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A comment on It’s hard work printing nothing. Parent comment

Re:It’s hard work printing nothing by hexane360 on Monday August 08, 2016 @10:44PM (#12252240)
Although from hearing about the Apollo Guidance Computer, it's just as much of a miracle they were able to get it to work without any debugging or compilers, with basically one shot to write the program to ROM.
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Re:It’s hard work printing nothing by roberthensing on Tuesday August 09, 2016 @06:13AM (#12253581)
Well they put in an effort of 1400 man years for just the software. They even built an interpreter, because (flight/trajectory) requirements were changing all the time.

Also: "The highest level of testing was performed with a high fidelity digital simulation of the computer, spacecraft hardware, and mission environment."

http://klabs.org/history/history_docs/mit_docs/1711.pdf

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