Matthew Jacob <mja...@feral.com> wrote:
>This almost always happens for tulip chips && and alpha platforms and Matt
>Thomas' de driver.
...
>> > :de0: abnormal interrupt: transmit underflow (raising TX threshold to 
>> > 96|256)
>> > :de1: abnormal interrupt: transmit underflow (raising TX threshold to 
>> > 96|256)

It also occurs under Digital UNIX:
 vmunix: tu0: transmit FIFO underflow: threshold raised to: 512 bytes
 vmunix: tu1: transmit FIFO underflow: threshold raised to: 512 bytes

I suspect it's poor design of either the cards or bus.  (I've
previously queried DEC on why some SCSI cards were placed in
particular locations, and received the following answer: "We place the
SCSI cards as tested. We know that some cards don't work as well in
all slots so we supply the tested version.")

Peter


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