TOP/ARC-20 COAX BUS Network Card Settings and Configuration
TOP MICROSYSTEMS, INC.
TOP/ARC-20 COAX BUS
NIC Type | ARCnet |
Transfer Rate | 2.5Mbps |
Data Bus | 8-bit ISA |
Topology | Star Linear bus |
Wiring Type | RG62A/U 93ohm coaxial (two connectors) |
Boot ROM | Available |
NODE ADDRESS | ||||||||
Node | SW2/1 | SW2/2 | SW2/3 | SW2/4 | SW2/5 | SW2/6 | SW2/7 | SW2/8 |
0 | - | - | - | - | - | - | - | - |
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 |
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: 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 off the switches and add the values of the off switches to obtain the correct node address. (On=0, Off=1) | ||||||||
CABLE LENGTH AND RESPONSE/RECONFIGURATION TIMEOUTS | |||||
Cable Length | Response Time | Reconfiguration Time | JP1 | JP2 | |
» | < 20,000 feet | 74.7 m s | 840ms | Open | Open |
| > 20,000 feet | 283.4 m s | 1680ms | Closed | Open |
| > 20,000 feet | 561.8 m s | 1680ms | Open | Closed |
| > 20,000 feet | 1118.6 m s | 1680ms | Closed | Closed |
Note: All NICs on the network must have this option set the same. | |||||
BOOT ROM | ||
Setting | JP3 | |
» | Disabled | Open |
| Enabled | Closed |
Note: A 2732 or 2764 boot ROM may be used in the boot ROM socket. If a 2732 is used, the chip must be | ||
INTERRUPT REQUEST | ||||||
IRQ | JP4 | JP5 | JP6 | JP7 | JP8 | |
» | 2 | 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 |
I/O BASE ADDRESS | ||||
Address | SW1/1 | SW1/2 | SW1/3 | |
| 260-26Fh | On | On | On |
| 290-29Fh | On | On | Off |
» | 2E0-2EFh | On | Off | On |
| 2F0-2FFh | On | Off | Off |
| 300-30Fh | Off | On | On |
| 350-35Fh | Off | On | Off |
| 380-38Fh | Off | Off | On |
| 3E0-3EFh | Off | Off | Off |
BASE MEMORY ADDRESS & BOOT ROM ADDRESS | |||||||
Base Address | Boot ROM | SW1/4 | SW1/5 | SW1/6 | SW1/7 | SW1/8 | |
| C0000h | C2000h | On | On | On | On | On |
| C0800h | C2000h | On | On | On | On | Off |
| C1000h | C2000h | On | On | On | Off | On |
| C1800h | C2000h | On | On | On | Off | Off |
| C4000h | C6000h | On | On | Off | On | On |
| C4800h | C6000h | On | On | Off | On | Off |
| C5000h | C6000h | On | On | Off | Off | On |
| C5800h | C6000h | On | On | Off | Off | Off |
| CC000h | CE000h | On | Off | On | On | On |
| CC800h | CE000h | On | Off | On | On | Off |
| CD000h | CE000h | On | Off | On | Off | On |
| CD800h | CE000h | On | Off | On | Off | Off |
» | D0000h | D2000h | On | Off | Off | On | On |
| D0800h | D2000h | On | Off | Off | On | Off |
| D1000h | D2000h | On | Off | Off | Off | On |
| D1800h | D2000h | On | Off | Off | Off | Off |
| D4000h | D6000h | Off | On | On | On | On |
| D4800h | D6000h | Off | On | On | On | Off |
| D5000h | D6000h | Off | On | On | Off | On |
| D5800h | D6000h | Off | On | On | Off | Off |
| D8000h | DA000h | Off | On | Off | On | On |
| D8800h | DA000h | Off | On | Off | On | Off |
| D9000h | DA000h | Off | On | Off | Off | On |
| D9800h | DA000h | Off | On | Off | Off | Off |
| DC000h | DE000h | Off | Off | On | On | On |
| DC800h | DE000h | Off | Off | On | On | Off |
| DD000h | DE000h | Off | Off | On | Off | On |
| DD800h | DE000h | Off | Off | On | Off | Off |
| E0000h | E2000h | Off | Off | Off | On | On |
| E0800h | E2000h | Off | Off | Off | On | Off |
| E1000h | E2000h | Off | Off | Off | Off | On |
| E1800h | E2000h | Off | Off | Off | Off | Off |
MISCELLANEOUS NOTES |
This card may be used in a star topology by terminating one of the BNC connectors. |
My Books
