[Coco] Orchestra 90 disassembly

[Bill Pierce]

If you're just looking to use the stereo 8 bit DACs... that's no big deal. If you have a multipack and it's plugged in, the DACs are always online. You just send your data to the 8 bit DAC addresses. Example:
   
   LDA    <Data>  channel 1
   LDB    <Data>  channel 2
          or
   LDD   <Data>  both channels
          then
   STD    $FF7A   (orch90 dacs are at $FF7A & $FF7B)

If you're looking for the 5 voice, waveform mixing routines, then that's another matter. There's several programs out there that do similar and even more complex routines. "Bells & Whistles II" in the 06/87 Rainbow comes to mind as it has 4 voices, 8 definable waveforms, 8 definable volume envelopes and a 128 band EQ. I have already started a disassembly of this M/L routine that is well on it's way to being finished to be included in my player. I hope to do this under OS9 level II and include modules to play Orch90, BW2, Musica, Lyra, Umuse3, and standard MIDI as well as standard sound files (.wav ect.).  ANY help in dissecting any of these players would be a great help. The OS9 players that are out there (that I know of) are PlayMuse (musica), UBox3 (Umuse3), LyraPlay (Lyra), MFFplay (std midi) and it seems like I've seen a PD OS9 version of the Orch90 player but it only had 4 voices (I think). I know there's a DECB version but as stated, it's only 4 voices. I would really like to use the original 5 voices. So... any help with any of these players would be greatly appreciated.

On that note... Aaron... is there any way you could compile a version of Mess for Drivewire4 and make it a package? I really need the MIDI capabilities and the author of VCC seems to have disappeared, so I guess MESS is the only answer (would rather have VCC). This would really benifit the Coco community on so many levels.... ;-)

Bill Pierce
ooogalapasooo at aol.com




-----Original Message-----
From: Aaron Wolfe <aawolfe at gmail.com>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Tue, Nov 29, 2011 3:05 am
Subject: Re: [Coco] Orchestra 90 disassembly


I'm also interested in this, or any information/ideas on how to use
he orchestra 90 to play song files from my own asm code (possibly by
sing routines in the rom?)

n Mon, Nov 28, 2011 at 9:33 PM, Bill Pierce <ooogalapasooo at aol.com> wrote:

 Hi guys,
  Anyone know of a disassembly of the Orchestra 90 software from the rompak? I 
orking on a player for multiple music formats and need this code to play the 
rch90 files.

 Thanks
 Bill Pierce
 ooogalapasooo at aol.com


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