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- Newsgroups: comp.sys.amiga.networking
- Message-ID: <36884050@arkon.dontpanic.sub.org>
- From: crest@arkon.dontpanic.sub.org (Klaus Burkert)
- Path: nordwest.pop.de!cosmos-l.gun.de
- Subject: Re: New ethernet card?
- Date: Tue, 19 Mar 1996 22:35:22 +0100
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- References: <4il54j$mue@vixen.cso.uiuc.edu>
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- In article <4il54j$mue@vixen.cso.uiuc.edu> <claevius@firefly.prairienet.org> wrote:
- > Another related question: Know of any Zorro-III ethernet cards? If I
-
- Not necessary.
-
- > remember correctly, both the Adriane and Commodore's A2065 (I think that's
- > the model number of CBM's own ethernet card, anyway...<?>) are Zorro-II
- > 16-bit cards, which would give them a bus bandwidth of about two and a half
- > meg per second. Typical ethernet connectivity will give you about nine or
- > ten meg per second, which is pretty close to what the bandwidth of the
-
- 10 M_BIT_/s, that's slightly abov 1M_BYTE_/s which ZorroII can handle
- without any problems.
- What you're talking about is Fast-Ethernet which is not that widespread
- and the number of Amigas connected to such a net is that small, that you'd
- sell perhaps 50 boards/year which does not make up for manufacturing and
- developing at all. Another issue is, that a lot of performance get's lost
- during the networking-layers (virtual volume -> envoy -> sana.device -> HW).
- As an imgae: two stock A3000 connected via Ariadne and Envoy, DiskSpeed
- on the other A3000's RAMDISK gives about 300 - 350 KB/s. When you equip
- both machines with WarpEngine40/40s, this goes up to well above 600KB/s.
- Under NetBSD we had well above 700KB/s throughput with Ariadne...
- So what would be the point in having 100MBit/s networking on the hardware
- level when the software limits it to below 1 MB/s?
-
- Ciao, Klaus.
-