IBM AP-101 general-purpose computer
https://gandalfddi.z19.web.core.windows.net/Shuttle/IBM%20AP-101S%20General%20Purpose%20Computer%20With%20Shuttle%20Instruction%20Set.pdfArticle
- Technical document covering the IBM AP-101S, the Space Shuttle’s flight computer
- Part of IBM’s System/4 Pi avionics computer family
- Includes the Shuttle-specific instruction set architecture
Discussion
- Ken Shirriff’s recent writeup on the System/4 Pi family linked as companion reading
- Commenters noted HAL/S (Shuttle programming language) docs and compared to Artemis/Orion using MISRA-C
| Type | Link |
| Added | Apr 17, 2026 |
| Modified | Apr 17, 2026 |