Problem with Adaptec 4-port fast Ethernet in AlphaPC
Sat Sep 19 14:39:12 1998
On Sat, 19 Sep 1998 Jay.Estabrook@digital.com wrote:
> > The 21143 chip must be enabled by a write to the power control register in
> > PCI config space -- that migth be what you are seeing.
> Actually, I was seeing *3* registers having the WRITE problem (other didn't);
> and it was the de4x5.c driver that I was using at the time. The operations
> were all BYTE WRITEs, at offsets 0x0D, 0x43, and 0x3C, IIRC...
0x0D PCI latency timer, which must be rewritten if too low
0x43 The 21143 power-down register, which must be written to turn the
chip on (*only* on the 21143).
0x3C Interrupt line -- this register is often (almost always!) set wrong
by Intel machine's PCI-BIOSes. My driver ignores it on multiport
cards, but the de45x driver might overwrite it.
Donald Becker firstname.lastname@example.org
USRA-CESDIS, Center of Excellence in Space Data and Information Sciences.
Code 930.5, Goddard Space Flight Center, Greenbelt, MD. 20771