ZiLOG System 8000 - Page 308

HRM
Zilog
HRM
SSEC sets the current· sector number on the current
track if the parameter is given; otherwise, it shows
the current disk address.
SALL sets the current cylinder,
numbers, if parameters are given.
the current disk address.
head and
Otherwise,
sector
it shows
EXAMPLE:
SHEAD 5
SALL 300 4 23
SCYL
The first line sets the head number to S. The second
line sets the current disk address to: cyl=300, head=4,
sec=23 The third line shows the current disk addre3s.
It will be 300,4,23.
COMMAND: SDRIVE
SDRV
DESCRIPTION:
maxcyl maxhead maxsec /
maxcyl maxhead maxsec
If NO parameters appear, the current drive-size parame-
ters are displayed, and no valu~s are affected.
If any parameters are given, SDRIVE replaces the
default ~alues for the maximum numbers of cylinders,
heads, and active sectors/track to maxcyl, maxhead and
m~xsec. The format parameters: fmtsec, nsec, fspare
and fbad. are a1 so changed.
The commands that increment the disk address (ICYL,
IHEAD and ISEC) check against these values to prevent a
non-existent disk sector from being accidentally
addressed.
SDRV is a special abbreviation of SDRIVE.
EXAMPLE:
SDRIVE 1024 8 32
SDRV
The first line sets the drive-size' parameters for the
current unit to 1024 cylinders, 8 heds and 32 Active
sectors/track. The format parameters are also changed.
The second line does not change any values, but causes
SMDMON to display the current drive-size values.
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Zilog
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