQ/E |
|
2/9 |
Closed |
Open |
Open |
Open |
Open |
|
3 |
Open |
Closed |
Open |
Open |
Open |
|
4 |
Open |
Open |
Closed |
Open |
Open |
|
5 |
Open |
Open |
Open |
Closed |
Open |
|
7 |
Open |
Open |
Open |
Open |
Closed |
|
BASE MEMORY ADDRESS SELECTION | ||||||||
|
Address |
SW3/1 |
SW3/2 |
SW3/3 |
SW3/4 |
SW3/5 |
SW3/6 |
SW3/7 |
SW3/8 |
|
000h |
On |
On |
On |
On |
On |
On |
On |
On |
|
800h |
On |
On |
On |
On |
On |
On |
On |
Off |
|
1000h |
On |
On |
On |
On |
On |
On |
Off |
On |
|
1800h |
On |
On |
On |
On |
On |
On |
Off |
Off |
|
4000h |
On |
On |
On |
On |
On |
Off |
On |
On |
|
4800h |
On |
On |
On |
On |
On |
Off |
On |
Off |
|
5000h |
On |
On |
On |
On |
On |
Off |
Off |
On |
|
5800h |
On |
On |
On |
On |
On |
Off |
Off |
Off |
|
8000h |
On |
On |
On |
On |
Off |
On |
On |
On |
|
8800h |
On |
On |
On |
On |
Off |
On |
On |
Off |
|
9000h |
On |
On |
On |
On |
Off |
On |
Off |
On |
|
9800h |
On |
On |
On |
On |
Off |
On |
Off |
Off |
|
C000h |
On |
On |
On |
On |
Off |
Off |
On |
On |
|
C800h |
On |
On |
On |
On |
Off |
Off |
On |
Off |
|
D000h |
On |
On |
On |
On |
Off |
Off |
Off |
On |
|
D800h |
On |
On |
On |
On |
Off |
Off |
Off |
Off |
|
F0000h |
Off |
Off |
Off |
Off |
On |
On |
On |
On |
|
F0800h |
Off |
Off |
Off |
Off |
On |
On |
On |
Off |
|
F1000h |
Off |
Off |
Off |
Off |
On |
On |
Off |
On |
|
F1800h |
Off |
Off |
Off |
Off |
On |
On |
Off |
Off |
|
F4000h |
Off |
Off |
Off |
Off |
On |
Off |
On |
On |
|
F4800h |
Off |
Off |
Off |
Off |
On |
Off |
On |
Off |
|
F5000h |
Off |
Off |
Off |
Off |
On |
Off |
Off |
On |
|
F5800h |
Off |
Off |
Off |
Off |
On |
Off |
Off |
Off |
|
F8000h |
Off |
Off |
Off |
Off |
Off |
On |
On |
On |
|
F8800h |
Off |
Off |
Off |
Off |
Off |
On |
On |
Off |
|
F9000h |
Off |
Off |
Off |
Off |
Off |
On |
Off |
On |
|
F9800h |
Off |
Off |
Off |
Off |
Off |
On |
Off |
Off |
|
FC000h |
Off |
Off |
Off |
Off |
Off |
Off |
On |
On |
|
FC800h |
Off |
Off |
Off |
Off |
Off |
Off |
On |
Off |
|
FD000h |
Off |
Off |
Off |
Off |
Off |
Off |
Off |
On |
|
FD800h |
Off |
Off |
Off |
Off |
Off |
Off |
Off |
Off |
|
Note: The above table includes only a few of the many memory address settings available. The switches are a binary representation of the decimal memory addresses. SW3/1 is the Most Significant Bit and switch SW3/8 is the Least Significant Bit. The switches have the following decimal values: SW3/8=2048, SW3/7=4096, SW3/6=16384, SW3/5=32768, SW3/4=65536, SW3/3=131072, SW3/2=262144, SW3/1=524288. Turn off the switches and add the values of the switches to obtain the correct address.Notice that there is no switch representation for 8192 decimal. This means that 02000h, 03000h, 06000h, 07000h, 0A000h, 0B000h and 0E000h cannot be represented. Omissions in the above table reflect this. | ||||||||