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System diagnostic tests (continued)
Component Tests
Hard disk
Hard disk format
drives
Media analysis
Performance
Seek
Read/verify
Check test cylinder
Force bad tracks
Function
See “Hard Disk Diagnostics”
Floppy disk
Diskette format
See “floppy Disk
drives
Drive speed
Diagnostics’
Random read/write
Sequential read/write
Disk change line
Keyboard
Video
Controller
Scan/ASCII code
Keyboard clock line
Keyboard data line
Adapter
Attribute
80 x 25 display
40 x 25 display*
320 x 200 graphics*
640 x 200 graphics*
Page selection’
Color
l
Tests the keyboard controller
Tests the scan codes
assigned to the keys (see
“Keyboard Scan/ASCII
Codes”)
Tests the keyboard clock line
Tests the keyboard data line
Tests the display adapter
memory
Tests the display adapter
attributes
Tests the 80 x 25 display
Tests the 40 x 25 display
Tests the 320 x 200 graphics
display
Tests the 640 x 200 graphics
display
Tests the paging function of
the adapter
Tests the background and
border color mapping
+
Test appears only if you have installed a color monitor.
Perfming System Diagnostics
C-11