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- DumbDrv
- Dummy DOS Device Driver
- Copyright (c) 1994-1996, Marcus Better
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- Version 1.10
- January 3, 1996
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- What is DumbDrv?
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- DumbDrv is a device driver which creates a null block device -
- a device that does absolutely nothing, except for occupying one
- or more drive letters. This can be useful if one wants to
- reserve a drive letter at boot time, so that another driver can
- use that drive letter. The KillDrv utility may be used to
- delete a DumbDrv device.
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- Here's an example where DumbDrv is useful: Let's say we have a
- hard disk called C:, a CD-ROM drive (accessed by MSCDEX.EXE),
- and a ramdisk created by RAMDRIVE.SYS. We now want the CD-ROM
- drive to be D: and the ramdisk E:. Since RAMDRIVE.SYS is loaded
- before MSCDEX.EXE, the ramdisk will automatically become D:,
- though. This is where DumbDrv comes in. By loading DUMBDRV.SYS
- just before RAMDRIVE.SYS, we reserve the drive letter D:,
- forcing the ramdisk to become E:. We can then delete the
- DumbDrv using the KillDrv utility, and load MSCDEX as D:
- instead.
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- Disclaimer and License Agreement
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- DumbDrv is supplied as is without any warranties, expressed or
- implied. The author assumes no liability for damages which may
- result from the use of DumbDrv.
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- You may copy DumbDrv on the following conditions: DumbDrv must
- be copied in unmodified form, and this documentation, also
- unmodified, must be included in the copy.
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- You may give DumbDrv to your friends or post it for downloading
- on bulletin boards only as long as the above conditions are
- met.
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- Installation
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- DumbDrv is installed by entering the line
- DEVICE=d:\path\DUMBDRV.SYS
- in your CONFIG.SYS file. The driver will be loaded the next
- time you boot your computer. DumbDrv will display a message
- saying what drive letters it occupies.
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- You may also specify the number of drive letters you want to
- reserve. To reserve three drives, use the line
- DEVICE=d:\path\DUMBDRV.SYS 3
- in your CONFIG.SYS. If you do not specify a number, the default
- value is 1. If you specify a number higher than the number of
- available drive letters, DumbDrv will use all available drives.
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- NOTE: Drive letters are assigned to block device drivers
- sequentially in the order they are loaded in CONFIG.SYS.
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- Contacting the author
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- You are welcome send me any ideas, comments and suggestions for
- DumbDrv. If you have found any bugs, please let me know. My
- email address is
- Marcus.Better@abc.se
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