Advertisement
COPY COMMAND
7.2 -- User-Derined Devices
It
may
be
necessary
to
set
breakpoints
in
the
.-"""",
user-defined device driver
to
ensure
that
it
is
working
.
)
properly.
The
tiM
It
option
will
cause the
COPY
command to
enter the debug monitor after
the
device
driver
has
been
loaded into memory.
This reature is especially useful during
the initial
testing of
the ,device driver.
The 18M'" option
cannot
be used without
the
"Dn
option.
If
the "M" option is present,
the debug monitor will
display
one
Or
the Following messages depending on the version
or
the
EXbug
firmware.
The first message is displayed
by
EXbug 11
the second
by
EXbug 2:
BKPT ERROR
P-2126 X-2161 A-OD B-80 C-CO S-226F
SWI P-2126 X-2161 A-OD B-SO C-CO S-226F
*E
These messages indicate that the user-defined
device
driver
has
Just
been loaded into memory.
The actual numbers in the
pseudo-registers may dirrer
and
are
inconse~uential.
The
purpose of going to the debug monitor is to allow the user to
set
bl''aakpoints. at critical
places in
t.he
device
drivel'
to
vel'if~
that
it
is working
p~operly.
After the breakpOints
are
set~
control- is
.returned to the
COpy
command
by
entering
the
EXbug
command
i
P
Then}
when
the user-defined device driver is accessed
bq the
COPY
command,
the set breakpoints
will
allow
the
user
to
check
the
device driver;s Functions_
7.3 COpy Mode Summary
The
following table summarizes the requirements for the
three COpy command modes.
The following symbols are used
in
the table:
Stjmbol
OK-OK
DK-DV
DV-DK
R
a
F
o
Meaning
Oiskette-to-diskette copying
Diskette-to-device copying
Oevice-to-diskette copying
Req,uil'ed
Optional
File name
Device name
.--/
Page
07-08
Advertisement
