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LanCard/A FO

TIARA COMPUTER SYSTEMS, INC.

LanCard/A FO

NIC Type

ARCnet

Transfer Rate

2.5Mbps

Data Bus

8-bit ISA

Topology

Linear Bus

Wiring Type

200Ás

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

On

On

On

On

On

Off

On

3

On

On

On

On

On

On

Off

Off

4

On

On

On

On

On

Off

On

On

251

Off

Off

Off

Off

Off

On

Off

Off

252

Off

Off

Off

Off

Off

Off

On

On

253

Off

Off

Off

Off

Off

Off

On

Off

254

Off

Off

Off

Off

Off

Off

Off

On

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)

DIAGNOSTIC LED(S)

LED

Status

Condition

L1

On

Card is passing the token

L1

Blinking

Card is reconfiguring

L1

Off

Card is resetting or inoperative

I/O BASE ADDRESS

Address

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

2E0h

Off

On

Off

Off

Off

On

 

160h

On

Off

On

Off

Off

On

 

1E0h

On

Off

Off

Off

Off

On

 

260h

Off

On

On

Off

Off

On

 

360h

Off

Off

On

Off

Off

On

 

3E0h

Off

Off

Off

Off

Off

On

Note: Some examples of possible settings are shown. The switches are a binary representation of the hexadecimal I/O addresses. Switch 6 is the Least Significant Bit and switch 1 is the Most Significant Bit. The switches have the following decimal values: switch 6=1h, 5=2h, 4=4h, 3=8h, 2=10h, 1=20h. Turn off the switches, add the values of the off switches, and multiply the total by 10h to obtain the correct I/O address. (On=0, Off=1)

BOOT CONFIGURATION

Setting

SW2/9

SW2/10

Boot from network, ignore bootable floppy or hard drives

On

On

Try to boot from floppy drive A, then the network

On

Off

Try to boot from hard drive C, then the network

Off

Off

Try to boot from floppy drive A, then from hard drive C, then the network

Off

On

INTERRUPT REQUEST

IRQ

JP1

JP2

JP3

JP4

JP5

2

Open

Open

Open

Open

Closed

3

Open

Open

Open

Closed

Open

4

Open

Open

Closed

Open

Open

5

Open

Closed

Open

Open

Open

7

Closed

Open

Open

Open

Open

OPTIONAL 8253 TIMER INTERRUPT REQUEST

IRQ

JP6

JP7

JP8

JP9

JP10

JP11

JP12

JP13

JP14

JP15

2

Open

Open

Open

Open

Closed

Open

Open

Open

Open

Closed

3

Open

Open

Open

Closed

Open

Open

Open

Open

Closed

Open

4

Open

Open

Closed

Open

Open

Open

Open

Closed

Open

Open

5

Open

Closed

Open

Open

Open

Open

Closed

Open

Open

Open

7

Closed

Open

Open

Open

Open

Closed

Open

Open

Open

Open

RESPONSE/RECONFIGURATION TIMEOUTS

Response Time

Reconfiguration Time

JP16

JP17

74.7Ás

840Ás

Open

Open

 

283.4Ás

1680Ás

Open

Closed

 

561.8Ás

1680Ás

Closed

Open

 

1118.6Ás

1680Ás

Closed

Closed

Note: All NICs on the network must have this option set the same.

RIM BUFFER, BOOT ROM, AND EXPANSION RAM ADDRESS CONFIGURATION

Address

SW1/7

SW1/8

SW1/9

SW1/10

Cxxxxh

On

On

Off

Off

Dxxxxh

On

On

Off

On

Exxxxh

On

On

On

On

Note:This table represents the first digit of three seperate addresses, the rim bufffer address, the boot ROM
x variables are configured for the three different addresses in the next three tables.

BOOT ROM ADDRESS CONFIGURATION

Address

JP18

JP19

JP20

x8000h

Open

Closed

Open

 

Disabled

Open

Open

Open

 

x4000h

Closed

Open

Open

 

xC000h

Open

Open

Closed

EXPANSION SRAM CONFIGURATION

Size

Address

JP21

W1

Disabled

Disabled

Open

N/A

 

2K x 8 (24pin)

x4000h

Closed

Pins 2 & 3 closed

 

8K x 8 (28pin)

x4000h

Closed

PIns 1 & 2 closed

Note:The manufacturer suggests the use of Hitatchi 6116 2K x 8 SRAM or Hitatchi 6264 8K x 8 SRAM chips. Most network software packages do not currently support the extra expansion memory.

RAM BUFFER ADDRESS CONFIGURATION

Address

JP22

JP23

x0000h

Open

Closed

 

x4000h

Closed

Open

Note: The RAM Buffer cannot be disabled.