BIOS SETUP
TF-486 / 29
Memory : You cannot change any values in the Memory fields; they are only for your
information. The fields show the total installed random access memory (RAM) and
amounts allocated to base memory, extended memory, and other (high) memory. RAM
is counted in kilobytes (KB: approximately one thousand bytes) and megabytes (MB:
approximately one million bytes).
RAM is the computer’ s working memory, where the computer stores programs and data
currently being used, so they are accessible to the CPU. Modern personal computers
may contain up to 64MB, 128MB, or more.
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Base Memory : Typically 640KB. Also called conventional memory. The DOS
operating system and conventional applications use this area.
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Extended Memory : Above the 1-MB boundary. Early IBM personal computers
could not use memory above 1MB, but current PCs and their software can use
extended memory.
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Other Memory : Between 640KB and 1MB; called High memory. DOS may load
terminate-and-stay-resident (TSR) programs, such as device drivers, in this area, to
free as much conventional memory as possible for applications. Lines in your
CONFIG.SYS file that start with LOADHIGH load programs into high memory.