Talk:Expanded memory
Latest comment: 5 months ago by 85.148.22.248 in topic IBM mainframe origin
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IBM mainframe origin
editExpanded memory was developed by IBM for mainframe computers under the name of expanded storage. I guess in 1970s, research needed. --Kubanczyk 07:59, 17 September 2007 (UTC)
- The only thing in common between the x86 architecture (segmented) and the IBM Mainframe Expanded Memory is the name, and the fact that they are both continuous linear address spaces with radically address mechanism, due to the design being separated by more than 20 years ( or 330 computer years, assuming that 1.5 computer years, is 25 human years )
- Expanded memory was introduced into the IBM PC compatible world with the introduction of the LIM 3.2 AST Rampage card. .
- Perhaps you were thinking this: "Expanded Storage is 4KB-page addressable. When an application wants to access data in Expanded Storage it must first be moved into Central Storage. Similarly, data movement from Central Storage to Expanded Storage is done in multiples of 4KB pages"
- Thus expanded memory on a PC is 32k bytes, and expanded storage is 4K virtual memory. Expanded storage is closer to expanded memory than extended memory. 170.75.140.124 (talk) 21:18, 26 August 2020 (UTC)
- When experimenting with this in the nineties I was able to use my keyboard buffer as
- the lim Ems addressing space to point to a r/w file so i could use it as a crude swap file. 85.148.22.248 (talk) 16:36, 12 June 2024 (UTC)