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MEMSIZE.TEC
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1990-10-08
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ID:MS Memory Size Field Explanation
Quarterdeck Technical Note.
By Joe Wilder
The Memory Size (in K) option is a number set to allow DESQview
the opportunity to tell the user whether there is enough memory
to open a particular program. That is to say, DESQview compares
the number in the Memory Size (in K) field to the Largest
Available fields (conventional and expanded) in Memory Status
(which varies according to which and how many programs are
running). If the Memory Size in K field is larger than BOTH
conventional and expanded Largest Available, DESQview puts a
message on the screen telling the user there is not enough memory
to open that window. At this point DESQview hasn't even tried to
open the program. It's just telling the user there's not enough
memory according to the user's specification to try to run the
program. This is useful to prevent a program from attempting to
run and then freeze for lack of available memory. Note: Programs
running under DESQview require between 9K - 14K extra memory for
DESQview to manage their windows.
The Maximum Program Memory Size (in K) is the amount of memory
which DESQview will try to acquire for the particular program.
If this number is higher than the Largest Available fields in
memory status (both conventional and expanded), DESQview will
acquire every last byte that is available in the partition it
chooses to use whether the program needs that much memory or not.
If there is ample memory on the computer you might want to set
Maximum Program Memory Size to some very high number that you
know is beyond what is actually available. This, of course, may
not be desirable for people with machines with limited memory who
are trying to multitask a couple of small programs. They may
want to try to squeeze multiple small programs into the first
partition, which would be completely used up if the first
program's Maximum Program Memory Size (in K) was set higher than
necessary.
Maximum Expanded Memory Size (in K) is used to limit a program by
the amount of expanded memory it may use. If Maximum Expanded
Memory Size is left blank, a program may take or leave as much
expanded memory as it wants. If a number is put in this field,
the program may take as much memory as it wants up to that
number. If a program doesn't use all the Expanded memory
allocated by this field, the rest is still available for other
uses. This is especially useful for running programs that grab
all of the expanded memory available, leaving nothing for other
uses. This convention is not to be confused with the usage of a
blank with the Maximum Program Memory Size (in K). In the case
of Maximum Program Memory Size, a blank means this field will
default to the number in Program Memory Size (in K).
Copyright (C) 1990 by Quarterdeck Office Systems
* * * E N D O F F I L E * * *