THE CORE MEMORY FORUM

NCR Computers of the 20th Century => History => Topic started by: NEXUS on May 08, 2008, 07:44:41 pm



Title: NCR Century and Criterion Series
Post by: NEXUS on May 08, 2008, 07:44:41 pm
The two very interesting new sections in this site dedicated to the NCR Century and Criterion Series, have made their debut.

I just read these pages;  the excellent contributions by  Walter Niblick and Ian Ormerod are remarkable texts, and I wish I had them available when I first started my training on these systems!

Congratulations to both.

Emmanuel


Title: Re: NCR Century and Criterion Series
Post by: JimT on May 08, 2008, 10:11:50 pm
That is great information!  I sent a note to the webmaster that the only issue I saw was the statement that there was only one IC used in the Century series.   

"It's been a very long time, but as I recall there were three types of IC's.  The NCR 74 had something like 4 gates with two inputs, the NCR 80 had two gates with 4 inputs, and the NCR 94 was used as an interface chip as it had a higher input threshold and more drive current.  The circuits were all DTL logic."