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Text File | 1993-09-19 | 2.3 KB | 47 lines | [TEXT/ttxt] |
- TechTool is a small utility which automates two tasks Macintosh users often
- need to perform:
-
- * Rebuilding the desktop
- * Zapping the PRAM.
-
- While TechTool makes these tasks easier by allowing the user to perform them
- without memorizing cryptic keystrokes, it also accomplishes these tasks better
- than with traditional methods.
-
- Desktop Rebuild:
- Rebuilding the desktop is often necessary when documents fail to launch after
- double-clicking, or when custom icons are unexpectedly replaced with generic
- document or application icons. Traditionally, holding the option and command
- keys before the Finder loads will force the invisible desktop file to "rebuild"
- itself. Quite often, this is not completely effective because the original
- desktop file was corrupted, so rebuilding it only yields an updated desktop
- file which is still damaged.
-
- TechTool provides a better solution to rebuilding the desktop. It actually
- deletes the original desktop. The next time the Finder loads, it will create a
- brand new desktop file.
-
- Zap the Parameter Ram:
- The parameter RAM (PRAM) contains user-definable settings that must be retained
- after the computer has been deactivated. Settings such as time of day, mouse
- scaling, keyboard repeat rate, and startup drive preferences are all stored in
- the upper 64 bytes of PRAM. Traditionally, one could clear or "zap" these upper
- 64 bytes of PRAM by holding a special key combination at startup or before
- selecting the control panel. This often cured behavioral anomalies which could
- not be remedied with software replacement.
-
- Below the standard 64 bytes of PRAM lies another 192 bytes of memory which are,
- for the most part, publicly undocumented. These are secret storage areas that
- Apple uses for such things as Manufacture Date and Factory Service settings.
- When these portions of the PRAM become corrupted with invalid data, odd
- problems can occur and sometimes the machine will fail to work at all.
- Traditional PRAM zapping does not clear the lower 192 bytes of PRAM. The only
- alternative is to remove the PRAM battery, which is often soldered to the logic
- board. TechTool clears all 256 bytes of PRAM memory without the need to remove
- the battery. Once the system is rebooted, the Macintosh ROMs will replace the
- PRAM contents with its default or factory settings.
-
- Revision 1.0.3 displays the date the computer was manufactured and the total
- hours of use.
-
-