Newsgroups: comp.robotics
Path: brunix!uunet!gatech!darwin.sura.net!convex!convex!hattori
From: hattori@convex.com (Mato Hattori)
Subject: Looking for 82C55A2 & 27C256-100ns
Sender: usenet@news.eng.convex.com (news access account)
Message-ID: <hattori.716764500@convex.convex.com>
Date: Thu, 17 Sep 1992 21:15:00 GMT
Nntp-Posting-Host: magnum.convex.com
Organization: Engineering, CONVEX Computer Corp., Richardson, Tx., USA
X-Disclaimer: This message was written by a user at CONVEX Computer
              Corp. The opinions expressed are those of the user and
              not necessarily those of CONVEX.
Lines: 21

I'm looking for ICs, which can connect with fast CPU.

I have 10MHz version of Z80.  I need PIO and EPROM to connect with this CPU.
As you know, we can use slower devices using some TTLs, like 74LS74, to generate 
WAIT signal for CPU.  In order to make circuit simple and reduce current consumption,
I don't want to use additional ICs.  

I know the shop that has 8255A2, which is able to run at 10MHz but not C-MOS version,
and 82C55A5, which is CMOS version but not able to run at faster speed than 8MHz.
I need 82C55A2 which is CMOS and able to run at 10MHz.

I also know the shop that has 150 nsec version of 27C256.  I need 100 nsec version of it.

If I couldn't find these ICs, I must use the CPU at lower speed.

Dose anyone know the place where I can buy these special ICs ???
--
Mato Hattori
Convex Computer, U.S.A.       email: hattori@convex.com
3000 Waterview Parkway        office: 1+214-497-4304
Richardson, Texas 75083       home:   1+214-424-4655
