System diagnostic tests (continued)
Component | Tests | Function |
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Memory | Walking 0 | Checks data lines for shorts |
(continued) |
| and bits that are 0 |
| Address | Checks for address line shorts |
| Refresh | Checks the refresh interval |
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Hard disk drives | Hard disk format | See ‘Hard Disk Diagnostics’ |
| Media analysis |
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| Performance |
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| Seek |
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| Read/verify |
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| Check test cylinder |
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| Force bad tracks |
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Floppy disk | Diskette format | See ‘Floppy Disk Diagnostics’ |
drives | Drive speed |
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| Random read/write |
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| Sequential read/write |
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| Disk change line |
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Keyboard | Controller | Tests the keyboard controller |
| Scan/ASCII code | Tests the scan codes assigned |
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| to the keys |
| Keyboard clock line | Tests the keyboard clock line |
| Keyboard data line | Tests the keyboard data line |
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Video | Adapter | Tests the display adapter |
|
| memory |
| Attribute | Tests the display adapter |
|
| attributes |
| 80 x 25 display | Tests the 80 x 25 display |
| 40 x 25 display’ | Tests the 40 x 25 display |
| 320 x 200 graphics’ | Tests the 320 x 200 graphics |
|
| display |
| 640 x 200 graphics* | Tests the 640 x 200 graphics |
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| display |
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* Test appears only if you have installed a color monitor.
Performing System Diagnostics |