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ROLLOUT COMMAND
23. 1 -- Use
The
ROLLOUT
command
cannot
be
invoked from within a
-\
CHAIN file (Chapter 6).
Since most of the processing is done
by
a position-independent routine that must work without
MDOS
being resident,
the resident
MDOS
lID
functions
cannot
be
use d .
Th
ere
for
e
I
the
s pee i a 1
key boa r d
key
s C TL - X
I
C TL - D
I
CTL-W,
BREAK,
and
RUBOUT
are
non-functional
during
the
ROLLOUT
command;
however,
each operator response must still
be terminated with a carriage return.
Caution must be used when writing out blocks
of
memory
that
include
the
highest
addressed memory location $FFFF.
Since
MDOS
can only load programs
in
a
multiple
of
eight
bytes,
the starting load address of such programs must be an
add res s t
hat
i s a mu
1
tip
1
e
0
f
e
i
9 h
t.
0
the r
us
i
s e
I
the
end in g
load address will be greater than
$FFFF.
23. 1. 1
User Memor'J Map
When
the
ROLLOUT
command
is invoked with the command
line
ROLLOUT <name).;U
the
memo~y
~rom
the UseT Memory Map of an
EXORcise~
II
s~stem
ulith
the dual memory' map configured will be written into the
di,kette file
<name~
on tha specified logical unit.
If
the
dual
memor'J
map
is
not configured, ROLLOUT will terminate
after
displa~ing
the following message:
USER MEMORY MAP NOT CONFIGURED
If the dual memory map is configured,
then
ROLLOUT
will
continue and display the messages
ST ART ADDRESS:
END ADDRESS:
The
user responds
by
entering the starting and ending
memor~
addresses in the
Use~
Memor~
Map which are to be written into
the
diskette
file.
The
addresses
must
be
input
in
hexadecimal ($OOOO-FFFF),
and the starting
address
must
be
less
than
or
equal
to
the
ending address.
If these two
conditions are not met,
the message
INVALID
ADDRESS RANGE
will be displayed and the
operator
will
be
given
another
chance
to
enter
the
addresses.
After having supplied the
memory range to
be
written to diskette,
the message
ARE YOU SURE (V, N,
Q)?
will be displayed.
The operator must respond with a
"Y"
to
!
--I
Page
23-02
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