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GENERAL FORMAT
The general format for the System Exclusive information is as follows (note: all SysEx values are displayed in
Hexadecimal format, along with this symbol (h) for clarification):
Hex Value Definition
F0(h) System Exclusive ‘Begin Message’ byte
00(h)
00(h) Manufacturer’s ID Number (DOD/DigiTech)
10(h)
0n(h) n = Unit’s Device or SysEx Channel number (minus one)
e.g. 00(h) is device or SysEx Ch 1
01(h) is device or SysEx Ch 2
etc...
0F(h) is device or SysEx Ch 16
dd dd = device ID number 49(h) identifies the 2112
pp pp = Procedure number. The different procedure’s names and general formats are described in
the Procedures Section.
dd(1)1, dd(1)2......dd(n)1, dd(n)2
dd = Data as needed by procedures. Since the standard MMA MIDI Specification reserves 80(h) through FF(h)
(decimal numbers 128 through 255) for specific commands, a split byte format is adopted for all data com-
munication in this SysEx implementation. dd(n)2 denotes the 1st through 7th bits of the nth byte and
dd(n)1 denotes th 8th bit of the nth byte. Note: All data that is requested or received, is in split byte for-
mat unless noted otherwise.
F7(h) System Exclusive ‘End Message’ byte
PROCEDURES
In the following section, SYS_HEAD refers to a valid System Exclusive header.The System Exclusive header starts with
the System Exclusive status byte, and includes all bytes through the DigiTech device type. F7(h) is the System
Exclusive ‘Message End’ byte.All SysEx numbers in the format definition of each procedure are given as hexadecimal
values, along with this symbol (h) for clarification. Binary numbers are identified with this symbol (b).
REQUEST ONE PROGRAM (01h)
SYS_HEAD, 01(h), yy1, yy2, zz1, zz2 F7(h)
When yy = 00(h) User bank is selected
When yy = 01(h) Factory bank is selected
zz The Program number, 1-100 User (00-63(h)) or 1-124 Factory (00-BE(h))
When a Request One Program procedure is received, the 2112 will respond with a Receive One Program
procedure.
RECEIVE ONE PROGRAM (42h)
SYS_HEAD 42(h), vv(1)1, vv(1)2, vv(2)1, vv(2)2, yy1, yy2, zz1, zz2, dd(1st)1,dd(1st)2, ... dd(nth)1, dd(nth)2, F7(h)
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