Atari Calculator

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Atari Calculator (or Calculator) is a proprietary software program developed by Atari, Inc. for Atari 8-bit computers and published in 1979. It incorporates the functionality of a scientific calculator into a software calculator. It was written in assembly language by American programmer and game designer Carol Shaw. The program supports multiple modes, including enabling it to be used as a programmable calculator with a then-popular reverse Polish notation (RPN) input method.

History

In 1977, the Calculator computer program was developed by Carol Shaw at Atari, Inc.[1][2][3][4] In 1979, the screenshot of the Atari Calculator, with the title ATARI CALCULATOR COPYRIGHT 1979 in the main window, was printed in the "Touch the future." brochure on the screenshots gallery page, featuring the upcoming Atari 800 computer. The UI was colored in light bluish text on a dark blue background.[5] In the same year, the "Calculator: Instruction Manual" book was printed, and program got product ID number CX-8102. On the screenshots of the program, printed in grayscale in the manual, the title in the main window changed to CALCULATOR COPYRIGHT (C) ATARI 1979.[6]

In 1981, the Calculator was marketed in the "Atari Personal Computer Product Catalog".[7]

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In September 1981, the Atari Calculator was marketed in the Atari Connection magazine, in the section for new business and professional applications:[8]

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During 1981—1982, it was distributed in two variants, by Atari, Inc. itself and by the Atari Program Exchange (APX) department,[9][3] in the form of boxed diskette, together with the Atari DOS 2.0, for the Atari 8-bit computers.[10][11]

In June 1982, the "Calculator: Instruction Manual" book was printed by the APX, noted with "User-Written Software for Atari Computers" on the cover, and the program got product ID number APX-20130.[12] In the same year, product CX-8102 was listed in the "Atari Home Computer Product Catalog". On the screenshot, printed in color in the catalog, the colors of the UI were changed from dark blue to reddish brown, the output line colored in black with gray text, and the input line colored in light bluish colors.[13]

After 1982, there was little news about the Atari Calculator, its development, and it was excluded from the listing in the next official catalogs by Atari.[14][15][16]

On 12 October 2011, Benj Edwards,[17] a tech reporter and historian, published on the "Vintage Computing & Gaming" site the transcription of the interview with Carol Shaw, who left Atari after 1980.[10] During the interview, there was revealed details about the Atari Calculator origin and development:

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Features

Data sources: the official Atari manuals and catalogs, Carol Shaw's papers, the Atari Connection magazine, the AtariWiki

Alternatives

The Atari Calculator was not the only RPN calculator for Atari 800, there was also the commercial RPN Calculator (ID numbers APX-10105 and APX-20105), written in Atari BASIC by John Crane,[18][19][20] and the Atari Rechner Simulation mit UPN by MTC (imitating hardware RPN calculator).[21][22][23]

In October 2014, Norbert Kehrer created free simulators of the Hewlett-Packard RPN calculators (HP-35, HP-45, HP-55 and HP-80) for Atari 800XL and Commodore 64.[24][25]

For the later Atari computers, further scientific calculators were developed, for example, there were two public-domain software calculators: the Scientific Calculator by M. Weller for Atari ST,[26] and the RPN Calculator by Arnauld Chevallier for Intellivision.[27]

Atari hardware calculators

In the late 1980s, Atari produced a line of hardware desktop and pocket calculators, but none of them had programming support and an RPN input.[28][29][30]

Legacy

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In 2012, the Atari Calculator was highlighted in an article published in the ABBUC Magazin (Issue #111), which was published by the German-based, Atari Bit Byter User Club e.V.,[31] and the styled Atari Calculator title was featured on the cover.[32] Cover design and fan art illustrations assisting the article authored by Oliver Rapp.[33][34] Cover illustration also includes a sign in a lower right corner in a form of mathematical formula to say "Thank you", used by Atari community to honor notable contributors:[35]

∑i=0∞(ThankyouCarol)i

Rapp also designed a label for the possible future ROM cartridge release of the Atari Calculator, reserving ID number CXL-4028.[36]

On 27—28 April 2013, the Atari Calculator was displayed at the 14th Vintage Computer Festival Europe (VCFe) in Munich, and Vortrag Wassenberg made its presentation. Slides from this presentation were published online.[37]

On 22 November 2013, Peter Dell[38] released a ROM cartridge version of the modified original Atari Calculator with adding startup screen, as a personal gift sent to Carol Shaw:[39]

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In 2013, Norbert Kehrer ported the original Atari Calculator to Commodore 64.[40][41][42]

On 5 November 2014, the Atari Calculator was highlighted on the 'Inverse ATASCII Podcast'. The podcast site also published the source of the example program for the Atari Calculator, newly created cheat sheet, screenshots of software screen in various modes and an excerpt from the original user manual showing a mistake on instruction illustration.[43][44][45]

Colleen Calculator

On 31 August 2016, Kay Savetz, the host of the 'ANTIC podcast', uploaded at the Internet Archive the scans of the Colleen Calculator source printouts, an unreleased cartridge version of the Atari Calculator — obtained from Harry Stewart — which was originally presented by Carol Shaw. In addition, two source printiouts, which included code for floating-point arithmetic handling, were scanned and uploaded the Atari Calculator cartridge specification, handwritten by Shaw, and the official prited user manual for the Atari Calculator.[46] Savetz uploaded it all with a permission from Shaw, and the original printouts Shaw had donated to and now are storing at the Strong Museum, as well as all of the materials related to Atari, she collected during her employment period at the Atari (1978–1980).[47]

On 29 June 2017, Shaw was hosted by Savetz on the "ANTIC" podcast. During the interview, Shaw described more details about the Atari Calculator and the Colleen Calculator development.[48][49][50]

On 4 September 2020, Savetz released on GitHub source files of the Colleen Calculator, recovered and reconstructed from scanned printouts.[39][51] The header in source files includes info on the initial commit date by Shaw:

Template:SyntaxhighlightThe name of the Colleen Calculator refers to the codename of Atari 800 — the "Colleen".

Template:Columns-startUI layout from the screenshot printed in 1979:[5]Template:Monodiv Template:ColumnUI layout from the screenshot printed in 1982:[13]Template:Monodiv Template:Columns-end

See also

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Publications

References

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