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- UD -- UNLOCK DIRECTORY By WESLEY HOWE
- UD is a 108-byte Assembly-language program to unlock the current
- Directory and set it to the root of the filing system (the boot disk). UD
- was written to overcome the problem where the CD command attaches to a disk,
- rather than a device.
- It is most useful on single-drive systems, where swapping disks can
- become a problem. For example, if you use CD on a single drive system even
- once, you must use it each time you change the disk in DF0: or the system
- will keep asking for the old disk by name.
- On two-drive systems, it is often more convenient to move the bootdisk
- to DF1: and change disks in DF0:. If you use CD to inspect a directory, then
- use CD DF0: to get out, you will need to use CD DF0: each time you want to
- change the disk in DF0:. I find that cumbersome and inconvenient.
- Enter UD. After using the CD command, UD will set the current directory
- to the disk drive DF0:, not the volume in DF0:. This is the way the system
- defines the current directory after a reboot prior to ever using the CD
- command.
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