4109

Apollo Guidance Computer Block II Yul System Revision Readout: 'Retread 44'

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:800.00 - 1,000.00 USD
Apollo Guidance Computer Block II Yul System Revision Readout: 'Retread 44'

Bidding Over

The auction is over for this lot.
The auctioneer wasn't accepting online bids for this lot.

Contact the auctioneer for information on the auction results.

Search for other lots to bid on...
Auction Date:2020 Oct 15 @ 18:00 (UTC-05:00 : EST/CDT)
Location:15th Floor WeWork, Boston, Massachusetts, 02108, 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
Original printout of the assembly listing for the Apollo Guidance Computer program called "Retread 44," 304 pages, July 9, 1965, held within a contemporary 15.25˝ x 11.5˝ x 1˝ binder, marked on the front: "BLK II Program 'Retread,' Silver's Copy, Dick Sheridan." The listing is headed "275690 YUL SYSTEM FOR BLK2: REVISION 0 OF PROGRAM RETRED44 BY NASA 2021100." In very good to fine condition, with general wear and creasing to a few pages.

According to the Virtual AGC Project, which scanned this document for archival purposes, this is the oldest-known still-surviving AGC code. At the time it was written in 1965, its purpose was to port AGC code written for the Command Module's early 'Block I' AGC to the later-model 'Block II' AGC used for the flown Lunar Module missions. The assembler for the AGC code was called "YUL," so named by Hugh Blair-Smith to commemorate the unmet Christmastime delivery date of a prototype guidance computer in 1959.