HP-91 Simulator

[teenix]

(02-09-2017 08:22 AM)Dieter Wrote:  There was a major change in the internal routines, starting in 1976 with the HP67/97 and 91. At that time HP switched to the now common 13-digit internal precision, among other improvements e.g. in the trig routines. This significantly improved accuracy.

Details can be found in the November 1976 issue of HP Journal, p. 16 ("The New Accuracy: Making 2³=8").

Dieter

Always something you find out about too late :-)

When I get some spare time I will take a further look.

Thanks for the tip.

cheers

Tony