ARCNET LanCard AT TP

TIARA COMPUTER SYSTEMS, INC.

NIC Type	ARCnet
Transfer Rate	2.5Mbps
Data Bus	16-bit ISA
Topology	Star
Wiring Type	Shielded twisted pair Unshielded twisted pair
Boot ROM	Available

NODE ADDRESS - SW4
Node	SW4/1	SW4/2	SW4/3	SW4/4	SW4/5	SW4/6	SW4/7	SW4/8
0	-	-	-	-	-	-	-	-
1	Off	Off	Off	Off	Off	Off	Off	On
2	Off	Off	Off	Off	Off	Off	On	Off
3	Off	Off	Off	Off	Off	Off	On	On
4	Off	Off	Off	Off	Off	On	Off	Off
251	On	On	On	On	On	Off	On	On
252	On	On	On	On	On	On	Off	Off
253	On	On	On	On	On	On	Off	On
254	On	On	On	On	On	On	On	Off
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 8 is the Least Significant Bit and switch 1 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)

INTERRUPT REQUEST

IRQ

JP1

JP2

JP3

JP4

JP5

JP6

JP7

JP8

JP9

JP10

JP11

Open

Closed

Open

Closed

Open

Closed

Open

Closed

Open

Closed

Open

Closed

Open

Closed

Open

Closed

Open

Closed

Open

Closed

Open

Closed

Open

DIAGNOSTIC CONFIGURATION
Setting		JP12
»	Enhanced diagnostics disabled	Pins 1 & 2 Closed
	Enhanced diagnostics enabled	Pins 2 & 3 Closed
Note:The enhanced diagnostics are compatable only with the dirver that was shipped with this card. When the diagnostics are enabled, features such as an ARCnet duplicate Node ID search, are activated.

INTERNAL NETWORK TERMINATION
Setting		JP13
»	Internal network termination disabled	Pins 2 & 3 Closed
	Internal network termination enabled	Pins 1 & 2 Closed
Note:A terminator plug need not be used if this option is enabled and the card is located at the start or end point of the network cable.

RIM BUFFER ADDRESS CONFIGURATION
Buffer Address	SW1/2	SW1/3	SW1/4	SW1/5	SW1/6	SW1/7	SW1/8
xC0OOh	Off	On	On	Off	Off	Off	Off
xC4OOh	Off	On	On	Off	Off	Off	On
xCCOOh	Off	On	On	Off	Off	On	On
xD0OOh	Off	On	On	Off	On	Off	Off
xD4OOh	Off	On	On	Off	On	Off	On
xD8OOh	Off	On	On	Off	On	On	Off
xDCOOh	Off	On	On	Off	On	On	On
xE000h	Off	On	On	On	Off	Off	Off
Notes: Place one digit from the following table in front of the address given above to get the complete Address. SW3/switch 4 should be set to On for 128KB, or Off for 16KB.

RIM BUFFER EXTENDED ADDRESS CONFIGURATION
Segment		SW3/1	SW3/2	SW3/3	SW3/5	SW3/6	SW3/7	SW3/8
»	0xxxx	On	Off	Off	Off	Off	Off	Off
	1xxxx	On	Off	Off	Off	Off	Off	On
	2xxxx	On	Off	Off	Off	Off	On	Off
	3xxxx	On	Off	Off	Off	Off	On	On
	4xxxx	On	Off	Off	Off	On	Off	Off
	5xxxx	On	Off	Off	Off	On	Off	On
	6xxxx	On	Off	Off	Off	On	On	Off
	7xxxx	On	Off	Off	Off	On	On	On
	8xxxx	On	Off	Off	On	Off	Off	Off
	9xxxx	On	Off	Off	On	Off	Off	On
	Axxxx	On	Off	Off	On	Off	On	Off
	Bxxxx	On	Off	Off	On	Off	On	On
	Cxxxx	On	Off	Off	On	On	Off	Off
	Dxxxx	On	Off	Off	On	On	Off	On
	Exxxx	On	Off	Off	On	On	On	Off
	Fxxxx	On	Off	Off	On	On	On	On
Note:Place the digit found in this table in front of the address given in the previous table to get the complete RIM buffer address. A setting other than zero in this table will place the buffer into extended memory at the aforementioned address. For example, a setting of 2 will place the buffer into the 2nd megabyte of extended memory, a setting of C will place the buffer into the 12th megabyte of extended memory. Starting from the base address. make sure that the next 16 to 128KB of memory (see above notes) are not used. Important: The software drivers supplied with this card do not support extended memory.

EXTENDED TIMEOUT CONFIGURATION
Distance		Response Time	Reconfiguration	SW2/1	SW2/2
»	4.8 miles	74.7µs	840ms	On	On
	21.0 miles	283.4µs	1680ms	On	Off
	42.5 miles	561.8µs	1680ms	Off	On
	85.6 miles	1118.6µs	1680ms	Off	Off
Note:The distance given is the maximum distance between the two furthest nodes on the network.