memory

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What exactly is the difference between extended memory and expanded memory?

 

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Hi Andre, welcome to Certforums.


Here is a link explaining the differences.


HTH

http://kb.indiana.edu/data/aalu.html?cust=012109.62162.131
Andy

 

So let me get it straight. Extended memory reffers to hardware while reffers to a software side ? Is that correct?

 

Expanded memory is a technique for utilising more than 1MB (megabyte) of main memory in DOS -based computers. The limit of 1MB is built into the DOS operating system. The upper 384K is reserved for special purposes, leaving just 640K of conventional memory for programs.

Extended Memory is memory above and beyond the standard 1MB (megabyte) of main memory that DOS supports. Extended memory is only available in PCs with an Intel 80286 or later microprocessor. Two types of memory can be added to a PC to increase memory beyond 1MB: expanded memory and extended memory. Expanded memory conforms to a published standard called EMS that enables DOS programs to take advantage of it. Extended memory, on the other hand, is not configured in any special manner and is therefore unavailable to most DOS programs. However, MS-Windows and OS/2 can use extended memory.

HTH

 

anyone remember the days of memmaker?

 

all too well loads of fun trying to make sure as much of the vital 640k was available.

 

So how is it now? Are there still extended and expanded memory in modern computers? (let's say P.IV or Athlon) or that terms reffers only to DOS times?

 

Today's computers utilise all memory for processing without any concerns about whether it is extended or conventional memory.