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- Newsgroups: comp.protocols.tcp-ip.ibmpc
- Path: sparky!uunet!cs.utexas.edu!torn!watserv1!sail.uwaterloo.ca!eengelke
- From: eengelke@sail.uwaterloo.ca (Erick Engelke)
- Subject: Re: Crynwr WD8003E-P
- Message-ID: <Bs7sJ8.xn@watserv1.uwaterloo.ca>
- Sender: news@watserv1.uwaterloo.ca
- Organization: University of Waterloo
- References: <712380314snx@exorcise.demon.co.uk> <712419634snx@crynwr.com>
- Date: Thu, 30 Jul 1992 18:25:54 GMT
- Lines: 48
-
- In article <712419634snx@crynwr.com> nelson@crynwr.com (Russell Nelson) writes:
- >In article <712380314snx@exorcise.demon.co.uk> james@exorcise.demon.co.uk writes:
- >
- >Sure, the wd8003e driver works for many people.
- >
- > I have tried the standard WD8003E driver without much success, although
- > it does appear to read the MAC address correctly. The WD docs mention
- > significant differences with the 83C690 chip and the old software is
- > not compatible.
- >
- >Ahhh, yes. You're one of the ones for whom the driver doesn't work.
- >SMC is concerned about this driver not working for some people, and
- >they sent me an Elite 16 to make it work. Well, on my three
- >machines, it does work. Hard to fix it if it isn't broken.
-
-
- The SMC driver we received with our NIC appeared to not block
- succesive send calls when an earlier call was in progress and
- caused the card to timeout and appear to only send one or two
- packets a second.
-
- To create this effect, you only need a program which can send
- out back-to-back packets, and the packet length is important too.
- Using the WATTCP FTP program on a 33 Mhz 386 appears sufficient.
-
- We were able to get the programs to work by inserting a timed
- delay loop between packets.
-
- So we worked backwards and created a small program to try
- blasting out packets with the ability to vary the packet length
- and the inter-send_call-delay and we were able to establish
- that the delay had to be increased when larger packets were
- sent. So it's not hard to establish the cause of the problems.
- or to reproduce them on demand.
-
- I've placed a copy of the test program on sunee.uwaterloo.ca in
- the file pub/wattcp/speed.exe though I think it now keeps packet
- size constant.
-
- speed.exe can also be used to test the performance of network cards,
- but it may not be healthy for other machines on the subnet.
-
- Erick
-
- --
- Erick Engelke Engineering Computing
- University of Waterloo
- Waterloo TCP Architect erick@development.watstar.uwaterloo.ca
-