bw@hpcvlo.HP.COM (Bill Wilhelmi) (01/20/87)
Steve, The HP 28C was introduced January 5, 1987 at a list price of $235. An infrared printer (no cable required!) is also available for $135. (The printer product number is HP 82240A.) Here are a few features of the calculator: * Most real and complex-number math functions work with symbolic as well as numeric values. * An equations solver, similar to the solver on the 18C Business Consultant, solves equations for any unknown anywhere in the equation. * It has softkeys and menus available. * Matrices are stored as single objects so that you can multiply two matrices at the press of a single key. * A user-definable unit conversion system that includes 120 units. New units can be defined and assigned to softkeys as if they were built in. * You can plot functions on the display or on the infrared printer. * You can enter expressions in RPN or algebraic format. * Comes with two manuals: A getting started manual (about 120 pages) and a reference manual (about 300 pages). Bill Wilhelmi
jimh@hpsadla.UUCP (02/06/87)
Just some notes -
MAPLE is an interactive symbolic math system that runs on a VAX using
UNIX 4.3. The '28C is a much-tiny machine along the same lines.
The keyboard halves talk together via a long skinny flex-PC board. It
goes up into the hinge from the left half, makes a U-turn at the top, and
back down into the right half. Its life should be in the millions of
flexes. That Kapton film really works!
The '28C is NOT intended as a replacement to the '41 in any way.
Think of it as the next-generation more powerful '15C.
By the way, if you want to get the printer confused, try PRINTing on a
number of '28s with the same printer all at the same time. ;-)
Nifty machine - I want one!
Jim Horn
(In no way affiliated, endorsed, or acknowledged by HP, especially Corvallis.)daver@hpsgpa.UUCP (02/10/87)
> By the way, if you want to get the printer confused, try PRINTing on a >number of '28s with the same printer all at the same time. ;-) The range of the printer was intentionally limited to try to prevent this from happening accidentally. Apparently the IR keyboard for the IBM PCjr worked fine in individual homes, but when schools tried to use them in classrooms they found a massive interference problem. This lesson was applied to the 18C, 28C and RedEye printer.
jimh@hpsadla.UUCP (02/12/87)
>> By the way, if you want to get the printer confused, try PRINTing on a >>number of '28s with the same printer all at the same time. ;-) >The range of the printer was intentionally limited to try to prevent this from >happening accidentally. Apparently the IR keyboard for the IBM PCjr worked >fine in individual homes, but when schools tried to use them in classrooms they >found a massive interference problem. This lesson was applied to the 18C, 28C >and RedEye printer. That's right - we noticed that right away; the confusion by the printer was deliberate on our part. I can't consider it likely to happen by accident, to say the least. My apologies if that was the impression I left. With more capability in many regards than prior small HP printers (82143 at $385 and 82162 at $450) at a fraction the size and price ($135), the 82240 is a real improvement for HP. Good work! Jim "Hey, I wanna HP82240 too!" Horn