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Re: Covox Sound Master Reverse Engineering / Replica

Posted on 2021-07-05, 02:19

Sorry for a long delay from the last update. https://youtu.be/ix2NEqVtKmk I've worked a bit with that "first version" replica and moved forward a bit. First iteration had very noisy and quiet output. That's logical, because all analog parts (opamps, AY, switch) were getting power directly from noisy …

Re: FMonster, the monster of sound synth

Posted on 2021-04-03, 21:09

I've also had checked OPL2 debug block ( AdLib -compatible). I was very slow to begin testing this block, so PCB design changed several times before I've got to assemble one. So I've tested version 02. https://youtu.be/A7bA6h1Hsso YM3812 is purely digital IC, it does not output analog audio, it …

Re: FMonster, the monster of sound synth

Posted on 2021-03-31, 00:46

Any progress on the FMonster? I also would like to know the latest news on this project Sorry for a long delay from the last update. Yes, there are some updates. I've tested 2xSAA1099 debug block (Creative Music System compatible). It is based on Tronix 's schematics with some changes. https:// …

Re: FMonster, the monster of sound synth

Posted on 2020-07-12, 20:15

So in DuoSID both SID chips listen on the same base port? From what i can see there's only 1 base port selection which means both SID chips Will play the same thing. Wouldn't it be better to have a different base port for SID 1 and SID 2? Earlier DuoSID and FMonster had user-selectable port for …

Re: FMonster, the monster of sound synth

Posted on 2020-05-10, 11:06

An update on debug block verification . I've tested SID-containing one. Basically, it works as intended: https://www.youtube.com/watch?v=uJK9DpSWL8Y It works with "SSI-2001 compatible" games. And it works with "*.SID" file players. But it has heat problems when using with 8580 SID. I have to look …

Re: FMonster, the monster of sound synth

Posted on 2020-01-23, 22:13

matze79 wrote on 2020-01-23, 21:47: Hey the russian guy just took the public schematics 😉 And I do not do any schematics for my project. Except of small snippets on paper. But nevermind, there was copycat version of SSI-2001 replica created on those forums too. Oh, well.

Re: FMonster, the monster of sound synth

Posted on 2020-01-19, 16:27

MrSmiley381 wrote on 2020-01-19, 16:02: Dude, that's some cool stuff. Thanks! MrSmiley381 wrote on 2020-01-19, 16:02: So what's the next board that's receiving the debug treatment? Probably SID (SSI-2001/DuoSID), but that should be easy. Next... 2xSAA1099 (CMS) I guess.

Re: FMonster, the monster of sound synth

Posted on 2020-01-19, 15:12

Finally... The video about first fully tested debug module - SN76489A / SN PSG / 3-voice PSG / Tandy sound . Video is in Russian, as usual. But automatically translated subtitles can help with that. https://youtu.be/-4YIZy-07sI And additional video, test of this module in 8 DOS games: https://youtu. …

Re: FMonster, the monster of sound synth

Posted on 2020-01-12, 14:04

One of those cheap heat map guns on ebay? Exact opposite. Flir E4. Bought it recently. I don't understand why you use a Buffer and @decoding for each chip. Only some buffers and a CPLD for @decoding cad do everything and it will save so many space. I do not want any programmable device on the …

Re: FMonster, the monster of sound synth

Posted on 2020-01-12, 02:21

I've finally got to test the "3-voice PSG" board (SN76489)! And it works just fine. Of course there were some minor bugs as: - I've forgot to connect power to one logic IC that provided clock for SN76489 - Some capacitors and resistors needed to be added to reduce noise level - I've connected LED to …

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