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Miscellaneous
62
Rodgers 538/i548
1. Stop change
This message is transmitted each time one or more
stops, couplers, or auxiliary controls changes state.
The state of each control is represented as a bit in one
of the message data bytes.
The assignment of controls to specific bits is standard-
ized for all Rodgers organs by use of the master code
assignment list included herein.
Activated controls (“on”) are represented by ones in the
bit map.
This message is transmitted on the Sequencer and Pipe
ports only on organs which have a separate MIDI
Instrument port.
It can, however, be received on the Instrument port as
well.
2. Memory dump
This message is transmitted when you transmit
(“dump”) a Combination memory to a sequencer. The
body of the message contains the data of all Combina-
tion memories; several such messages are usually nec-
essary to transmit the complete contents of all the
memories.
NRPN (CC99 & CC98) addresses to use for selecting Orchestral Voices via MIDI:
Example:
Subcommand byte: 01H
Offset byte: 00H~22H This byte indicates the offset
of the first data byte from the
beginning of the bitmap. Nor-
mally, this will be zero, and the
entire map (35 bytes) will be
transmitted. It is possible,
though, to send only part of
the map beginning with the
byte indicated by this value.
Data bytes: dd, dd,... The data bytes represent the
new state of the bit map
beginning at the offset speci-
fied above. Any number of
data bytes up to the full length
of the bit map may be sent,
although the entire map is
usually transmitted. Refer to
the included chart for stop
map assignments.
Subcommand byte: 03H
Offset byte:
mm This byte contains the zero-
indexed number of the combi-
nation memory being dumped.
Data Bytes: dd, dd, … The data for the memory is
converted from one byte with
8 significant bits to two bytes
with 4 significant bits each.
The high order bits are con-
tained in the low order nibble
of the first byte. The low order
bits are contained in the low
order nibble of the second
byte. The contents of the pis-
ton data structure is propri-
etary and not disclosed.
Status 2nd byte 3rd byte
BnH 63H mmH
BnH 62H IIH
n= MIDI channel number: 0H~FH (Ch. 1~16)
mm= upper byte (MSB) of the parameter number specified by NRPN
50H (80 d) Program Change
51H (81d) Variation
II= lower byte (LSB) of the parameter number specified by NRPN
BB 99 80
BB 98 00
BB 06 xx = (Program Change) PC
BB100 127
BB101 127
BB 99 81
BB 98 00
BB 06 xx = (Variations) VC
BB100 127
BB101 127
Rodgers 538_i548.book Page 62 Monday, February 4, 2008 9:02 AM