Synth-DIY Yahoo! Groups Archives

Angel City Turbo - source available?

2014-12-29 by Nothing Special

I've just bought a DW-8000 with an Angel City Turbo board, and while
I'm looking forward to getting to use it, there seem to be a few
shortcomings (in particular, it doesn't look like Voice A and Voice B
have separate LFOs.) These may simply be due to the limitations of ROM
size and/or a 2MHz CPU, but since I enjoy small-systems hacking
anyway, I figure it couldn't hurt to take a look under the hood and
see if it couldn't be tweaked a little further. I don't suppose the
original source code is available, or at least a commented
disassembly?

Re: [DW8000] Angel City Turbo - source available?

2014-12-31 by Bob Grieb

Hi,
I have a DW8000 and would be interested in that mod. Can you either
Dump the EPROM or maybe send it to me and I will dump it
And sendit back. I can also generate a disassembly for you,
But without any comments of course.

Bob

From: Nothing Special nothingsp@... [DW8000] <DW8000@yahoogroups.com>;
To: <DW8000@yahoogroups.com>;
Subject: [DW8000] Angel City Turbo - source available?
Sent: Mon, Dec 29, 2014 11:21:07 PM

I've just bought a DW-8000 with an Angel City Turbo board, and while
I'm looking forward to getting to use it, there seem to be a few
shortcomings (in particular, it doesn't look like Voice A and Voice B
have separate LFOs.) These may simply be due to the limitations of ROM
size and/or a 2MHz CPU, but since I enjoy small-systems hacking
anyway, I figure it couldn't hurt to take a look under the hood and
see if it couldn't be tweaked a little further. I don't suppose the
original source code is available, or at least a commented
disassembly?

Re: Angel City Turbo - source available?

2015-01-05 by eska@...

If you look in the schematic, you can see, that pitch modulation is monophonic for the whole synth by modulating the clock frequency of the digital waveform generator. Also monophonic is ocillator mix, resonance and noise level.