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Space Shuttle Input/Output Processor

Currency:USD Category:Collectibles Start Price:NA Estimated At:6,000.00 - 8,000.00 USD
Space Shuttle Input/Output Processor

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Auction Date:2015 Apr 23 @ 18:00 (UTC-5 : EST/CDT)
Location:236 Commercial St., Suite 100, Boston, Massachusetts, 02109, United States
ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed
Shuttle Input/Output Processor measures 10 x 7.5 x 19.5 and is stenciled on the side in red paint, “Ground Use Only.” Front of the processor has six large data ports and a small analog counter to record hours of use. An IBM/Rockwell International Space Division label is affixed to one side and reads, in part: “Serial No. 04…Input Output Processor, Date of Mfg: 9/20/78, Model Type: Production.” In fine condition. The function of this processor was to interface the Space Shuttle avionics system with the Central Processing Unit (CPU)/Flight Computer. Development of the Space Shuttle Program’s General Purpose Computers (GPC) began in early 1972. This unit is a first generation early production unit based on the serial number. There were five sets of GPCs in the Shuttle Orbiter, each with two major components constructed as individual units—the IOP and a central processing unit (CPU). All are interconnected via data transmission cables along common party lines. This allows dual and in some case triple redundancy for all flight functions. The IOPs are designed to format and transmit computer commands to and receive responses from all the orbiter's flight systems. Additional functions include maintaining interaction status with its own CPU and the other GPCs. These activities are performed by a series of 24 independent data processors and 24 data buses that transmit serial digital data.