75 lines
2.6 KiB
Plaintext
75 lines
2.6 KiB
Plaintext
=============================================================================
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AST RESEARCH, INC. TECHNICAL BULLETIN #0428B 04-04-90
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=============================================================================
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PREMIUM/286 AND 386 THIRD FLOPPY SUPPORT
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The following summarizes installation considerations for a third floppy device
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in AST Premium Computers:
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PREMIUM/286 HARDWARE CONSIDERATIONS
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PREMIUM/286 systems equipped with part number 202143-003 or 202143-004 system
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boards include embedded diskette drive controller circuitry that allows
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support for a third floppy device. The third floppy is connected to the 34
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pin connector on the system board with an additional floppy drive controller
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cable (AST part number 220085-001). The cable is attached to the third floppy
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device and the 34 pin connector J20 on the system board.
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PREMIUM/386 HARDWARE CONSIDERATIONS
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All PREMIUM/386 system boards are built with embedded third floppy diskette
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control circuitry. The same cable (AST part number 220085-001) is required to
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install the third floppy device. This cable connects to the P4 connector on
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the 386 system board.
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SOFTWARE CONSIDERATIONS
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Because the third floppy device is not directly recognized by the system BIOS,
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two device drivers, DRIVER.SYS and ASTDSK.DRV, must be inserted into the
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CONFIG.SYS file.
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DRIVER.SYS is provided with MS-DOS Version 3.3 Release 1.3 and ASTDSK.DRV is
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provided on the AST Utilities diskette shipped with all PREMIUM systems.
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DOS VERSIONS
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AST recommends and supports the use of AST MS-DOS Version 3.3 Release 1.3.
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For best results, users of earlier DOS versions should upgrade to Version 3.3
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Release 1.3. Contact your local AST Service Center for additional
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information.
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INSTALLATION
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The AST Utilities Diskette provides menu-driven automatic installation of the
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third floppy device drivers into the CONFIG.SYS file. The following are the
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configuration commands for each of the possible hardware combinations.
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The commands listed below are supported under DOS Version 3.2 and 3.3 unless
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otherwise noted:
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For 360 KB drive (5.25-inch diskettes)
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DEVICE=C:\DOS\ASTDSK.DRV 0
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DEVICE=C:\DOS\DRIVER.SYS /D:2 /F:0
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For 720 KB drive (3.5-inch diskettes)
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DEVICE=C:\DOS\ASTDSK.DRV 2
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DEVICE=C:\DOS\DRIVER.SYS /D:2 /F:2
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For 1.2 MB drive (5.25-inch diskettes)
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DEVICE=C:\DOS\ASTDSK.DRV 1
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DEVICE=C:\DOS\DRIVER.SYS /D:2 /F:1 /S:15
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For 1.44 MB drive (3.5-inch diskettes)
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DEVICE=C:\DOS\ASTDSK.DRV 3
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DEVICE=C:\DOS\DRIVER.SYS /D:2 /F:7 /S:18
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(use /F:3 for DOS 3.2)
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