Date   : Fri, 12 Oct 1984 22:41:00 EDT
From   : "Robert L. Krawitz" <ZZZ.RLK%MIT-OZ@MIT-MC.ARPA>
Subject: [TK.FONER: Obscure microprocessor chip needed]

Date: Wednesday, 10 October 1984  05:13-EDT
From: Leonard N. Foner <TK.FONER>
Reply-To: Foner at MIT-MC
To:   info-micro at BRL-VGR.ARPA, *BBoard at MIT-MC
cc:   Foner
Re:   Obscure microprocessor chip needed

This is quite a bit off the beaten track, but I thought I'd give it a
try.  If there are any UUCP lists which might address the issue (a
net.electronics, maybe?  or maybe even net.general?  I can't reach
UUCPland from here) I'd appreciate someone forwarding this there
(once, please).

I am in need of a rather obscure microprocessor/IO controller for an
Aiwa M800 cassette deck.  The processor controls the autobias adjust
for the deck.  Mine apparently crapped out, and Aiwa says they
discontinued the tape deck in April---hence they won't sell me a new
microprocessor.

I'd be willing to pay some reasonable amount for the right part, or
even for a similar deck that for some other reason doesn't work and is
about to be scrapped.  I'd aldo be more than willing to shower heaps
of thanks and praise for anyone who can direct me to a place I can get
this part.

Okay, 'nuff of that.  The part itself is specified as Aiwa part number
82-155-616-01, a "uCOM43-546C155".  It's got 42 (yep, 42) pins on it.

It's quite probable that this thing is an I/O controller with a
mask-programmed ROM in it.  This makes a close substitute, of course,
very much at issue.

If anyone knows how to find such an obscure part, or (heaven forbid)
has an old deck they don't want for some reason which has a working
one, I'd be very grateful indeed.

To reply to me, send to FONER at MIT-MC if you're on the ARPAnet.
UUCP users who can't hit the ARPAnet can reply directly if they know
some working route to mitccc or mit-charon.  (My username is simply
"foner" on both of those machines.)  Please, if you reply also to the
list, include me as a separate recipient so I'll be sure to see the
message in my mailbox.  If all these methods fail, but you're pretty
sure you've got the right part, you can call me collect at
617/577-1510 anytime, or send SnailMail to Leonard Foner, 4 Ames St,
Cambridge, MA 02139 USA.

Thanx much!

                                               <LNF>