Subject: Re: DEFZA PMAF-A support
To: Jason R Thorpe <>
From: Maciej W. Rozycki <>
List: port-pmax
Date: 07/02/2001 10:07:15
On Sun, 1 Jul 2001, Jason R Thorpe wrote:

>  > 	DEFZA PMAF-A/PMAF-C FDDIcontroller 700 interface Older FDDI interface 
>  > 	card prior to DEFTA.  There are variations of connectors; DAS, SAS, 
>  > 	Copper ThinWire and Shielded Twisted Pair (STP).  This may just be a 
>  > 	case of testing the card.  If it doesn't work, support should not be 
>  > 	too hard to add.
> Well, that paragraph lies :-)  The DEFZA is totally different from the

 Not totally -- the MAC chipsets used on both cards appear to be
compatible with each other. ;-)  At least the formats of the packet
request header are, and the header is visible to a driver.

 The paragraph appears to be completely bogus, indeed.  In particular,
there is no DAS version of the DEFZA and there is no PMAF-C (DEFZA-CA is
PMAF-A just like DEFZA-AA; I'm not sure if they are distinguishable from 
the driver's point of view at all). 

>  > so, i've got a PMAF-AA that i would like to get working in a 3MAX+ that i've 
>  > got here, and was wondering what would be required to get it to work.  anyone
>  > know what to do?  let me know what i should do to test this, or to get any
>  > information that you would need to you.
> Well, if you'd like to embark on writing a device driver for it, I can
> provide some advice.  I think I know where to get a datasheet for it, too.

 The guys at DEC appear to have lost it, if we are thinking of the same
doc... :-( Also I doubt it documents all the quirks the firmware has
(well, I have version 1.1 and that's quite old; they might have fixed them
later, but a sane driver must assume the worst anyway).

+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+        e-mail:, PGP key available        +