Core 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 …

2017年9月29日 · During the missions themselves, rope memory served as the Apollo Guidance Computer’s “fixed memory,” containing the navigation and guidance software that, in 1969, landed humans on the moon for the first time. Factory workers, usually women, painstakingly encoded each bit of information by hand.

2013年10月9日 · 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,...

The core rope memory achieved a density of 1500 bits per cubic inch, including the driving hardware and packaging. This was about 5 times the density of erasable core memory. See MIT's Role in Project Apollo vol III pages 91 and 274.

2022年12月5日 · Core Rope Memory is a form of Read Only Memory, or ROM. It is not to be confused with the similarly named core memory in the form of Random Access Memory or RAM. Core rope memory worked by weaving many sense wires through or around several cores.

The '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).

2016年9月2日 · [Francois Rautenbach] was lucky enough to get his hands on the rope memory modules from the AS-202 mission. Now he’s investigating these modules with oscilloscopes and x-rays to recreate some...

2002年6月13日 · We invite Technology’s Stories readers to revisit the story of the core memory weavers as a way to explore under-recognized contributions to early computer innovation. The software programs for the Apollo moon missions were permanently stored through hard wiring the code into “core rope memories”.

2022年6月7日 · We have explained how core rope memory was used as the computer memory storing the Apollo guidance computer program that got us to the moon. A team from the University of Washington came up with a fun craft activity to make your own core memory.

There are two main components of addressing core rope memory: core selection and strand selection. The goal of core selection is to select a single core out of the 512 in a module. This is done in two phases: the "set" phase and the "reset" phase.