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The author discusses implementation challenges when building an asynchronous AGC (Apollo Guidance Computer) on a typically synchronous FPGA. More articles on the topic of building an AGC are available on the website. [0]

[0] http://mikestewart.hcoop.net

Great! I was getting crazy searching what is "AGC"

Mike Stewart is part of the team working to restore an actual Apollo Guidance Computer to full functionality -- check out CuriousMarc on YouTube for the full story: https://www.youtube.com/user/mverdiell/videos

Is there a typo in the URL or does the host block certain IPs? It seems to be offline for me...

The article needs to explain what AGC is. Most EEs associate it with Automatic Gain Control... which makes no sense in the context of FPGA.

Apollo Guidance Computer. The submitter mentions it here: https://news.ycombinator.com/item?id=20411683.

Yeah, I honestly thought this was going to be an article about a discrete automatic gain control loop in FPGA logic using DACs/ADCs as actuators/sensors.

Yes, although the entire website seems to be about AGC, so it's not the article's fault.

FPGA Support – Building an AGC