Article View: comp.sys.misc
Article #216Re: RPN Calculators
From: Goran Larsson [Hacker of Hackefo...
Date: Wed, 15 Nov 1989 16:40
Date: Wed, 15 Nov 1989 16:40
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In article <1505@cipc1.Dayton.NCR.COM> tbertels@cipc1.Dayton.NCR.COM (Tom Bertelson) writes:
>I have a National Semiconductor RPN calculator that I still
>occasionally use. It's the only calculator I know that will float
>(with the battery removed). 5 cubed would equal, after about two
>second's thought, 124.9999999. I think it was called the
>"Scientific". Does anyone else remember this thing?
Yes! They had two versions: INFIX and RPN. The CPU was a weird one-bit
controller. You could buy the CPU and also two ROM chips with the code
for the two calculators. A special version of the CPU did not drive the
keyboard and display, it had a BCD port. It was supposed to be used as
a floating point chip! It was S-L-O-W....
! _
! ! Goran Larsson [The Hacker of Hackefors]
--+-! Hackefors, Linkoping, SWEDEN (See) +46 13-155535 (Hear)
!-+-- ...!uunet!sunic!liuida!prodix!isadora!hacker (UUCP)
! ! hacker@isadora.ikp.liu.se (Internet)
! Mmh, Yes
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!snorkelwacker!bloom-beacon!eru!luth!sunic!liuida!prodix!isadora!hackerReferences:
<2148@leah.Albany.Edu> <2039@zen.co.uk> <1505@cipc1.Dayton.NCR.COM>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!snorkelwacker!bloom-beacon!eru!luth!sunic!liuida!prodix!isadora!hacker From: hacker@isadora.ikp.liu.se (Goran Larsson [Hacker of Hackefors]) Newsgroups: comp.sys.misc Subject: Re: RPN Calculators Message-ID: <529@isadora.ikp.liu.se> Date: 15 Nov 89 16:40:43 GMT References: <2148@leah.Albany.Edu> <2039@zen.co.uk> <1505@cipc1.Dayton.NCR.COM> Sender: news@prodix.liu.se Reply-To: hacker@isadora.ikp.liu.se Organization: Hackers Home, Hackefors, Linkoping, Sweden Lines: 19