Intel B57684 EPROM

[Buchholz, Steven]

Well, I opened up the Motronic box from my beemer today.  As others had
mentioned from my prior post the PROM is indeed socketed ... and has a
nifty clip to ensure that it stays seated in the socket.  The EPROM
device has an Intel logo on it and a device type of B57684.  I'm without
my nerd novels here at home and was wondering if any of you happen to
have a databook that describes this device.  It is a 28 pin, 0.6"
spacing package.  I suspect it is similar to a 27128 or 27256, but I'd
rather know than guess when I try to read it in.  

Interestingly enough, the CPU in this box says that it is a Siemens
B57656, but it also has "Intel" stamped on it.  Does anyone know
anything about this CPU as well?

TIA!
Steve Buchholz
San Jose, CA (USA)
'92 BMW k1 (K1DRBAR)
but when I cage, I quattro ...