A2060 von Commodore fuer alle Zorro-Amigas
Endlich Netzwerk, Internet, etc. fuer den Amiga.
Ich verkaufe hier eine A2060 Arcnet-Karte, die bis vor ein paar Tagen in meinem Amiga 2000 ohne Probleme lief. Die Karte ist getestet und funktioniert einwandfrei. Endlich stressfrei mit dem Amiga ins Internet oder ins heimische LAN einsteigen und so bequem Daten austauschen, Internetbrowsen (ohne Angst vor Viren, Wuermern, Trojanern und Co.) und auch mit dem Amiga wieder am gesellschaftlichen Leben teilzuhaben.
Die Karte kann an jedem handelsueblichen Arcnet-Verteiler angeschlossen werden. Die Karte wird nicht nur von SANA-II unterstuetzt, sondern auch von NetBSD und OpenBSD.
Die Karte funktioniert in allen Zorro-Amigas (A2000, A2500, A2500UX, A3000D, A3000UX, A3000T, A4000D, A4000T und mit entsprechenden Zorroboards auch im A500, A1000 und A1200) und laeuft absolut problemlos.
For international bidders:
I do ship worldwide. If you have any questions, just send me a message.
You are bidding on a Commodore A2060 networking card (NIC) for Zorro Amigas. The card is fully tested and working.
Some detailed pictures:
Ein Auszug aus dem Big Book of Amiga Hardware:
Type ARCnet (Attached Resource Computer NETwork)
Coax & BNC: Yes
UTP & RJ45: No
SANA-II Driver: Yes
MNI Driver: No
Other Driver: Yes (AS255r TCP/IP stack has built-in support)
The A2060 is a full length Zorro-II network card. The A2060 is NOT an Ethernet card, it uses a different networking standard called ARCnet. Arcnet was a popular network standard during the 1980's but has been pretty much killed off by Ethernet, except for industrial and embedded applications where it's more robust than ethernet and ARCnet is a token ring (not to be confused with IBM's Token Ring) networking standard which can be arranged in a bus topology or a star topology in both Coaxial Cabling and UTP. Whilst the cabling may be very similar to Ethernet cabling, it is different electrically. ArcNet requires RG62/93 Ohm and NOT RG58/50 Ohm which ethernet uses. It is also available in a range of speeds from 150Kb/s to 10Mb/s. The A2060 is capable of transferring at about 150K/sec and uses 2.5Mbit ARCnet. The A2060 has several common bugs. Firstly, the "hybrid" chip that forms the electronic interface to the ARCnet network comes in two different versions: HYC 9058 (for bus networks) and HYC 9068 (for star networks). As the A2060 manual describes it, the board is for a bus network, but many A2060s come with the 9068 (star) hybrid installed. A bus network needs 93-ohm terminators at each end, and this works fine with the 9058 (bus) version of the hybrid. With the 9068, however, the hybrid itself performs the termination. To connect two machines with 9068 hybrids, run coax from one machine to the other, without using terminators. Using T-connectors to attach more machines in the middle of the bus may or may not work, due to each one adding its termination to the bus. To connect a 9068-version A2060 to a bus network of 9058-version A2060s, place it at the end of the chain and connect the cable directly, without a terminator (this may limit the network to only being operational when the 9068-equipped machine is on). Both versions of the card should have no problems when attached directly to an active hub. It is also possible to replace the HYC 9068 hybrid with the 9058 version, provided you can locate one. There are also several well-known problems with version 37.2 of the "a2060.device" driver software. Replacements for this driver are available in the comm/net directory of Aminet. Some commercial networking packages like Envoy 2.0 also include much better replacement drivers. If the A2060 does not perform reliably even with updated driver software, check the board for cold solder joints on hand-soldered components like the BNC coax connector and DIP switches. Some or all of these components may need to have overly-long leads trimmed to prevent interference with adjacent cards or connectors. Finally, the Arcnet address switches on the back of the board are labelled incorrectly in the manual (or on the board, depending on how you look at it). At least some A2060's have a sticker stuck onto the DIP switch, which may disagree with both other references. Ignore all of these: the correct layout is described in the Switches section below. (Assign Arcnet ID numbers starting with 254 and decreasing from there. This will provide a slight performance increase due to Arcnet's token-passing setup.)
Jumpers
LED: Access LED. Attach a hard disk access LED here to see activity on
the Arcnet bus. The left pin of the connector is positive, and the
board provides a current-limiting resistor.
Switches
Arcnet Node ID: This switch is used to set the Arcnet address of the
board (refer to the board diagram above). Bit 0 is the switch farthest
from the BNC connector; bit 7 is the closest to the BNC connector.
Switch settings:
1: Down (toward the solder side of the board)
0: Up (toward the component side of the board)
Note: Zero is reserved, and not a valid Arcnet address.
Example Arcnet Node Address Settings
ID Binary Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
----- -------- ---- ---- ---- ---- ---- ---- ---- ----
254 11111110 down down down down down down down up
253 11111101 down down down down down down up down
252 11111100 down down down down down down up up
128 10000000 down up up up up up up up
3 00000011 up up up up up up down down
2 00000010 up up up up up up down up
1 00000001 up up up up up up up down
und ein Auszug aus der Amiga Hardware Database:
Company Commodore, USA
Date 1990
Amiga A2000, A3000, A4000
Interface Zorro II
Autoconfig ID 514 / 8,9
Arcnet interface
developed from the Ameristar Arcnet Controller
Arcnet networking system - old, slow but cheap and reliable, useful for small LANs and simple network sharing
Arcnet requires RG62 coaxial cable instead of the RG58 used on Ethernet systems
uses 93 ohm terminators opposed to the 50 ohm used by Ethernet
the Arcnet interface hybrid chip comes in two different versions, HCY 9058 for bus networks and HCY 9068 for star networks
the manual says the card uses a bus network layout with up to 256 nodes but many A2060s has 9068 hybrids for a star network layout allowing only four cards to be connected together
to solve this the HCY 9068 can be simply replaced with a HCY 9058 chip
interrupt driven (polled I/O) - one interrupt on the Amiga yields into a busy system
to reduce traffic the driver uses the Arcnet hardware's four buffer as a single FIFO buffer
socket for optional network autoboot ROM
bus activity LED connector
supported by NetBSD and OpenBSD
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