Commodore Networking and Communications Cards
Most of Commodore's networking hardware was made for the Amiga at the start of the 1990s, though there were earlier efforts for the 8-bit machines too.
In 1990 Commodore released two network cards for the Zorro II slots of the Amiga 2000, 3000 and 4000. The A2060 connects to ARCNET, a network popular in offices at the time. It is rated at 2.5 Mbit/s, although real-world throughput was far lower, and it uses RG62 coaxial cable with 93-ohm terminators rather than Ethernet cabling. Its design came from Ameristar. The A560 of 1989 brought ARCNET to the Amiga 500 through its side expansion port. The A2065 is a 10 Mbit/s Ethernet card built around the AMD Am7990 controller with a 32 KB shared buffer, offering both thin-coax BNC and AUI connections but not twisted-pair. With SANA-II drivers it works with the Amiga's networking software, and it is also supported by Linux, NetBSD and OpenBSD.
The A2232, also from 1990, is a seven-port serial card with its own on-board processor, letting a single Amiga drive several modems or terminals at once.
For the 8-bit machines, the MBS 100 and MBS 150 formed a simple multi-user system for sharing printers and drives over the IEEE-488 bus, and an MBS version existed for the Commodore 64. The VIC-Switch, made for Commodore by the Swedish firm Handic, was a multiplexer that let several computers share devices on the serial bus.
These boards are fairly uncommon today. Collectors look for complete cards with their original drivers and, for ARCNET, the proper cable and terminators.