Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!mailrus!ncar!tank!sophist!goer From: goer@sophist.uucp (Richard Goerwitz) Newsgroups: comp.unix.xenix Subject: Re: total memory Keywords: total memory Message-ID: <8111@tank.uchicago.edu> Date: 17 Mar 90 07:34:58 GMT References: <2@grumbly.UUCP> Sender: news@tank.uchicago.edu Reply-To: goer@sophist.UUCP (Richard Goerwitz) Organization: University of Chicago Lines: 13 In article <2@grumbly.UUCP> root@grumbly.UUCP (Superuser) writes: >I have 8 megs of main memory on my SCO Unix 3.2.1 system. When it comes up >it reports total memory as 7808 k instead of 8192 k. Where is the missing >384 k? Hint: Subtract your 384 k from 1024 k (the total amount of memory addressable by an 8088/6 chip), and presto, you get the answer 640 (the amount of user memory accessible via standard PC architecture). That "upper" 384 k is used by all PC's and their descendents for various things like the system BIOS, video memory, etc. -Richard L. Goerwitz goer%sophist@uchicago.bitnet goer@sophist.uchicago.edu rutgers!oddjob!gide!sophist!goer