Read-mostly memory
From HandWiki
Read-mostly memory (RMM) is a type of memory that can be read fast, but written to only slowly. Historically, the term was used to refer to different types of memory over time:
In 1970, it was used by Intel and Energy Conversion Devices to refer to a new type of amorphous and crystalline nonvolatile and reprogrammable semiconductor memory (phase-change memory aka PCM/PRAM).[1][2] However, it was also used to refer to reprogrammable memory (REPROM)[3] and magnetic-core memory.[4]
The term has mostly fallen into disuse, but is sometimes used referring to electrically erasable programmable read-only (EEPROM) or flash memory today.[5]
See also
- Read-only memory (ROM)
- Read–write memory (R/W)
- Programmable read-only memory (PROM)
- Random-access memory (RAM)
References
- ↑ "Nonvolatile and reprogrammable, the read-mostly memory is here". Electronics (McGraw-Hill): 56–60. 1970-09-28. https://objective-analysis.com/uploads/Electronics%201970%20Neale%20Nelson%20Moore.pdf. Retrieved 2020-07-01.
- ↑ "Original PCM Article from 1970". The Memory Guy, Objective Analysis, Semiconductor Market Research. 2018-01-17. https://thememoryguy.com/original-pcm-article-from-1970/#more-1658.
- ↑ (in de) Rechnerarchitektur: Grundlagen und Verfahren (1 ed.). Berlin / Heidelberg, Germany; New York, USA: Springer-Verlag. 1980. p. 102. ISBN 3-540-09656-6. https://books.google.com/books?id=22igBgAAQBAJ&pg=PA102. Retrieved 2020-07-01. "[…] RMM (Read mostly memory) oder REPROM (Reprogrammable memory): Semifestspeicher, bei denen das Schreiben möglich, jedoch wesentlich aufwendiger als das Lesen ist (meist um einige Zehnerpotenzen). […]" (xii+278+2 pages)
- ↑ "Tabelle 6.2 Beispiele mikroprogrammierter Rechner" (in de). Digitale Rechenautomaten – Eine Einführung in die Struktur von Computerhardware. Sammlung Göschen. 2050 (4th reworked ed.). Berlin, Germany: Walter de Gruyter & Co.. 1989. p. 223. ISBN 3-11011700-2. "[…] Honeywell H4200 […] 1966 […] Kernspeicher […] 2 Kerne/Bit […] RMM: Read-mostly-Memory, d.h. Speicher mit langsame[m] Schreiben, aber schnellem Lesen […]" (320 pages)
- ↑ "Read Mostly Memory". adafruit. 2020-07-01. https://learn.adafruit.com/digital-circuits-5-memories/read-mostly-memory.
Further reading
- "Amorphous non-volatile ram" States4199692A United States patent 4199692A
 |  |
