Unknown IC

From: ajp166 <ajp166_at_bellatlantic.net>
Date: Mon Oct 15 17:39:14 2001

It also appears in the LQ02 printer logic and the RX01 disk ucontroller.
It was a popular TTL 4bit ALU slice.


Allison
-----Original Message-----
From: Dave McGuire <mcguire_at_neurotica.com>
To: classiccmp_at_classiccmp.org <classiccmp_at_classiccmp.org>
Date: Monday, October 15, 2001 6:16 PM
Subject: Re: Unknown IC


>On October 15, Tony Duell wrote:
>> > > Ahh, the 74LS181s are ALUs, as is the 'F582. Interesting that
they
>> > >used both. I'm curious...what kind of processor is this?
>> >
>> > Am I the only one who finds it a bit perverse that there are 74xxx
standa=
>> > rd
>> > TTL circuits for such complex functions as ALUs? I thought that the
way t=
>>
>> Actually, what suprises me is how _simple_ the 74181 gate schematic is
>> (it's published in most TTL databooks). It doesn't take that long to
>> understand how it works.
>>
>> In terms of the transistor count, I suspect there are TTL chips which
are
>> more complex than the '181.
>
> The '181 is even used in the pdp11/04 and /34 if memory serves.
>Anyone know of any others?
>
> -Dave
>
>--
>Dave McGuire
>Laurel, MD
Received on Mon Oct 15 2001 - 17:39:14 BST