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JOHNNIAC instruction list #1

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larsbrinkhoff opened this issue Apr 15, 2020 · 2 comments
Open

JOHNNIAC instruction list #1

larsbrinkhoff opened this issue Apr 15, 2020 · 2 comments

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@larsbrinkhoff
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http://ed-thelen.org/comp-hist/Johnniac-instruction-list.gif

@sebras
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sebras commented Apr 16, 2020

http://ed-thelen.org/comp-hist/Johnniac-instruction-list.gif
That is the instruction list at March 16, 1955.

A later edition of the list from June 30, 1961 is available here in as a PDF:
www.bitsavers.org/pdf/rand/johnniac/List_of_Johnniac_Operations_Jun61.pdf

This later edition changes the interpretation of 10.0 SEL, 10.1 C and 10.6 EJ.
One notable addition is a plotter!

@sebras
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sebras commented Apr 16, 2020

Each instruction is further detailed in the JOHNNIAC Programmers' Manual by Wesley S. Melahn published on April 4, 1955 (the filename suggests it's from June 1955?):
http://www.bitsavers.org/pdf/rand/johnniac/Johnniac_Programmers_Manual_Jun55.pdf

A later version was published on July 22, 1955 where page 51 contains a modified instruction list as of November 12, 1956 which contains further details, not no plotter instructions:
http://www.bitsavers.org/pdf/rand/johnniac/D-3058_Johnniac_Programmers_Manual_Jul55.pdf

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