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The Apollo On-Board Computers

47 pointsby rayascottalmost 3 years ago

6 comments

mshookalmost 3 years ago
If you&#x27;re into that kind of stuff I recommend:<p>- watching <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;c&#x2F;CuriousMarc" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;c&#x2F;CuriousMarc</a><p>- reading Ken&#x27;s blog&#x2F;twitter <a href="http:&#x2F;&#x2F;www.righto.com&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.righto.com&#x2F;</a> &#x2F; <a href="https:&#x2F;&#x2F;twitter.com&#x2F;kenshirriff" rel="nofollow">https:&#x2F;&#x2F;twitter.com&#x2F;kenshirriff</a>
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itsjustjordanalmost 3 years ago
The source code is available on GitHub along with a virtual version you can play with.<p>- <a href="https:&#x2F;&#x2F;github.com&#x2F;chrislgarry&#x2F;Apollo-11" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;chrislgarry&#x2F;Apollo-11</a><p>- <a href="https:&#x2F;&#x2F;www.ibiblio.org&#x2F;apollo&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.ibiblio.org&#x2F;apollo&#x2F;</a>
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compumikealmost 3 years ago
You may also enjoy some of the historical photos here: <a href="https:&#x2F;&#x2F;wehackthemoon.com&#x2F;tech&#x2F;apollo-guidance-computer-agc-computer-engineering-breakthrough" rel="nofollow">https:&#x2F;&#x2F;wehackthemoon.com&#x2F;tech&#x2F;apollo-guidance-computer-agc-...</a><p>A few highlights:<p>- photo #2 shows the construction of <i>literally hand-weaved</i> read-only memory for the 36,864 words of fixed program memory. Literally weaving wires through (or bypassing around) tiny magnetic cores for each bit of storage. Must be re-weaved for a new &quot;build&quot;<p>- photo #10 shows the prototype, occupying many many racks (not yet miniaturized!)<p>- photo #20 shows characteristics of the machine (2048 words of writable memory; 575us for a double-precision multiplication)<p>- photo #24 <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=_gIrELUMtp0" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=_gIrELUMtp0</a> (32 seconds) shows large-scale breadboarding before the computer logic design was miniaturized<p>- <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=F1-KBKaCiMM" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=F1-KBKaCiMM</a> (4 minutes 28 seconds) gives a nice overview of the AGC challenges
shadowofneptunealmost 3 years ago
The best presentation I have seen on the AGC architecture: <a href="https:&#x2F;&#x2F;youtu.be&#x2F;xx7Lfh5SKUQ" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;xx7Lfh5SKUQ</a><p>It does present addresses in hexadecimal, oddly. The computer was 15-bit and used octal in its display panel. I suppose the presenters thought the audience would understand hex better.
tatoaloalmost 3 years ago
In addition to the fantastic ccc.de talk, I suggest this one related to the 1202 alarm: <a href="https:&#x2F;&#x2F;youtu.be&#x2F;B1J2RMorJXM" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;B1J2RMorJXM</a><p>Great talk and overall super presenter IMHO.
james-redwoodalmost 3 years ago
I once met a first year engineering student who was the daughter of a friend of mine. When she complained that you can do nothing cool with small computers, I pointed her to an article about this.