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Roland M-GS64

Roland M-GS64
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*
The
size
of
the
requested
data
does
not
indicate
the
number
of
bytes
that
will
make
up
a
DTI
message,
but
represents
the
address
fields
where
the
requested
data
resides.
Some
models
are
subject
to
limitations
in
data
format
used
for
a
single
transaction.
Requested
data,
for
example,
may
have
a
limit
in
length
or
must
be
divided
into
predetermined
address
fields
before
it
is
exchanged
across
the
interface,
The
same
number
of
bytes
comprises
address
and
size
data,
which,
however,
vary
with
the
Model
ID.
“The
error-checking
‘process
‘uses
a
checksum
‘that
‘provides
a
bit
paltern
where
the
last
7
bits
are
zero
when
values
for
an
address,
size,
and
that
checksum
are
summed.
¢Data
set
1:
DTI
(12H)
This
message
corresponds
to
the
actual
data
transfer
process.
Because
every
byte
in
the
data
is
assigned
a
unique
adress,
a
DT
message
can
convey
the
starting
address
of
one
or
more
bits
of
data
as
well
as
a
series
of
data
formatted
in
an
address-dependent
order.
The
MIDI
standards
inhibit
non
real-time
messages
from
interrupting
an
Exclusive
one.
This
fact
is
inconvenient
for
devices
that
support
a
“soft-thru”
function.
To
maintain
compatibility
with
such
devices,
Roland
has
limited
the
DT1
to
256
bytes
so
that
an
excessively
long
message
is
sent
out
in
separate
‘segments’
Byte
Description
FOR
Exclusive
Status
aH
Manufacturer
1D
(Roland}
DEV
Device
ID
MDL
|
Model
If)
DH
Command
1D
aalt
Address
MSB
}
i}
f
N
|
LSB
ddl
Data
MSB
3
I
i
isB
som
Check
sum
WH
End
of
exclusive
*
A
DTL
message
is
capable
of
providing
only
the
valid
data
among
those
specified
by
an
RQI
message.
*
Some
models
are
subject
to
limitations
in
data
format
used
for
a
single
transaction.
Requested
data,
for
example,
may
have
a
limit
in
length
or
must
be
divided
into
predetermined
address
fields
before
it
is
exchanged
across
the
interface.
*
The
number
of
bytes
comprising
address
data
varies
from
one
Model
ID
to
another
*
The
error-checking
process
uses
a
checksum
that
provides
a
bit
pattern
where
the
last
7
bits
are
zero
when
values
for
an
address,
size,
and
that
checksum
are
summed.
*Example
of
Message
Transactions
*Device
A
sending
data
to
Device
B
Transfer
of
a
DTI
message
is
all
that
takes
place
[Data
set
1]
energie
*
More
than
20m
sec
time
interval.
{Dataset
]]
9
——————»
De
[Dataset]
*
Device
B
requesting
data
from
Device
A
Device
B
sends
an
RQI
message
to
Device
A.
Checking
the
message,
Device
A
sends
a
DT]
message
back
to
Device
B.
[Request
data]
[Data
set]
>
*
More
than
20m
sec
time
interval
Dataset]
————$———»
[Data
set
1)

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