Lot 9488: Space Shuttle Input/Output Processor

RR Auction

RR Auction

2015-10-06 13:10:46

Lot 9488: Space Shuttle Input/Output Processor (IOP) manufactured by IBM Corp for Rockwell International, 10 x 7.5 x 19.5, with a parts tag affixed to the left side reading, "CII MC615-0001-0314, Serial No. 22, Contract No. NAS 9-14000, Date of Mfg 4-15-88, Model Type Production, Part No. 6247300-29." The front of the unit has seven ports labeled "J1" through "J7," as well as a "DSI" knob and analog counter to record time in use. In fine condition, with various scuffs and dings. This input/output processor was one of five identical units used onboard Space Shuttle Columbia. When paired with a CPU, it comprised the core of the IBM AP-101B General Purpose Computer (GPC). Four of these operated in sync for redundancy, while an independent computer acted as a backup. The CPU controlled access to the memory of the General Purpose Computers and executed commands to vehicle systems, while the IOP formatted and transmitted commands to Space Shuttle systems, received and validated response data, and maintained the status of interfaces with the CPU and the other GPCs. Oversized. Documentation includes a copy of "Orbiter Avionics Data Processing System Component S/N – Location Matrix," page 1-356, which has a spreadsheet-type format listing the STS flight numbers with their associated Central Processing Unit and Input-Output Processor serial numbers. An additional sheet, page 1-365, includes 16 different IOP serial numbers listed with their respective flights. A final sheet titled "GPC B Machines IOP" lists the part and serial numbers of seven flown IOP units (including this IOP) excessed by NASA in the early 1990's after the Space Shuttle upgrade to new IBM AP-101S units. This sheet has multiple flight listings by each IOP starting as early as STS-1. This particular IOP unit is listed as flown on Columbia (OV 102) flights 3, 4, 61C, (all pre-Challenger/STS-51L accident) and post-Challenger flight STS 28. During the 1986 to 1988 NASA return to flight effort, an update to the AP-101B series was perform to flight units, which kept their original serial numbers but changed the date of manufacture to 1988. In 2003, Space Shuttle Columbia (STS 107) broke apart during re-entry with the loss of all seven crew members. Images of documentation available upon request. RR Auction's Space and Aviation Auction 463 Thursday, 22nd October 2015 Estimate: $6000-8000
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