Software archaeology - Learning from the landing on the moon!

on YouTube ↗50m

" summary

The Apollo Guidance Computer is a 16‑bit, 2 MHz embedded system consuming 55 W with 2,000 words of RAM and about 36,000 words of ROM, running a real-time executive that schedules seven prioritized tasks and handles 11 interrupts. It implements a virtual machine interpreter for math and navigation, drives the DSKY interface, and stores code now on GitHub. During Apollo 11 1201/1202 program alarms caused by a rendezvous radar overloading the executive the software drops low‑priority jobs, signals overload, and lets the landing complete safely.

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" chapters (43)

1. 0:00Introduction
2. 0:19Artemis program
3. 1:48Sputnik shock
4. 2:59Kennedys speech
5. 4:43Space race
6. 5:36Germany program
7. 6:54Apollo program
8. 7:51Details
9. 8:37Review
10. 9:56Apollo 8 Wonderful Patch
11. 10:53Apollo 10 Dress rehearsal
12. 13:09Apollo Guidance Computer
13. 15:33Hardware
14. 16:06Weight
15. 17:09Computer architecture
16. 17:40Integer range
17. 18:22Precision
18. 20:34Heavy constraints
19. 21:46Memory banking
20. 22:45Clock rate
21. 23:07Data rate
22. 23:40User interface
23. 24:14Web page
24. 24:43Simulation
25. 28:25Short demo
26. 28:40Realtime operating system
27. 29:22Interest
28. 29:55State Vector
29. 30:55Virtual Machine
30. 31:49Apollo Guidance
31. 37:04Program Alarm
32. 38:10Executive Overflow
33. 38:58The Interpreter
34. 39:25Rendezvous Radar
35. 42:16Margaret Hamilton
36. 44:05Human errors
37. 45:49Shared responsibility
38. 46:12Digital autopilot
39. 46:58GitHub
40. 47:12Short example
41. 47:45What we learned
42. 49:06The most important principle
43. 49:33Contact Tobias

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