SCI patch.001 Resource Format Revision 0.1 Rickard Lind 1999-12-16 The patch.001 file for Roland MT-32, MT-100, LAPC-1, CM-32L and CM-64. This specification will sometimes look very incomprehensible without some knowledge concerning the MT-32 MIDI implementation. Have a look at http://members.xoom.com/_XMCM/TomLewandowski/docs.html 1. The header (494 bytes) which is always present. Offset Size Type Description ---------------------------------------------------------------------------- 0x000 2 89 00 First Two Bytes 0x002 20 ASCII String for MT-32 Display ("*It's Only A Model* ") 0x016 20 ASCII String for MT-32 Display (" CAMELOT, CAMELOT! ") 0x02a 20 ASCII String for MT-32 Display ("Ham & Jam & SpamAlot") 0x03e 2 word MT-32 Master Volume 0x040 1 Index in Predefined reverb settings at 0x04c (0-10) 0x041 11 MT-32 SysEx block setting reverb (last 3 bytes are dummies) 0x04c 3 Predefined reverb setting #1 (Mode, Time, Level) : : : 0x06a 3 Predefined reverb setting #11 0x06d 8 MT-32 Patch Memory #1 (see Patch Memory description below) : : : 0x1e5 8 MT-32 Patch Memory #48 0x1ed 1 n = Number of Timbre Memory (0-64 userdefined instruments) ---------------------------------------------------------------------------- Patch Memory description Offset Description -------------------------------------------------------------------- 0x00 Timbre Group (0 = Bank A, 1 = Bank B, 2 = Memory, 3 = Rythm) 0x01 Timbre Number (0 - 63) 0x02 Key Shift (0-48) [-24 - +24] 0x03 Fine Tune (0-100) [-50 - +50] 0x04 Bender Range (0-24) 0x05 Assign Mode (0 = Poly 1, 1 = Poly 2, 2 = Poly 3, 3 = Poly 4) 0x06 Reverb Switch (0 = OFF, 1 = ON) 0x07 Dummy -------------------------------------------------------------------- Mapping MT-32 to GM instruments is done with Timbre Group and Timbre Number. Instrument 0-63: Bank A, 0-63 Instrument 64-127: Bank B, 0-63 2. The Timbre Memory block (if n > 0), offset relative to 0x1ee Offset Size Type Description ------------------------------------------------------------------------------ 0x000 246 MT-32 Timbre Memory #1 (see Timbre Memory description below) : : : 0x??? 246 MT-32 Timbre Memory #n ------------------------------------------------------------------------------ Timbre Memory description Offset Size Description ----------------------------------------------------------------------- 0x00 10 Timbre Name (ASCII String) 0x0a See http://members.xoom.com/_XMCM/TomLewandowski/lapc1.txt ----------------------------------------------------------------------- 3. Second MT-32 Patch Memory Block, offset realtive to 0x1ee + n * 246 Offset Size Description --------------------------------------------------- 0x000 2 0xab 0xcd (if this this is not present there is no second block) 0x002 8 MT-32 Patch Memory #49 : : : 0x17a 8 MT-32 Patch Memory #96 --------------------------------------------------- 4. Block for setting up Patch Temporary Area (rythm part) and System Area - Partial Reserve, offset relative to 0x370 + n * 246 Offset Size Description --------------------------------------------------- 0x000 2 0xdc 0xba (if this this is not present this block is non existent) 0x002 4 Rythm Setup for Key #24 (see below) : : : 0x0fe 4 Rythm Setup for Key #87 0x102 9 System Area - Partial Reserve --------------------------------------------------- Rythm Setup description See http://members.xoom.com/_XMCM/TomLewandowski/lapc1.txt TODO: * Clearly describe which parts are interesting for a quick and dirty GeneralMidi/patch.001/FreeSCI implementation * Describe how the Sierra MT-32 driver uses patch.001 * Make this readable to someone who has not been reading reference manuals since early childhood * SGML Revision history Revision 0.1 - 1999-12-16 - First pre-release of the specification