ZiLOG System 8000 - Page 303

HRM
Zilog
HRM
COMMAND: RCYL / RHEAD / RSEC / RALL
DESCRIPTION:
RCYL randomizes the current disk cylinder number to a
number between 0 and maxcyl-1, inclusive.
RHEAD randomizes the current disk head number to a
number between 0 and maxhead-1, inclusive.
RSEC randomizes the current disk sector number to a
number between 0 and maxsec-1, inclusive.
RALL randomizes the current disk address. cyl, head
and sec are all ra~domized as if the user had entered
RCYL, RHEAD and RSEC commands.
EXAMPLE:
RCYL
Assuming maxcyl = 589, this command sets cyl to a value
in the range (0, 588).
COMMAND: READ
RD
DESCRIPTION:
rseg roff Inth cyl head sec
rseg roff Inth cyl head sec
Issues the READ packet command. The read buffer begins
at <rseg>roff. The disk address that will be read is:
cyl, head, sec. Inth bytes will be read.
RD is a special abbreviation for READ.
EXAMPLE:
'READ 1 0 200H 5 2 0
reads 512 (200 Hex) bytes into memory beginning at
<1>0, from cylinder# 5, head# 2, sector# O.
COMMAND: RLONG rseg roff Inth cyl head sec
DESCRIPTION:
Issues the RLONG (read long) packet command. The read
buffer begins at <rseg>roff. The disk address that
will be read is: cyl, head, sec. Inth bytes will be
read.
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Zilog
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