ZiLOG System 8000 Hardware Reference Manual page 291

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cylinders, heads and sectors/track. During the
3tart-up procedure SMDMON attempts to select and
size each of the four possible SMD units. The
size parameters are stored in a table, and
~estored
whenever a SUNIT command changes the
current unit number. To override the drive size
parameters use the SORIVE command. New parameters
entered with the SDRIVE command are stored in the
~able.
Example: After SMDMON start-up, the drive
size parameters for unit# 0 are:
#cyls =
589,
#heads=7,
#Active sectors/track =
32
To override these values,
e~ter:
SDRIVE 600 8 34
The values 600,
8
and
34
are stored
in the drive-size table.
8) Format parameters are closely tied to drive-size
parameters~
Whenever the drive-size changes, the
format parameters are changed to make sense for
the new drive parameters. The format parameter
values are:
fmtsec = max sec
+
1
(total number of sectors/track,
including spare and bad sectors)
nsec = max sec
+ 1
(number sectors/track to be formatted
with FMT, FVOL or read with FRO
command)
fspare = max sec
(spare sector number)
fbad = ffffH
(bad sector number; defaults to an
invalid number, so there will not
be a sector flagged as bad during
FMT or FVOL commands)
Drive size parameters may change if:
1)
User enters a unit number (SUNIT).
2)
User enters new size parameters (SDRIVE).
3) User enters the SIZE command.
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