Core rope memory - Wikipedia
WEBCore rope memory is a form of read-only memory (ROM) for computers. It was used in the UNIVAC I (Universal Automatic Computer I) and the UNIVAC II, developed by the Eckert-Mauchly Computer Corporation in the 1950s, as it was a popular technology for program and data storage in that era.
Software woven into wire: Core rope and the Apollo Guidance …
WEBAn unusual feature that contributed to its small size was core rope memory, a technique of physically weaving software into high-density storage. In this blog post, I take a close look at core rope and the circuitry that made it work. 1. Detail of core rope memory wiring from an early (Block I) Apollo Guidance Computer. Photo from Raytheon.
Software as Hardware: Apollo’s Rope Memory - IEEE Spectrum
WEBSep 29, 2017 — In rope memory, bits of information are represented by threads of wire and tiny doughnut-shaped magnetic cores. A core with wire threaded through the center represents a 1; an empty core represents a 0. In this way, the pattern of wires can form a computer program—software crystallized as hardware, in other words.
Making A Core Rope Read-only Memory - Hackaday
WEBOct 9, 2013 — This magnetic read-only memory (ROM), contrary to ordinary coincident-current magnetic core memories (used for RAM), uses the ferrite cores as transformers. If you look at the picture above,...
Core Rope Memory Built and Explained - F-J's Physics - YouTube
WEBWith the renewed interest in the Apollo missions and the associated hardware, especially the AGC (Apollo Guidance Computer), here I explain the amazing techn...
Inside the Apollo Guidance Computer's core memory
WEBCore memory was built from tiny ferrite rings called cores, storing one bit in each core. Cores were arranged in a grid or plane, as in the highly-magnified picture below. Each plane stored one bit of a word, so a 16-bit computer would use a stack of 16 core planes.
Apollo Flight Journal - The Apollo On-board Computers - NASA
WEBMemory provides the storage for the computer and is divided into fixed memory and erasable memory. The fixed memory is high density core rope; tiny nickel-iron cores woven together with thousands of copper wires and encapsulated in plastic.
A deep dive into the Apollo Guidance Computer, and the hack …
WEBJan 30, 2020 — Consider the limits the programmers were under: all the software for the flight to the Moon and back had to fit in 36K words (15 bits long, plus 1 bit for parity) of read-only core rope...
Making Core Memory – An experiment in troubling computing …
WEBJun 13, 2002 — Sitting under task lamps in a Raytheon facility outside of Boston, they are making “core memory” for the Apollo Guidance Computer. They thread the wire through the ferrite cores and code one bit of information into each connection. It looks similar to weaving. www.makingcorememory.org.
WEBThe Read-Only Memory (ROM) of the AGC is one of its de ning features, and is surpris-ingly well-known even outside of groups that focus on ancient computing. This is primarily due to the distinctiveness of the chosen imple-mentation: Core Rope Memory (CRM). In short, CRM involves the conditional wrapping of wire around magnetized ferrite