Who wants to help read a Saturn V core stack?

Tony Duell wrote: That's certainly true of normal read-write core storage. However, there was also a read-only form of core storage, known by the names "core rope memory", "wire braid memory", etc. In this form of core memory, the magnetization of the cores is not used to store the data, but rather the pattern of threading. The cores don't even need to exhibit the hysteresis loop needed for read-write core storage. Each core stores multiple bits of data; a typical system may store 64 bits per core. This was advantageous where it is undesirable for the data to be changed (e.g., a fixed program or data table), and where mass and volume are at a premium. The drawback was that if you decided you wanted to change the data, the most cost-effective way to do so was to replace the entire core assembly. This form of memory was used for the program storage of the Apollo Guidance Computer. I have no idea whether it was used for the LVDC, but it certainly wouldn't surprise me. Eric