Radio Shack TRS-80 model III Owner's Manual page 62
Mini-disk operation,
trsdos disk operating system,
disk basic programming language
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Also See for TRS-80 model III:
- Operation and reference manual (274 pages) ,
- Service manual (135 pages) ,
- Operation manual (30 pages)
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TRSDOS
MASTER
Set
Master Read/Write
Drive
MASTER
(DH1Vi
=
a)
a
is
the drive
specification.
If
omitted Drive
is
set
as
the
master
drive,
This
command
allows
you
to
assign a
specified drive as the
Master
Read
or
Write
drive
in
the
system.
When
searching
for a
file,
trsdos
will
start
with
the
master
drive.
If
the
file is
not
found on
the specified drive,
trsdos
will
continue searching
on
the
next
higher-numbered
drive.
Example
After
you
enter the
command: MASTER
(DRIVE
=
i)
Drive
1
becomes
the
master
drive.
PATCH
Change
the
Contents
of
a Disk
File
^k^p'Ui^=
:
^a
K
fmn
=
bb,cm
-
cc)
///^ is
the
file
specification
add
-aaaa
specifies the
address
at
which
the data
is
found,
aaaa
is
a
four-
digit
hexadecimal number.
find
~bb
specifies the
string
you wish
to find
(or
compare
to),
bb
is
a
hexadecimal sequence.
chg
=
<#
specifies the
new
contents
for
the
byte(s).
cc
is
a
hexadecimal
sequence.
Note: This
utility is
for
machine
language programs
only.
55
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