The Web Site to Remember National Semiconductor's Series 32000 Family


This chapter is a collection of different items. Not all of them are written in english language.


Weitek was the recognized leader for high performance floating-point processors in the 1980's. National Semiconductor worked together with them and developed two interface chips to connect Weitek processors to Series 32000 CPUs. The first one was the NS32310 FPA which never appeared on the market. It was planned to use the Weitek WTL1164/WTL1165 chip set. The second one was the NS32580 FPC. This one was available on the market. It was used together with the WTL 3164. The preliminary datasheets of the Weitek chips are available here:

WTL 1164 & WTL 1165 Datasheet

WTL 3x64 Datasheet

First Draft of AN-383

The document presented here is the predecessor of the famous Application Note 383. This Note described how to use the NS32081 FPU together with the Motorola MC68000. The idea was very popular because Motorola offered no FPU for their 16-bit processors. I think that the engineers from Motorola were very unhappy with this solution ...

NS16081 FPU as a Peripheral


As an example of using the NS32081 FPU as a peripheral the documentation of a VME board development is presented here. The assembly code at the end is written for the Motorola MC68000 processor.

NS16081 FPU VME Board

Das 32000 Sonderheft

In 1986 the magazine Das 32000 Sonderheft appeared about Series 32000 in Germany. It was originally published by Franzis-Verlag GmbH. Today the copyright is held by Fachmedium elektronik (owner WEKA FACHMEDIEN GmbH). Their link is I got the permission to present the magazine here.

Fig. 1. The top page of Das 32000 Sonderheft.

The magazine presented on 160 pages all possible information about Series 32000 including applications. It is said that it was sponsored by National Semiconductor. The price of 28,- DM ( ˜15 glas of beer) was very high. If I remember right I got my copy from a friend.

Fig. 2. The list of content of Das 32000 Sonderheft.

One of the applications presented in the magazine was about a 3D-Real-Time Graphics Computer on page 137. Thanks to Uwe I can present his original manuscript here. It is written in german language.

3D-Echtzeit Grafikrechner mit UNIX 32-Bit Micro

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