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a+ op syst portion-memory 2

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yanqui

Technical User
Aug 19, 2002
70
US
I'm studying for the a+ exams--okay, who in this forum isn't or hasn't? Anyway, I'm in the portion on operating systems. I thought I was well-versed on dos. But the part on memory is kicking me. I'm using Marcraft's Top Score study system, and it's pretty comprehensive and detailed, but maybe it's just the way the stuff is worded that I can't get it. Does anyone out there have a good resource for learning all about memory--conventional, upper, high, extended, expanded? See, I know the words, I just can't grasp how and when each is implemented.
 
On DOS systems, conventional memory refers to the portion of memory that is available to standard DOS programs. DOS systems have an address space of 1MB (megabyte), but the top 384K (called high memory) is reserved for system use. This leaves 640K of conventional memory. Everything above 1MB is either extended or expanded memory.

For deeper info:


Good Luck!

A+,N+,S+,L+,I+,CFOT,Qlogic,CCNT,ISA CCST3
 
Thank you for your help. That website you provided promises to prove an invaluable resource in my studies now and in future certification endeavors! I've bookmarked it and I expect to return to it quite often.
 
good post glister. Kimber

The more I learn,I realize how much more there is to know!
 
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