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3.2 Power-On Self-Test (POST)
|The POST is initiated automatically each time the system power is turned
|on.
|The POST is a series of system checks and initializations that verify the
|correct operation of the system unit. The POST tests only those areas
|that allow the system to be operational enough to run advanced
|diagnostics. The POST can detect two types of errors: critical and
|noncritical.
|Critical errors prevent the system from operating or cause incorrect
|results that are apparent to the user. Examples of critical errors
|include microprocessor or interrupt-controller errors. If the POST
|detects a critical error, the microprocessor attempts to display the error
|and all testing stops.
|Noncritical errors cause incorrect results that might not be apparent to
|the user. An example of a noncritical error would be a serial
|communications failure. If the POST detects a noncritical error, all
|testing stops and the microprocessor displays an error code. Pressing the
|F1 key allows testing to continue.
|When the Reference Diskette is in drive A, and a noncritical error is
|detected, the system displays the POST error message along with a message
|generated from the Reference Diskette. The Reference Diskette message
|instructs the user to take a specific action to correct the error.
|After a successful POST, one short beep occurs. Control is then given to
|a BIOS routine called the system bootstrap loader. The bootstrap loader
|attempts to load an operating system or a program from either a diskette
|or the fixed disk drive. If neither is present in the system, the Insert
|Diskette icon is displayed (see the &dia. pamphlet in this manual). This
|icon indicates that a diskette should be inserted into drive A. After the
|diskette is inserted, press the F1 key to resume operation. If the F1 key
|is pressed when no diskette is in the diskette drive, the IBM Cassette
|BASIC screen appears.
IBM PS/2 Model 65 SX HMR
Power-On Self-Test (POST)
3.2 - 1
Содержание PS/2 65 SX
Страница 38: ...7 2 1010 Cover Lock Cover 1005 PICTURE 5 IBM PS 2 Model 65 SX HMR 1010 Cover Lock 7 2 1 ...
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