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A2065 Ethernet Local Area Network Board
The A2065 is an Ethernet card. It is the only ethernet card ever produced by CBM (the A2060 was an ARCNet one). It provides Thin Ethernet and Thick Ethernet connectors (in easier words, BNC and AUI). It lacks a UTP connetor, but this is not a major issue, because you can easily buy a cheap tranciever to connect to the AUI port in order to use UTP.
Please, have a look at the functional specification.
There are few config jumpers on the board you may need to change.
Jumper block JP1-JP6 sets the different possible interrupts with position JP2 being the second position in from the left.
Jumper JP7 controls the type of the Ethernet transceiver being used. For type 2 Ethernet, jumper JP7 must be off. If your site uses type 1 Ethernet, a jumper block must be placed on JP7. Most sites use type 2 Ethernet, so JP7 is left off; this is the default setting, preset from the factory.
Technical Specifications
| Ethernet Type | Thick Ethernet 10BASE5 | Thin Ethernet (Cheapernet) 10BASE" |
| Data rate | 10 Mbps | 10 Mbps |
| Segment length without repeaters | 500 meters | 185 meters |
| Network length without repeaters | 2500 meters | 925meters |
| Nodes per segment | 100 | 30 |
| Minimum node spacing | 2.5 meters | 0.5 meters |
| Cable/connector | 0.4 inch diameter 50 ohm double shielded N-series shielded connector rugged cable |
0.2 inch diameter 50 ohm RG-58 A/U type Single BNC connector flexible cable |
| Transceiver cable | 0.38 inch diameter multiway cable with 15 pin D connectors maximum length: 50 meters | not required |
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