12/9/99
About AE.A2e.FastMath.card.Front.jpg and AE.A2e.FastMath.card.Back.jpg
Sent to me for scanning by Dr. Hank Levinson, this card is Applied
EngineeringÕs Fast Math Card for the Apple IIe, Rev.1.0 released in 1991.
It uses a National Semiconductor NS32081 floating point chip. It gives
accuracy to 16 decimal places rather than AppleÕs 8 decimal places. This
allows much finer (higher magnification) fractal images. Also, certain
bugs in AppleÕs arthmetic are fixed.
As an example of this (if you have such a card to use)...Try;
10 A=1 * 1.00000011
20 PRINT A
and
10 A=1.00000011 * 1
20 PRINT A
They should both print 1.00000011. But, the first one gives 1.00000006.
The chip with the heatsink is the NS 32081. The ROM contains faster
routines for multiplecation, division, Pi, and sin x, cos x, etc. - also,
more accurate to more decimal places. ItÕs manual is for more technical!
My special thanks to Dr. Hank Levinson for sending this card for the scan
to show itÕs detail for all those interested in viewing it.
Cheers,
Tom
----------------------------
Charles T. ÔDr. TomÕ Turley
Email: cturley#grin.net