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- From: Apgar@Apple.com (Gar)
- Newsgroups: comp.sys.mac.system
- Subject: Re: How do you zap PRAM under Sys7?
- Message-ID: <Apgar-200892183052@17.32.32.76>
- Date: 21 Aug 92 01:41:45 GMT
- References: <1992Aug13.153842.302@uunet!tellab5!odgate> <1992Aug15.190436.3362@ccu.umanitoba.ca> <22521@sybase.sybase.com>
- Sender: news@pcnntp.apple.com
- Followup-To: comp.sys.mac.system
- Organization: Apple
- Lines: 96
-
- In article <22521@sybase.sybase.com>, bill@kirkwood.sybase.com (Bill
- McFarland) wrote:
- >
- > What is parameter RAM, why would one "zap" it (what does "zap" mean?), how
- > do you know if you need to zap it?
-
-
- With the exception of Date and Time, all system-wide preferences are reset
- to
- default values by zapping parameter RAM (PRAM). To zap PRAM under System
- 7,
- hold down the Command-Option-p-r keys during startup (Make sure the Caps
- Lock key is up!). The Macintosh will restart shortly after displaying the
- "Welcome to Macintosh" screen, which indicates that PRAM has been reset.
- The Date and Time settings are actually read out of PRAM before it is
- zapped,
- then written back in afterwards. Note that if a MacintoshUs battery is
- drained, the date and time are reset to the default value (12:00 am,
- January 1, 1904) after each startup.
-
- System Preferences Stored in PRAM
- ---------------------------------
- The following are system-wide preferences that may affect all applications:
- * 32-bit Addressing (Memory Control Panel)
- (default: 24-bit addressing)
- * Brightness settings (Brightness Control Panel)
- (default: mid-range on the slider)
- * Highlight Color (Color Control Panel)
- (default: black)
- * Cursor blink rate (General Control Panel)
- (default: middle setting)
- * Menu blink count (General Control Panel)
- (default: 3 times)
- * Date, Time and displayed format (General Control Panel and Alarm DA)
- (default: 12:00 am, January 1, 1904)
- * Keyboard Repeat Rate and Repeat Delay (Keyboard Control Panel)
- (default for repeat: one away from Fast)
- (default for delay: one away from Long)
- * Disk Cache size (Memory Control Panel)
- (default: 16K)
- * Monitor Settings and Location of extra monitors (Monitors Control Panel)
- (default: primary monitor only, set to Black & White)
- * Mouse Tracking and Double-click Speeds (Mouse Control Panel)
- (default for tracking: Very Slow)
- (default for double-click: Middle setting)
- * Beep Sound (Sound Control Panel)
- (default: Simple Beep, even though it is not highlighted)
- * Startup Disk Choice (Startup Disk Control Panel)
- (default: none set, will use standard volume search method)
- * Default application font is reset to Geneva.
- * Serial port speeds for printer and modem ports are reset to 9600 bps.
- * AppleTalk active/inactive (Chooser)
- (default: AppleTalk is active.)
- * Selected network (Network control panel)
- (default: Built-in LocalTalk port is selected)
- * Macintosh IIfx serial port (IIfx Serial Switch Control Panel)
- (default: Faster is selected)
- * Macintosh Quadra 68040 CPU cache (Cache Switch Control Panel)
- (default: Faster is selected)
- * Macintosh Portable speaker is reset to more audible volume.
- * Macintosh Quadra/Powerbook RAM Disk (RAM Disk Control Panel)
- (default: RAM disk is off, size is set to 192K)
-
- Finder Preferences
- ------------------
- The following are Finder-specific preferences (Note that some preferences
- affecting portions of the user interface extend to other applications,
- such as window title shading.):
- * Font used for Finder views (Views Control Panel)
- (default: Geneva 9)
- * Icon Alignment Settings for Finder (Views Control Panel)
- (default: straight grid, "Always snap to grid" deselected)
- * Icon List View Settings for Finder (Views Control Panel)
- (default: smallest icon; display sizes, kinds, labels, and dates;
- Deselect "Calculate Folder Sizes" and "Show Disk Info in Header")
- * Trash Can warning dialog (setting in Get Info for the Trash Can)
- (default: warn before emptying)
-
- With the exception of virtual memory, these parameters may be reset by
- deleting the Finder Preferences file, which is located in the Preferences
- folder inside the System Folder. Since System 7 will not allow this
- file to be modified if it is on the startup disk, you will need to disable
- it instead. To do this, drag the Finder Preferences file out of the
- Preferences folder and restart the Macintosh. System 7 will create a
- new Finder Preferences with default values automatically. You may
- then delete the old Finder Preferences file.
-
- NOTE: The Virtual Memory, File Sharing and Window Color settings are
- stored with their respective Control Panel files and cannot be reset
- using these methods. Virtual Memory and File Sharing can be temporarily
- disabled, however, by pressing the Shift Key while starting the Macintosh
- Hold the key down until "Extensions Off" appears in the "Welcome to
- Macintosh"
- screen.
-
- Apgar@Apple.com I said it, NOT Apple.
-