4.3 Jumper Settings

All jumper settings discussed in the following sections are illustrated as seen from the component side with the VMEbus connectors downwards. The next table gives a summary of the default jumper and switch settings and their function.

Jumper Setting
Description	Jumper Block	Default Setting	Status	Section
Network Time Out	JB1	Not Connected	Max. 4 miles	4.3.1
Cable Ground	JB2	1-2 Connected	VMEbus GND	4.3.2
IRQ Level	JB3	5-6 Connected	Level 3	4.3.3
Access Mode	JB4	Not Connected	Both sup. and n.p.	4.3.4
Addressing Mode	JB5	2-3 Connected	Short addressing	4.3.4
Coax Termination	JB6	Not Connected	High Impedance	4.3.5
Node ID	SW1	Switch 5 ON, rest OFF	Node ID $10	4.3.6
Address (A15-A12)	SW2	'D'	Address $D000	4.3.4
Address (A19-A16)	SW3	'F'	Don't care	4.3.4
Address (A23-A20)	SW4	'F'	Don't Care	4.3.4

4.3.1 - Network Time Out Selection
4.3.2 - Cable Ground Decoupling
4.3.3 - VMEbus Interrupt Level
4.3.4 - VMEbus Address Selection
4.3.5 - ARCNET Coax Termination
4.3.6 - Node ID Switch SW1

CC121 - ARCNET Interface for VMEbus - 30 SEP 1996

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