CHIPLIST 9.9.5a by Adrian Offerman, 1998/07/26

This is the old ChipList. It is here only for historical purposes.
You can find the latest ChipList at:

Since there are a lot of questions about the differences between the various chips used in the IBM PC, IBM PC/XT, IBM PC/AT, IBM PS/2 and compatibles, this list, containing their CPUs and NPXs, has been compiled for the benefit of the Net community. I hope it can answer some questions.

This list is the result of collecting many snippets of information from the Web, USENET News and data books. Furthermore, various contributors and others have helped to make this list to what it is today. Thank you all.

The complete Chiplist in a single HTML document is available at:

Interested in the Chiplist Cutter Perl script thats cuts the single-file Chiplist in the easy-to-navigate tree of paragraphs? For your own HTML cutting needs, you can download it from:


1 Introduction

2 CPU (Central Processing Unit)

3 NPX (Numerical Processor eXtension)