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.
Apollo Flight Journal - The Apollo On-board Computers - NASA
WEBThe 'core rope', used for the fixed memory, has a capacity of about 36,864 words with an erasable memory (of ferrite core planes) of 2,048 words. The processor is formed from integrated circuits (ICs). The total computer weight is 29.5 kg.
Software as Hardware: Apollo’s Rope Memory - IEEE Spectrum
WEBSep 29, 2017 · This excellent NASA/MIT film from 1965, Computer for Apollo, demonstrates how rope memory was manufactured: The supervisors responsible for overseeing the careful integration of changes and additions to the software were known as “rope mothers,” regardless of their actual gender identity.
Core memory weavers and Navajo women made the Apollo …
WEBFeb 18, 2022 · Core memory used metal wires threaded through tiny doughnut-shaped ferrite rings, or “cores,” to represent 1s and 0s. All of this core memory was woven by hand, with women sitting on...
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...
The Amazing Handmade Tech That Powered Apollo 11’s Moon …
WEBJul 17, 2019 · The Apollo computers were designed with a kind of memory called “core rope memory.”
NASA used 'LOL memory' in the Apollo missions - The Verge
WEBApr 26, 2012 · NASA used radiation-resistant core rope memory, which consisted of fermite rings woven together with rope, for its Apollo space missions.
Apollo 11 Lunar Surface Journal: Program Alarms - NASA
WEBThe on-board Apollo Guidance Computer (AGC) was about 1 cubic foot with 2K of 16-bit RAM and 36K of hard-wired core-rope memory with copper wires threaded or not threaded through tiny magnetic cores. The 16-bit words were generally 14 bits of data (or two op-codes), 1 sign bit, and 1 parity bit.
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