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-
-
- INSIDE THE 1571 DISK DRIVE
- by
- Robert W. Baker
-
-
- COMMODORE MICROCOMPUTERS MAGAZINE
- May/June, 1986
- p.108
-
-
- This utility was designed to
-
- give you the most out of the
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- Commodore 1571 disk drive, C-128
-
- combination, but it works equally
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- well as a handy utility program for
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- 1541 drive and C-64. The easy to
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- use, menu-driven program has
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- functions that let you lock and
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- unlock files, change the disk name,
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- and issue disk commands.
-
-
- But the main feature of the program
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- is the expanded disk directory
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- provided by the first two functions.
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- These functions will identify the
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- files on the second side of a double
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- sided diskette-- letting you know for
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- sure which files on a double-sided
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- diskette may be used on a single-sided
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- drive.
-
-
- When you are running this program,
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- be sure that you select a function
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- from the main menu only after you
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- have the correct disk in the drive.
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- If you do not have a disk in the
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- drive, you will get an error message
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- and be prompted to press any key.
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- Pressing a key any time you receive
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- an error message will abort the
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- function and return you to the main
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- menu.
-
-
- NORMAL and FULL DIRECTORY
-
-
- Before these two options display
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- the disk directory, you are first
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- given the option of making a printout
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- of the disk information. Respond with
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- a (Y)es or (N)o. The program then
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- displays the disk name and I.D., the
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- format, number of blocks free, and
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- whether the disk was formatted as a
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- single or double-sided disk.
-
-
- The NORMAL DIRECTORY function will
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- display only the active files on a
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- disk (those that have not been
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- deleted). The FULL DIRECTORY function
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- will display everything, including
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- deleted files.
-
-
- These functions will also display
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- whether a file is "locked" (L), open
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- (O), or utilizes tracks 36 through
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- 70 (2). With a locked file, a special
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- bit, or flag, is set that prevents
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- that file from being scratched, or
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- erased.
-
-
- If you are making a printout of the
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- directory, pressing any key will halt
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- the printing. Pressing a key again
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- will resume printing. Pressing "Q"
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- will end the printout and return you
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- to the main menu.
-
-
- LOCK/UNLOCK FILE
-
-
- This function allows you to lock or
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- unlock any file on the disk. When
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- you are prompted, enter the file name
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- of the file you want to update. Once
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- the file is found, the usual directory
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- information is displayed. Then you
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- are asked to confirm that you want
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- the locked/open status of the file
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- switched. Respond with a (Y)es or
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- (N)o. A "N" will abort the function
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- without changing the directory.
-
-
- Note that if the file is not
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- properly closed, the lock flag cannot
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- be modified, which will be indicated
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- by an error message.
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-
- CHANGE DISK NAME
-
-
- This function allows you to change
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- the 16-character disk name. After
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- the usual disk information has been
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- displayed, you will be promted to
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- enter the new name (under
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- 16-characters long.) Pressing RETURN
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- without entering anything will abort
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- this function. Also note that this
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- utility will not change the disk I.D.
-
-
- ISSUE DISK COMMAND
-
-
- If you are running this program on
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- a 1541 disk drive, this is your last
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- available function. It allows you to
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- send commands directly to the disk
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- controller. When prompted, enter the
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- command you want, enclosed in quotes,
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- and in the proper command format.
-
-
- If you are running this program on
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- a 1571 disk drive, you have another
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- option on the main menu. This option
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- allows you to switch the drive from
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- single to double-sided mode and vice
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- versa.
-
-
- QUIT
-
-
- This function will terminate the
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- program.
-
-
- For more information on this
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- utility program and the ins and outs
-
- of the 1571 drive itself, consult
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- Baker's tutorial in the COMMODORE
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- MICROCOMPUTERS MAGAZINE,
-
- May/June,1986.
-
-
- FILES REQUIRED:
-
- INSIDE THE 1571
-
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