TC6844 ARC CARD/SE30 Network Card Settings and Configuration

THOMAS-CONRAD CORPORATION

TC6844 ARC CARD/SE30

NIC Type
ArcNet
Chip Set
NCR 90C26
Data Bus
Mac SE/30
Network Transfer Rate
2.5Mbps
Topology
Linear Bus
Wiring Type
RG-62A/U 93ohm coaxial
Boot ROM
Not available

CONNECTIONS
Function
Label
Function
Label
Header to connector card
J1A
RG-62A/U 93ohm coaxial connector
J2
Header to main board
J1B

EXTENDED RANGE CONFIGURATION
Response Time
Recon Time
JP1
JP2
74.7 uS
840 mS
Open
Open
283.4 uS
1.68 S
Closed
Open
561.8 uS
1.68 S
Open
Closed
1.1186 mS
1.68 S
Closed
Closed
Note:This setting should only be changed when the length of the ArcNet segments exceed 6000 meters.

NODE ADDRESS
Setting
SW1/1
SW1/2
SW1/3
SW1/4
SW1/5
SW1/6
SW1/7
SW1/8
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
249
Off
On
On
Off
Off
Off
Off
Off
250
On
Off
On
Off
Off
Off
Off
Off
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
Note: A total of 253 node address settings are available. The switches are a binary representation of the decimal node 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 that are off to obtain the correct node address. (Off=1, On=0)
Addresses 0, 254, and 255 are reserved and should not be used.

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TC6844 ARC CARD/SE30 Network Card Settings and Configuration

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NIC Type	ArcNet
Chip Set	NCR 90C26
Data Bus	Mac SE/30
Network Transfer Rate	2.5Mbps
Topology	Linear Bus
Wiring Type	RG-62A/U 93ohm coaxial
Boot ROM	Not available

CONNECTIONS
Function	Label	Function	Label
Header to connector card	J1A	RG-62A/U 93ohm coaxial connector	J2
Header to main board	J1B

EXTENDED RANGE CONFIGURATION
Response Time	Recon Time	JP1	JP2
74.7 uS	840 mS	Open	Open
283.4 uS	1.68 S	Closed	Open
561.8 uS	1.68 S	Open	Closed
1.1186 mS	1.68 S	Closed	Closed
Note:This setting should only be changed when the length of the ArcNet segments exceed 6000 meters.

NODE ADDRESS
Setting	SW1/1	SW1/2	SW1/3	SW1/4	SW1/5	SW1/6	SW1/7	SW1/8
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
249	Off	On	On	Off	Off	Off	Off	Off
250	On	Off	On	Off	Off	Off	Off	Off
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
Note: A total of 253 node address settings are available. The switches are a binary representation of the decimal node 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 that are off to obtain the correct node address. (Off=1, On=0) Addresses 0, 254, and 255 are reserved and should not be used.