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IBM FEDERAL SYSTEMS
IBM AP-101S (Shuttle GPC)
Flight ComputerGeneral Purpose Computer● Retired
MASS
29 kg
POWER
550 W
REDUNDANCY
Quintuple redundant (4+1 backup)
RAD HARDENED
Yes
FIRST USE
Apr 1981
IBM AP-101S (Shuttle GPC) is a flight computer system manufactured by IBM Federal Systems. It features quintuple redundant (4+1 backup) redundancy. Radiation hardened for space environments.
ABOUT IBM AP-101S (SHUTTLE GPC)
The AP-101S was the General Purpose Computer used aboard the Space Shuttle, manufactured by IBM Federal Systems. Each orbiter carried five redundant units running the HAL/S programming language. It managed guidance, navigation, and flight control throughout all mission phases from launch to landing.
OPERATING PRINCIPLE
Von Neumann architecture with 32-bit word length, 1 MIPS throughput, 256 KB main memory
VEHICLES USING THIS SYSTEM
Space Shuttle
SPECIFICATIONS
| CATEGORY | Flight Computer |
| TYPE | General Purpose Computer |
| MANUFACTURER | IBM Federal Systems |
| MASS | 29 kg |
| POWER CONSUMPTION | 550 W |
| REDUNDANCY | Quintuple redundant (4+1 backup) |
| RADIATION HARDENED | Yes |
| ACCURACY | N/A |
| FIRST USE | April 12, 1981 |
| STATUS | Retired |
DETAILED SPECS
| WORD_LENGTH | 32-bit |
| MEMORY | 256 KB |
| THROUGHPUT | 1 MIPS |
| LANGUAGE | HAL/S |
