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BBS in a Box - Macintosh - Volume VII (BBS in a Box) (January 1993).iso
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Memory Tips for System 7.0
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Tips For Using Memory Efficiently
If you’re having problems opening application programs or printing, these tips
will help you avoid problems by using your computer’s memory more efficiently.
To use System 7, your Macintosh needs at least 2 megabytes of memory. If you
customarily work with several programs at a time, you may wish to install more
memory. For more information about managing your computer’s memory, see the
Macintosh User’s Guide.
Use the Available Memory
Sometimes when you try to open a program, you’ll see a message asking if you’d
like to open the program using the available memory. Don’t worry. This message
appears when the available memory is greater than the minimum memory required
to open the program, but less than the recommended amount of memory. When you
see this message, click OK, and the program will open. In rare cases, you may
be unable to use some features of the program, but usually you’ll be able to
use the program without a problem.
Quit Some Open Programs
When you try to open a program you may see a message that there’s not enough
memory available to open the program. This message appears when the available
memory is less than the minimum required to open the program. When you see the
“not enough memory” message, you should quit one or more open programs. You can
see which programs are open by pulling down the Application menu.
Reduce a Program’s Memory Size
You can often avoid memory problems by reducing a program’s “appetite” for
memory. (In rare cases, reducing a program’s memory size causes performance
problems, but usually you’ll be able to use the program without a problem.)
To reduce a program’s memory size, first quit the program. Then select the
program’s icon and choose Get Info from the File menu. The program’s Info
window appears. After setting the memory size, close the Info window and try
opening the program again.
Quit Some Programs Before Printing
Sometimes when you try to print, you’ll see the Application menu begin to
blink. When this happens, you need to quit a program to make more memory
available for printing. First, choose Finder from the Application menu. You’ll
see the alert box shown below. Click OK to close the alert box. Next you
should quit one or more open programs. To quit a program, make it active by
choosing it from the Application menu, then choose Quit from the File menu.
After quitting some programs, try printing again.
Set the Disk Cache to the Smallest Size
The disk cache is a portion of the computer’s memory set aside to limit how
often the computer must read from a disk––thus speeding the computer’s
performance. By reducing the size of the disk cache, you can make more memory
available for application programs. To adjust the disk cache, open the Memory
control panel. (Choose Control Panels from the Apple menu, then double-click
the Memory icon to open it.) In the Memory control panel, click the down arrow
repeatedly until the disk cache is the smallest possible size. Finally,
restart your computer (by choosing Restart from the Special menu.)
Drag Optional System Extensions Out of the System Folder
System extensions (also known as INITs) compete with application programs for
memory. (System extension icons are often displayed in the bottom-left portion
of the screen when the computer is starting up.) You’ll find system extensions
in the Extensions folder, which is in the System Folder. You can conserve
memory by removing system extensions that you don’t need. For instance, if your
Macintosh is not connected to a host database, you can remove the DAL (Data
Access Language) system extension. Likewise, if your Macintosh is not connected
to a network, you can remove the AppleShare system extension. To remove a
system extension, drag its icon out of the System Folder to another location on
your hard disk, then restart the computer.
Restart the Computer.
If you have opened and closed a number of programs, your Macintosh memory can
become fragmented so that you can’t open a large program. You can alleviate
this problem by quitting all the programs you have open, and restarting the
computer.
Turn Off Background Printing
When background printing is turned on, you can print while using the computer
for other work. If you don’t need background printing, you can reduce the
amount of memory required to print by turning background printing off. To turn
off background printing, choose the Chooser from the Apple menu. In the Chooser
window, select a LaserWriter icon and click the button labeled “Background
Printing: Off.”
Turn Off File Sharing
When file sharing is turned on, you can share information on your computer’s
hard disk with other users on a network. If you are not currently using file
sharing, you can conserve memory by turning file sharing off. To turn off file
sharing, open the Sharing Setup control panel. (Choose Control Panels from the
Apple menu, then double-click the Sharing Setup icon to open it.) In the File
Sharing section of the Sharing Setup control panel, click Stop. A message
appears asking how many minutes the computer should wait until file
sharing is turned off. Type a number, then click OK.
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