Re: QLCC urq questions

[Robert Houk - WorkGroup Server Firmware <Robert.Houk@East.Sun.COM>]

   > It's all done through that one magic chip that no one has been able
   > to get any documentation for. Hitachi is less than forthcoming with
   > information about it, other that it's obsolete and they show no
   > "replacement" part number, and would I please go away and quit bothering
   > them.

   One magic chip?  What chip would that be?  I don't actually have an
   urquattro ECU to look at, so I'm going completely on your annotated
   code and my HC11 databook. 

It's the HD46506 QFP chip mounted on the daughter card immediately below
the CPU and EPROM locations.

   Was the "magic" chip a custom ASIC, or a more generic chip that might
   be in some [very] old data books?

No idea; I looked through what *I* could find, but never found a 46506
(I did find a 4650x, for some small "x", some multi-function controller
chip for auto applications, but it wasn't the same thing). I find it
hard to believe that Audi's MAC02 marketplace warranted a custom ASIC,
especially at 1980 prices. (On the other hand, the price Audi wants for
the MAC02...)

If you can find it, we'd *ALL* love to see the info!

					-RDH

P.S.	I'm CC'ing the QList in case there's some other newbie (*) 
	ComQuat (Computer Quattro...) Geeks out there who want to
	accept the challenge of scoring info on the HD46506


(*)	newbie: in the last coupla years, since last this topic
	and yrs trly came up together on the QList