This article is from the Amiga Networking FAQ, by Richard Norman with numerous contributions by others.
A2065 by Commodore Business Machines
The A2065 is no longer in production, but is listed here for historical purposes in case you find one used. It is unknown what Amiga Technologies plans to do with the A2065 and A225 software.
Function: Full ANSI 802.3 type Ethernet protocols over either Type A (Thick Ethernet) or Type B (Thin Ethernet/Cheapernet) connections. The 32K onboard RAM Buffer provides shared RAM between Am7990 processor and the Amiga.
Card Type: Amiga bus (100 pin), Autoconfig Interface Specs: 15 pin female "D" connector for Type A (Thick Ethernet) networking with 100 nodes per segment Female BNC coax connector for Type B (Thin Ethernet/Cheapernet) networking with 30 nodes per segment.
Speed: 10Mbps CSMA/CD interface DMA data reading and writing to shared RAM Card Size: Full size Amiga board
 
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