Compcontrol, Inc.

CC121

ARCNET Interface for VMEbus

The CC121 ARCNET interface is a VMEbus module that allows you to interface VMEbus systems to ARCNET token-passing networks. The board, which is based on the SMC COM9026 ARCNET controller, includes a 2-kbyte high-speed dual-ported RAM data buffer. It operates as a VMEbus slave module with 8-bit access to the controller chip and onboard registers, and 8- or 16-bit access to the data buffer. A separate control register allows the user to mask interrupts from the controller, or reset the board. Another register allows the user to read the ARCNET node ID at any time.

The features of the CC121 module include:

VMEbus Interface

Double Eurocard form factor

7-level interrupt requester with software programmable vector

Register to mask interrupts or reset ARCNET controller

2-kbyte fast dual ported RAM for data packets

Occupies 4 kbyte of memory in the short or standard address space

Supervisory mode only, or both supervisory and non-privileged access modes can be selected

Local Area Network

ARCNET interface for coax, twisted-pair, or fiber optic

Uses SMC COM9026 protocol controller

Selectable high-, or low-impedance coax interface

Onboard register to read node ID

For more information about the CC121, please contact info@compcontrol.com.

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