The only time you need to use
this command line switch is if you have an older DOS application, very likely a game or graphics
application, that relies on XMS memory. The application will very likely display a nebulous error
message that specifically mentions the Interrupt 15h interface. Make sure you set the amount of
XMS memory to 64 KB larger than the amount required by the application. You can specify any
value from 64 KB to 65,535 KB. However, you can??™t specify more memory than your system has
installed. When you specify a value less than 64, HIMEM.SYS sets the value to 0. The default value
is 0.
STARTING THE COMMAND INTERPRETER 109
/NUMHANDLES=n Specifies the maximum number of Extended Memory Block (EMB) handles
that the system can use simultaneously. Every time an application requests more memory, it
needs a handle to access that memory. Generally, you don??™t need to provide this command line
switch unless you have an older graphics-intensive application. You can specify a value from
1 to 128. The default setting is 32, which is more than enough for most applications. Changing
the number of handles uses more memory for housekeeping chores, so you??™ll want to use this
command line switch with care.
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