lawitzke@msudoc.UUCP (06/09/86)
I am experimenting on the side with sound generation on my CocoII. I
have the Orchestra-90 pack for it. From the schematics for Orch90 it is
obvious that it consists of software and two D/A converters. I'd like to
hear from anyone who has figured out the addresses of these two A/D
converters. Then, I should be able to experiment with custom waveforms,
etc. Thanx
--
********* John H. Lawitzke
* * 260 Engineering Bd.
* ** ** * Michigan State University
* ** ** * E. Lansing, MI, 48823
* * *
* * * office: (517) 353-5984
* * home: (517) 332-3610
* ***** *
* * ...!ihnp4!msudoc!lawitzke
*******knudsen@ihwpt.UUCP (mike knudsen) (06/13/86)
> I am experimenting on the side with sound generation on my CocoII. I > have the Orchestra-90 pack for it. From the schematics for Orch90 it is > obvious that it consists of software and two D/A converters. I'd like to > hear from anyone who has figured out the addresses of these two A/D > converters. Then, I should be able to experiment with custom waveforms, > etc. Thanx > ********* John H. Lawitzke Well, I don't know the addresses, since I use an otherwise identical "Stereo Pak" made by Speech Systems, Batavia, Ill. I'd suggest PEEKing at addresses starting at FF50 and going by multiples of 4 till you read what looks like an ACIA (6820), assuming that's what Orch-90 uses. Or try POKEing away, alternating 255 and 0, till you hear a click in your speaker. If you want some of my software music stuff, written over the last three years (including a score compiler with DECENT notation and a real-time wah-wah organ program using FM sysnthesis), email me for where to send a blank diskette. (Say -- Steve Swope, are you still alive?) mike k