Midway 4-Player 25" Dedicated Video Game, Operation Manual

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Diagnostic, Audit & Adjustment Menu System for NBA 4-8
Main Menu (continued)
Diagnostics Menu (continued)
Disk Tests Menu
DISK TESTS
Select DISK TESTS at the Diagnostics Menu. Disk Tests allow you to verify proper operation of the hard
disk drive assembly.
Highlight an option with any player panel joystick. Select the option with any player panel button.
DISK TESTS
DISK INFORMATION
SEQUENTIAL READ
SEQUENTIAL CACHE READ
RANDOM READ
RANDOM CACHE READ
DATA INTEGRITY TEST
FILE SYSTEM CHECK
SURFACE SCAN
EXIT
DISK TESTS MENU
Disk Information. The Disk Information routine verifies the interface between the CPU Board Assembly
and hard disk drive. The processor requests disk information. Data cannot be retrieved successfully if
there is a problem.
Sequential Read. This routine tries to access every bit of data in the order it is stored directly on the disk.
The hard disk drive media may be defective if this routine cannot be completed successfully.
Sequential Cache Read. This routine tries to access every bit of data in the order it is stored in the
temporary disk memory cache. If this test is not successful, the memory circuits may be faulty.
Random Read. This routine tries to access every bit of data in no particular order directly from the disk.
This test may detect problems with ability to position the drive heads accurately over the requested data.
Random Cache Read. This routine tries to access every bit of data in no particular order from the
temporary disk memory cache. If the cache fails this test, memory circuits may contain a fault.
Data Integrity Test. This test analyzes the data on the disk drive. The test determines if corrupted data is
on the disk. Bad data can cause the program to falter even though the hard disk operates correctly.
File System Check. This routine performs a file-by-file check of the data stored on the hard disk.
Surface Scan. The magnetic material on the disk can become damaged, causing data to be unreadable.
This routine locates unusable areas on the disk and marks them for future reference.