Read-mostly memory

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]

References

^ Neale, Ronald "Ron" G.; Nelson, D. L.; Moore, Gordon Earle (1970-09-28). "Nonvolatile and reprogrammable, the read-mostly memory is here" (PDF). Electronics. McGraw-Hill. pp. 56–60. S2CID 137556114. Retrieved 2020-07-01.
^ Handy, Jim (2018-01-17). "Original PCM Article from 1970". The Memory Guy, Objective Analysis, Semiconductor Market Research. Archived from the original on 2020-07-01. Retrieved 2020-07-01.
^ Bode, Arndt ; Händler, Wolfgang (1980). Written at Erlangen, Germany. Rechnerarchitektur: Grundlagen und Verfahren (in German) (1 ed.). Berlin / Heidelberg, Germany; New York, USA: Springer-Verlag. p. 102. ISBN 3-540-09656-6. 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)
^ Klar, Rainer (1989) . "Tabelle 6.2 Beispiele mikroprogrammierter Rechner" [Table 6.2 Examples of micro-programmed computers]. Digitale Rechenautomaten – Eine Einführung in die Struktur von Computerhardware [Digital Computers – An Introduction into the structure of computer hardware]. Sammlung Göschen (in German). Vol. 2050 (4th reworked ed.). Berlin, Germany: Walter de Gruyter & Co. p. 223. ISBN 3-11011700-2. Honeywell H4200 1966 Kernspeicher 2 Kerne/Bit RMM: Read-mostly-Memory, d.h. Speicher mit langsame Schreiben, aber schnellem Lesen (320 pages)
^ Astels, Dave (2020-07-01) . "Read Mostly Memory". adafruit. Archived from the original on 2020-07-01. Retrieved 2020-07-01.

See also

References

Further reading