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M0FYA Andy · 21st Nov 2018, 1:16 pm

Craig, your quote "Because they don't understand that the project is impossible, so they will succeed where experienced designers will fail" is reminiscent of what was said at the reopening of the Southern Stratford Canal by David Hutchings (the project leader) in his reopening speech - "When we started this project, all the experts told us it was impossible. Fortunately none of us were experts, so we just got on and did it".

Back on the subject of the AGC, a pal of mine who has studied the subject tells me he has never found out why the designers used 1's complement logic rather than the more standard 2's complement. 1's complement has two values for zero which can cause problems. Does anybody know the reason for this choice?

Andy

21st Nov 2018, 1:16 pm	#6
M0FYA Andy Nonode Join Date: May 2007 Location: Preston, Lancashire, UK. Posts: 2,511	Re: Apollo Guidance Computer Craig, your quote "Because they don't understand that the project is impossible, so they will succeed where experienced designers will fail" is reminiscent of what was said at the reopening of the Southern Stratford Canal by David Hutchings (the project leader) in his reopening speech - "When we started this project, all the experts told us it was impossible. Fortunately none of us were experts, so we just got on and did it". Back on the subject of the AGC, a pal of mine who has studied the subject tells me he has never found out why the designers used 1's complement logic rather than the more standard 2's complement. 1's complement has two values for zero which can cause problems. Does anybody know the reason for this choice? Andy