Advanced Programming Reference for Monroe 1800 Series calculators

[jefo...@gmail.com]

Dear Colleagues, 

Would any of you have a copy of (or a link to) the "Advanced Programming Reference  Manual for Monroe 1800 Series Calculators" ? Or equivalently for the Compucorp 400 (425G, 445...) Series Calculators ? 

Similarly of interest would be a copy of the "Operating and Programming Instructions" for the Compucorp Model 120, 121, 122 and 125 Calculators" ?

Images of the frontpages are attached. 

Looking forward to your feedback !

Jef Ongena

Belgium

[h100s...@sonic.net]

The only manual I have found online is the Litton Monroe 1800 300 I-O Writer manual here:

 

https://archive.org/details/cm_Monroe_300_I-O_Writer

 

Rick Bensene has a an original of one of the manuals I believe you are seeking, but it is not scanned.

 

I have not seen any correspondence from Rick in a while, I hope he is doing much better.

 

https://www.oldcalculatormuseum.com/m-m1800ap.html

 

Don Resor

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