Subject: Re: DEC 21x4x ethernet driver in 100baseTX mode
To: Andreas Wrede <>
From: Matt Thomas <>
List: current-users
Date: 10/03/1997 05:32:19
At 11:07 PM 10/2/97 -0400, Andreas Wrede wrote:
>I also see these abnormal interrupt messages on a "de1: DEC 21040 [10Mb/s]
>pass 2.3" in normal 10Mb mode.
>de1: abnormal interrupt: transmit underflow

On what type of system? That messages means the tulip chip is incapable
of dma'ing fast enough (1.25MB/s!) to keep the transmit FIFO not empty.
Is there other PCI traffic or slow ISA cards?
Matt Thomas               Internet:
3am Software Foundry      WWW URL:
Nashua, NH                Disclaimer: I disavow all knowledge of this message