3094

3094 is the Ethernet II controller.

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Introduction

It is an ethernet interface for ND-100 machines. The controller conforms to IEEE 802.3 and ISO/DIS 8802/3 standards. ND-100 based systems can drive a maximum of four Ethernet II controllers. The Ethernet controller implements the three lower layers of the OSI seven layer model (OSI model) for system communication.

Switches and indicators

Indicators on the card, from the top of the card

• "8" - yellow LED - external 12V transceiver
• "2" - red LED - 68000 halt
• "1" - red LED - 68000 reset
• "3" - yellow LED - active memory cycle
• "5" - red LED - memory parity error

Thumbwheel switches, from top of the card

• 12J - Ethernet number, An ND-100 can control four Ethernet controllers. The device address of a controller in the system is set by this switch. Position of the switch as follows:
  • 0 - ethernet number 1 - device number 140360 (octal) - ident code 140034 (octal)
  • 1 - ethernet number 2 - device number 140364 (octal) - ident code 140035 (octal)
  • 2 - ethernet number 3 - device number 140370 (octal) - ident code 140036 (octal)
  • 3 - ethernet number 3 - device number 140374 (octal) - ident code 140037 (octal)
• 9J - memory bank number
• 7J - memory bank number

These thumbwheels selects the memory bank accessible to the controller, as follows:

• • 7J: 0, 9J: 0-3, bank number: 0, PIOC address space: 0 - 512 Kbytes, physical page: 0 - FF (hex)
  • 7J: 0, 9J: 4-7, bank number: 4, PIOC address space: 512 - 1024 Kbytes, physical page: 100 - 1FF (hex)
  • 7J: 0, 9J: 8-11, bank number: 8, PIOC address space: 1024 - 1536 Kbytes, physical page: 200 - 2FF (hex)
  • 7J: 0, 9J: 12-15, bank number: 12, PIOC address space: 1536 - 2048 Kbytes, physical page: 300 - 3FF (hex)
  • 7J: 1, 9J: 0, bank number: 16, PIOC address space: 2048 - 2560 Kbytes, physical page: 400 - 4FF (hex)

etc.

Connectors

The A and B connectors are used for I/O, the C connector is used for the ND-100 Bus.

I/O Devices on the card

none?

Installation

Hardware needed

• The 3094 controller card
• Ethernet/GPIB plug panel
• internal cable between controller and plug panel
• an ethernet transceiver

ethernet transceiver

The transceiver is powered by the ND-100's 12 V DC power supply via the Ethernet controller. A current switch will disconnect the power to the transceiver in case of

• short circuit or excessive transceiver current consumption
• low 5 Volt supply
• a power off command from the controller. A power-off command is issued:
  • after jabber (data transmitted to jam the network)
  • as a result of a hanging transmitter
  • if the heartbeat is missing

Reference

Norsk Data Document ND–12.055.01 Ethernet II Controller