lemonhorse

chip testing: my first functional chip test was successful! (as I expected :) )

got a mail from mike today - he told me that the two AY 3 8912 test boards are almost on the way.

@nILS "Sie haben Post" ;)

same here! :)

Just to inform you: Mike is on vacation till the end of this week. So there is a little delay of the AY 3 8912 board. Hardware Update: MIDIBox AY 3 8912 Mixer > Added a MASTER VOLUME POT: ==> http://www.midibox.org/dokuwiki/midibox_ay_3_8912_mixer

:D

Hi Andrew, for practical reasons i would prefer a discrete adapter board solution for the YM2149 / AY-3-8910 chip (for a jumperless ready to use and small AY 3 8912 board). But it would be great if someone would design, test and release a YM2149 or a AY-3-8910 adapter solution :) For now I'm waiting for the AY 3 8912 board from Mike. After a successful testing I will release all the relevant details.

good to know!

thanks to the co-operation of nILS the MIDIBox AY 3 8912 BOARD is getting more and more real. I sent the Eagle files to mike and now I'm looking forward to receive two testboards for nILS and me. :) the MIDIBox AY 3 8912 USER DETUNE MENU is working now => http://www.midibox.org/dokuwiki/midibox_ay_3_8912_tune . In addition there is a new USER ENVELOPE MENU info page => http://www.midibox.org/dokuwiki/midibox_ay_3_8912_envelope best regards, - lemonhorse

Yes - I'm in. I can do the chip forwarding in germany (+ chip testing!) ;)

Thanks, another item in my MIDIBOX AY 3 8912 todo-list. In my view 2 chips make sense (for a better niose/tone volume control handling) but I'll have to work off many other issues first. At the moment I'm struggling with eagle for the MBHP AY 3 8912 board ;)

Danke für all den Spaß am MIDI-Gerät! ;) Thank You TK!!! Yours respectfully, - Lemonhorse

4! :D ;) => Kiel, Germany

hey hey!!! :o :)

deleted that one.

I took my AY 3 8912 chip from an old and broken arcade board - but such boards are hard to find. AY-3-8912 / ay38912 ($6.50) http://www.arcadechips.com/product_info.php?cPath=27_22&products_id=111 AY-3-8912 - IC AY-3-8912 Sound Generator (€9.00 (Excl. VAT)) http://www.parts4pinballs.com/index.php?currency=EUR&manufacturers_id=9&sort=3a&filter_id=14 [deleted] Hard-to-find Integrated Circuits (USA) http://mysite.verizon.net/res8aiig/ICparts/ICparts.htm#AY38912 Bassenberg (Kiel, Germany) http://www.bassenberg.de/request.php/products_id/2666/AY-3-8912.html Elektronische Bauteile (german) http://www.flipperwerk.de/Elektronik The only shop I personally know is Bassenberg. If You wand me to ask Jörg Bassenberg for a AY 3 8912 I will do :)

Mea culpa! :-\ I thought it was the SM driver but there was a loose connection (sometimes working sometimes not) in the MIDIBoxKB interface @74HC165 Thank You for pointing me in the right direction stryd! :)

Yes - perhaps it's the hardware. I'll check the MIDIBoxKB interface.

I just got an issue with the sm 8x8 keyboard driver - some keys working fine - but there are some other keys with strange behavior (as F1, F3, F5, arrow up, Q, E, T, U, CTRL... ). They do not only toggle once (on/off) - those keys toggle several times (never-ending - actually with diffident values like key F3). I took another keyboard - same results. I furthermore made a cross check with http://www.ucapps.de/mios/sm_example2_v1b.zip

The Menu/Parameter handling is unfinished at the current stage of the Project - but I would like to leave all interaction to the C64 keyboard. Nevertheless I hope the user work flow will be some kind of handy in the end (...it's because - my first Computer was a Commodore64 - and first love never dies ;) )

Thank you all for the feedback! :) @Sirkit: In my view I'm a raw beginner (my method is trial and error) ;D

yes. the ay 3 8912 chip provide three amplitude regs (R10,11,12 - volume/amplitude register a b c: 0-15 dec. [=>4bits: L0 L1 L2 L3]) for the channel a/b/c. this is the internal volume handling of the AY 3 8912 chip. the MIDIBox AY 3 8912 will be equipped with a (user)menu for volume (tone a b c) [volume pre-adjustment 0-15 dec.]. furthermore it's planned that the volume of tone a/b/c will be controllable via control change and velocity (switchable). the mixer module was just designed for mixing the tone a/b/c and for fine justification of the volume level.

tx :)

The new OP MIXER ABC Module is up an running :) @stryd_one: did you received the mail with the OP MIXER stuff for the midibox wiki?

Software: Made some improvements @ TONE-A/B/C Note On/Off: enabled the "ENVELOPE MODE" (THE INTERNAL AY CHIP AMP CONTROL) Now I'm playing around with the TUNE MENU. Sometimes I have to rewrite my own "newbie code" - it's my first asm coding project - I have a lot of fun, but I got to learn a lot as well... ;) Hardware: The AY 3 8912 features Tone A B C out, so I created a small OP AMP MIXER BOARD with Eagle. Mike (PCB-Mike) will etch the board next time (AUDIO MIXER: 3 TONE CHANNELS [A/B/C] TO ONE AUDIO OUT) - then the next step is on my side: checking. After a successful checkup Mike will provide the board and I will upload the Eagle Data (board and circuit diagram) for everyone. The AY 3 8912 module will be the next board to come.