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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*
Tests the keyboard controller
Tests the scan codes assigned
to the keys
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
l Test appears only if you have installed a color monitor.
Performing System Diagnostics
B-11