Casio MZ-2000 - Manual (Page 17)

16
MZ-2000 MIDI Implementation
✩ Data offset (16-bit Address Offset)
d0[9] 0jjjjjjj 000jjjjjjjkkkkkkklllllll
d0[10] 0kkkkkkk = Data address offset (16 bits x data)
d0[11] 0lllllll
Offset from PS header address specified by the PS number in the packet data
Note that this is a 16-bit address, and not a byte address.
A session that is divided among multiple packets starts from 0 and this value is incremented by
the length of each packet.
✩ Number of data items inside a packet (16-bit data is counted as 1.)
d0[12] 0mmmmmmm 0mmmmmmm = Data number of this packet (16bit x data)
✩ Data
d1[0][0] 0nnnnnnn ppooooooonnnnnnn = Data (16 bits)
d1[0][1] 0ooooooo
d1[0][2] 000000pp
:
d1[N][0] 0nnnnnnn ppooooooonnnnnnn = Data (16 bits)
d1[N][1] 0ooooooo
d1[N][2] 000000pp
N = mmmmmm-1
Three bytes are expressed by 16 bits, and packets can be transferred with up to 64 x 16 bits per
packet.
The basic bulk dump of the MZ-2000 sound source is in 64 x 16 bit units.
ss 0sssssss checksum (value that produces 0 when added to d0[0] to ss)
Parameter Set BDR/HDR
tt 0100aaaa aaaa = BDR/HDR
d0[0] 0ooocccc cccc = Parameter Set Category (same as BDS/HDS)
ooo = option (same as BDS/HDS)
d0[1] 0ttttttt 0TTTTTTT0ttttttt = Type ID
d0[2] 0TTTTTTT
d0[3] 0mmmmmmm 0MMMMMMM0mmmmmmm = Mdev ID
d0[4] 0MMMMMMM
d0[5] 0sssssss 00SSSSSSSsssssss = Section Number
d0[6] 0SSSSSSS
d0[7] 0nnnnnnn 00NNNNNNNnnnnnnn = PS Number (header PS number)
d0[8] 0fffffff
✩ Number of requested parameter sets
d0[9] 0nnnnnnn 00mmmmmmmnnnnnnn
d0[10] 0mmmmmmm
Number of parameter sets requested by entire session.
4.2 MZ-2000 System Control
4.2.1 General
MZ-2000 system control messages enable system common functions by changing system param-
eters.
4.2.2 MZ-2000 System Control Message Format
The MZ-2000 System Control block is a system exclusive implementation. Only IPR and IPC are
recognized, and messages are provided to send system data, for initialization, etc.
System Information Request (except avail type) IPR/IPC
tt 0000aaaa aaaa = IPC..."SYSEX_ACT_IPC" = 00H
IPR..."SYSEX_ACT_IPR" = 01H
d0[0] 00000000 System Parameter Access Message ID = 00H
d1[0] 0ppppppp ppppppp = System Parameter ID
= Parmeter ID of operation
d2[0] 0xxxxxxx Data block
(Depends on the parameter. See the following section for details.)
:
4.2.3 IDs and Operations of Each Control Parameter
A list of the control parameters is shown below. A parameter recognizes an IPR or IPC, depending
on the parameter.
Param ID / IPR/ IPC/ Function
20H - * Save/Resume MidiSetup (DevID, Global Channel)
21H - * Tone Gen / Mixer / EffectAll Initialize
22H - * DSP Effect Initialize
(*...Recognizes, -...Ignores)
MIDI Setup Save/Resume
This message saves or restores the DevID and the Global Channel.
d2[0] 0aaaaaaa aaaaaaa = 0...Save MIDI Setup
1...Resume MIDI Setup
The expected operation may not be performed during MIDI playback of song data or other data
when the Global Channel used for the Device ID and effector control is not fixed. The Resume
MIDI Setup message can be used as described below to avoid this problem.
* When the song data starts, the Save MIDI Setup message can be sent to the MZ-2000 to save
the Device ID and Global Channel and initialize these parameters to the default values shown
below.
o Device ID.........16 (10H)
o Global Channel....Channel 1
* Receipt of the Resume MIDI Setup message after the song data is finished restores the saved
Device ID and Global Channel data.
Tone Generator/Effect/Mixer Initialize
Receipt of this message initializes the sound source of the parts that can be played by MIDI, the
mixer, all effector settings, and all effector insertion settings.
This function is executed when:
d2[0] 0aaaaaaa aaaaaaa = 1111111 = 127
DSP Initialize
Receipt of this message initializes the mixer insertion setting and effector insertion setting.
This function is executed when:
d2[0] 0aaaaaaa aaaaaaa = 1111111 = 127