User guide

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1 - If the bad sector is in the system or directory area of the disk, an error message will be
displayed on the console warning the user of a bad system or directory sector.
2 - If the bad sector is in the file area of the disk, an error message will be displayed giving the
number of the CP/M allocation block containing the bad sector. That block will then be allocated to
the file (UNUSED).BAD so that it cannot be used by any other file operations. If the bad sector
is already allocated to a file, it is NOT UN-allocated from the file, so that all remaining sectors
of the file can still be read.
It is a good idea to run FBAD on a regular basis to keep track of the integrity of your disks.
Should FBAD locate a bad sector on a system track, that disk will not be bootable, and cann ot be
SYSGENed, but should be otherwise usable. Should FBAD locate a bad directory sector, ALL files
should be IMMEDIATELY copied to another disk, and the bad disk (in the case of a floppy) should be
discarded. Bad sectors in the file area of the disk can be left allocated to the file
(UNUSED).BAD, with no ill effects. However, any disk which shows a large number of bad sectors
should be discarded.
It is very strongly recommended that FBAD be run on the CP/M Winchester partitions right after
FORMATting the first time (this has already been done by us before shipping - do it again if you
change partitions or re-FORMAT) to lock out any bad sectors that may be present. This will
prevent many future headaches. It is very improbable that any Winchester will have no bad
sectors, because of the large number of sectors on a Winchester. A few bad sectors are no
cause for alarm. If the number is considerable, however, contact Quikdata for advice. Note that
the QSFORMAT utility also has a "media check" incorporated into it. When first run, choose the
media check option, and don't worry about FBAD. FBAD is mainly for media already formatted, to
be checked sometime after the FORMAT has been done.
ZCPR is the Z-80 Console Command Processor prepared by members of the CP/M Users Group. It is a
greatly enhanced CCP containing all of the features of the Digital Research CCP, as well as several
new ones. The commands available are:
Familiar Commands: New Commands:
DIR GO
ERA GET
REN USER JUMP DFU
TYPE SAVE LIST
The "Familiar Commands" operate in exactly the same manner as with the standard CCP, with the
following exceptions: