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I assume no responsibility for any damages arising out of use or inability to use this text. No warranty is provided about correctness of any information in this file. You are on your own.

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The chip I am going to describe is getting more and more common, but programming information is still scarce, so I have decided to fill in this gap. All information contained in this file is a result of my experience in Adlib programming, research read: reverse engineering and finally of my effort to write down everything necessary to understand and use this piece of hardware.

No official sources i. I currently have a Sound Blaster Pro II-compatible card only, so all the programming info I provide will be based on this card. The other cards are quite similar, however. If you are new to this topic I recommend you try Adlib first before going higher. My card's user manual says: "[this card contains] This must be a GOOD sound-card. Just another advertising lie. So let's clear some facts. First, OPL3 has only thirty-six 36 operators which can be combined in several ways:.

From the table above you can see that not all channels can be used in four-operator 4-OP mode -- only a part of the synthesizer is really capable of making 4-OP sounds -- the rest uses traditional two-operator 2-OP mode.

Second, the manual states this card is capable of "stereo" music. Yes, the quotes are necessary, because the stereo capabilities are very limited.

You are given ability to control output going to left or right channel by turning it on and off. That's all.

opl2 datasheet

So the sound can flow from very left side, center and very right side. No sound panning, no special stereo effects.

Output of both operators is simply added. The diagram should make it clear. Output from the first operator Modulator is sent to the input of the second one Carrier and is used to modulate alter frequency of the second operator.Pages: [1]. YM, from Yamaha.

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Found that old opl2 chip, YM, from Yamaha, basically part of an old 8bit sound blaster card. And this bus is also well documented. I found some library for the chip, probably will need to be adjusted for the Arduino world.

But yeap What would you do leave it on board or stick it to a bread board? As we fight our way northward into the great unknown, only that one thing remains certain Re: YM, from Yamaha. So I've decide to hook the thing on the bread board.

There is so much to know about the whole sound card and the MCA standard, that there is a good probability that the required library to make the sound card run will not fit in the k available. So let's get started. Cause of the 4 pictures limitation the last 2 pictures will be send in the next post.

Has promessed. As you can see in picture 5 the project might be possible since the thing is meant to work under 5 volt. Aint life great? Humm what would you do? By the way, I will be using the YB that fortunately was also on socket on the sound card.

I can't find the PDF yet, but i will make some circuit picture up in the worst case scenario that the pdf does not exist.

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It's a 8 pin dip chip so it should not require much work to figure out what is what since it's hooked straight to the YM Ok so that it for me for the rest of the after noon, working at work some more tonight on this. See ya. Hi there, I do not know if you are still working on this project. I am working on a similar project, a Synth using the YM I got the documentation, the first step is to generate the clock signal.

The YM clock being 3. It uses a 3.Not a member? You should Sign Up. Already have an account? Log In. To make the experience fit your profile, pick a username and tell us what interests you. We found and based on your interests. Choose more interests. Hearing the Apogee fanfare tune after typing in the exe always meant I was gonna have a great time and I fondly remember the music from games like Commander Keen, Hocus Pocus, Bio Menace and many more!

After reading through the datasheet of the YM it seemed easy enough to hook it up to an Arduino and play some tunes. I started by adding a to serve as a serial interface to the YM. I send data to it using SPI. I started looking around for schematics that could show me how others did it. I found several. The first one I found linked in a forum post on the EEVblog.

It seems to be from a C64 sound expander. I copied the filtering stage on my breadboard, but all it did was produce terrible hissing and other noises. With a bit more searching I found the reconstructed schematic of the actual Adlib card. The filter used in that one was also quite involved and also didn't work for me.

So I started to poke around with the speaker wire until for the first time I could hear some OPL2 music through the noise that this circuit was producing. From there I started experimenting by adding and removing components until I settled on an LM OPAMP and two 10 uF caps which give me great audio, as you can hear form the demo video.

I turned out really nice.

OPL2 Audio Board: an AdLib sound card for Arduino

Note that the board does need an external amplifier. View all 12 components. The board is available both as a kit and in assembled form. Detailed instructions on how to put the kit together can be found in the Github repository that also contains the library software and examples. The kit is an updated version of my original board including a simple amplifier and a 3.

View project log. Create an account to leave a comment. Can this work with a board that uses 3.

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I have a 3.However, instead of relying on a parallel port, it uses a serial interface, which can be drived from an Arduino board or a Raspberry Pi.

I have paired it with a cheap clone of the Arduino Nano. A library to drive the board is available on GitHubalong with some examples. One of them is DemoTune. It plays a short tune on three channels. It can be compiled and uploaded to the Arduino with PlatformIO —installable with pip install platformio —using the following command: 1.

The next interesting example is SerialIface. It turns the audio board into a sound card over serial port. Once the code has been pushed to the Arduino, you can use the play. They are a sample-accurate sound format for many sound chips.

They log the exact commands sent. There are many of them on VGMRips. Here is a small selection:.

opl2 datasheet

The support for the serial protocol used in this section has not been merged : instead, a simpler protocol was designed. You need to grab SerialIface. When the Arduino is flashed with SerialIface. Here are some examples of games:. However, I have no idea if the rendering is faithful. Adding support for this protocol in DOSBox is relatively simple patch. The binary commands are pipelined and a dedicated thread collects the acknowledgments. A semaphore captures the number of free slots in the receive buffer.

As it is not possible to read registers, we rely on DOSBox to emulate the timers, which are mostly used to let the various games detect the OPL2. To test it, you need to build DOSBox from source:. To fix this, you need to recompile SerialIface. The same code can be adapted for ScummVM patch. To test, build it from source:.

opl2 datasheet

Then, you can start ScummVM with. This command is valid for an Arduino Nano. For another board, take a look at the output of platformio boards arduino.

Notice The support for the serial protocol used in this section has not been merged : instead, a simpler protocol was designed. About Blog Projects.There are no required accessories for this product. There are no recommended accessories for this product. Use the filters below to get started, then click on documents to add them to your basket. Enter a zip code, select a range, and choose a Distributor type to locate the nearest Distributor.

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Yamaha YM 3812 Application Manual

All rights reserved. We noticed that you're using an older version of the browser. By using an older version, some of our website's functionality could be lost or things may not display correctly.FM Synthesis 2.

FM Synthesis 3. FM Synthesis 4. FM Synthesis 5. FM Synthesis 6. FM Synthesis 7. FM Synthesis 8. FM Synthesis 9. FM Synthesis FM Synthesis. The chip came onto the market sometime around Although the YM saw its share of success in arcade games fromit was only a stepping stone to the ubiquitous OPL2 and OPL3 chips which dominated the PC and arcade audio scene from the late s to the s.

The YM outputs mono audio and can operate in rhythm or percussion mode. In rhythm mode, you have access to 9 voices, in percussion mode you have 6 melody voices and 5 percussion voices. A couple arcade games used two chip in tandem to get stereo output. This chip's successor, the OPL2is fully backward compatible with this chip.

The only device known to use the YM is the Sound Expander. A YM mounted on a Sound Expander. Jump to: navigationsearch. YM Developer: Yamaha Released: ? Type: Chip Channels: 1.

Categories : Hardware Chip. Navigation menu Personal tools Create account Log in.Maybe you have an Alesis MidiFex rom dump - I'm still missing it.

Here's a MidiVerb dump for you in exchange. In fact, you can find tons of my dumped roms on this great webpage. If you have the card but don't know how to create an exact backup of it, I'll help you with it - it's easy. Or maybe you have managed to download the oldschool Yamaha Playcard library magnetic strip music data captures in wav files that were once hereand also are not preserved by archive-org.

If you do, please email me! This is an attempt to create the most extensive Yamaha synth chip list ever. Before we get to the chips, here are a few things I'd be happy if you could help me with: Maybe you have an Alesis MidiFex rom dump - I'm still missing it. Yamaha Chips This is an attempt to create the most extensive Yamaha synth chip list ever.

Edward D-tech www. YM pinout. Reference frequency divider, typical thing in electronic organs. Generates reference high frequencies for every semitone from one high frequency oscillator. DIP16 weird thing with negative logic and 1-bit serial streams. Keyboard control processor, on these eary models called "Key Assigner".

Wavetable PCM tone generator. Uses external up to 4kbyte ROM with sample loops. Requires external DAC. Interesting chip, that can be loaded with arbitrary IIR coefficients. YM datasheet. Very interesting rompler chip, that uses oddball custom serial roms YM2x 6voices. Each half can use only it's own dedicated ROMs, so the polyphony usualy is 6voices for percussion and 6voices for base. DSR, HS-8,? Info only from Cyberyogihave not seen it myself. Info only from Tim Milkfloats.

I haven't seen it myself. Interface may be similar to the YM bitclock, sync, addr to rom a If I will someday get my hands on a TYU with cartridge sI will read them out and post data and format there. This might allow to make an improvised MIDI interface cartridge, with access to all song multitimbrality features. Serial drum roms most likely, but haven't yet checked those in life.

Programmer's Guide to Yamaha YMF 262/OPL3 FM Music Synthesizer

Contains only ride cymbal. Contains only crash cymbal.

Adlib on a Breadboard (YM3812 OPL2 VGM Player)

Contains hihat, cowbell and claps. Contains a variety of bass and snare drums, rimshot and tom. Contains alternative hihat, cowbell and claps. Contains one bass, two snares, rimshot, shaker and three toms. Minimalistic single chip toy synth.

Surprisingly compact with respect to it's functions DIP24 package. Excellent Sega Megadrive-ish tone generator. YM B pinout.


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