This card uses the famous Yamaha OPL3 chipset, used by many popular sound cards in the late 1980’s and early 1990’s. No emulation!Designed by TexElec, Ships from United States of America
We offer modern solutions for vintage computer systems and retro gaming. Our products are great for collectors, hobbyists and do-it-yourself’ers.
We’re proud to introduce our latest product, the Resound OPL3 Sound card! This card is an 8-bit ISA card, and will work in any PC with an 8 or 16 bit ISA slot. We even tested it in our Packard Be...Read More…
This card is an 8-bit ISA card, and will work in any PC with an 8 or 16 bit ISA slot. We even tested it in our Packard Bell PB500 in non-turbo mode. Our machine has an NEC V20 CPU, in non-turbo mode, it will be running at roughly 6 Mhz. We were able to play Space Quest III with this configuration. In turbo, it’s more playable, but the sound plays back just as it should at either speed. The card has its own 14.31818 Mhz oscillator to ensure that no matter your machine’s bus speed, you will never have any fear of the pitch changing. Most sound cards use an oscillator supplied by the ISA bus. In 95% of machines out there, this will work fine. However, there are some machines which send a slower speed to the oscillator on the bus which will cause a lower pitch than expected to play.
This card uses the famous Yamaha OPL3 chipset, used by many popular sound cards in the late 1980’s and early 1990’s. No emulation, it uses a real Yamaha YMF262 IC to do the work. The OPL3 is backwards compatible with the OPL2, so any game or application written to use an Adlib sound card will also work. We tested this card on Windows 95 OSR2 and Windows 98 Second Edition and found that it works great with the Adlib Gold driver. This driver loads the OPL3 driver for windows and supports all of the features of the OPL3 chipset. See the last pic above. (Win98 auto detects the card at install, but we had to add it manually on Win95.) Please note, this card will not playback wav/digital files, it is an FM synthesis card only. The OPL3 is the sole provider of sound.
Our card is a little different than the older ones, because it can do more! While designing the card and researching the OPL3 datasheet, we noticed a feature which never seems to have been implemented. While the OPL2 was single channel (mono), most of the OPL3 cards released supported stereo. It turns out, that the OPL3 will actually support 4 channel sound. We decided that we had to implement this, even though there are no games or apps at this time which support this mode. It is our hope that down the road, developers may decide to support this feature to offer surround! The card will still work in two channel mode just fine, as any older card would.
In addition, we added a dip switch bank on the card which will allow you to set this card to any base IO address. The original Adlib card was hard-coded to use port 0x388, but our card can use any port you like. It will ship set to 0x388, so you can just plug it in and go! It is possible you may be able to trick some apps into supporting port 0x220 like the original sound blaster, or you can just use any port you like for your own purposes or testing. It’s really just there to make the card as flexible as possible, or you can leave it where it is forever. It’s a true DIY card!
The card also has a line-level input pinned the same as any sound card input. We installed this so you can chain your other sound cards into this one if you like. This input mixes with the front channels on the card, not the rear.
Since there are no applications which support 4-Channel sound, we wrote a test application to activate all 4 Channels. We are making this program, the source-code for it, as well as the schematic available. You may download these files here: Resound-OPL3-Files.zip
A few other nerdy notes about its design for those who may be interested: The card uses high quality WIMA Film capacitors for bypassing DC in the audio path. We made a few prototypes, and wound up using bypass caps before, and after the final opamp stage to keep the card as clean sounding as possible. This will help block DC noise coming from the digital section of the card, and allow the AC audio signal to pass. We also used a 10uf & 0.1uf decoupling cap on both power rails of the TL074’s & TL072’s on the card. The TL074 are used by the Yamaha DAC, and the TL072 are the final gain-stage for output. We wound up deciding on a relatively low-gain on the output stage as the output from the DACs are fairly hot to begin with. It does a 2:1 gain, and the RMS voltage is a little lower than a line-level, but is loud enough from our testing. Setting it to 3:1 seemed to overdrive the signal slightly. This gain will also effect the input port, so please be aware that you do not want your input to be too hot.
Please watch our video below which shows the card in action! It also explains some of the technical details of the card in more detail. You can also see a review of this card by Lazy Game Reviews aka LGR from YouTube.
Feel free to ask any questions you may have before ordering. We want to make sure the card is what you are looking for! We love the DIY PC / DOS Gaming market, and hope to keep making more cards that the community can use. Thanks so much to our customers for their support, and thanks for looking!
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United States Postal Service: First Class Package
First Class Package will arrive in approximately 2-5 business days. We package and ship every business day. All packages will be dropped off with the carrier by 12:00pm CST each business day. Any orders after that time will be dropped the following business day.
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We are Kevin & Sara a husband and wife team building and offering items for vintage computers and retro consoles. Here is a little about us...
My name is Kevin, and my first exposure to electronics was through my father back around 1980 when he was taking electronics classes in college. His 8085 breadboard computer was mesmerizing. After that, no electronic component in the house was safe from disassembly! We moved through a Vic-20 and then a Commodore 64 where I began to write code for the first time. When I was 15 I got my first XT clone. I began working for one of my cousins who wrote dBXL & Clipper applications for small businesses. My job was building XT & 286 clones, and setting up Novell 1.x / ArcNet networks. Off and on, I built clone PCs and sold them in the newspaper. By 17, the guy I was buying parts from offered me a job. We built 100s of PCs a week sometimes! I started a programming degree (but never completed) when I was 18, but by 19, I was working the helpdesk for Johnson & Johnson Medical. I later moved to the Server Ops team and started working on LanManager and the then new Windows NT 3.1. After a few more years, I moved to Microsoft and stayed there until 2013, when we decided to work for ourselves. I held several roles within Microsoft, but my primary specialty was networking and TCP/IP services. Throughout my life, my first love of electronics never lost hold and I started working with Atmel microcontrollers around 2000. I started writing code in assembly, and later moved to Arduino when it started blossoming. I’ve built various electronic boards starting when I was 12 for the Commodore up to much more complex boards today. I still have a lot to learn, and I hope this store will push me to come up with even better products to help others with our same passion.
My name is Sara and I am co-owner, wife and mother around these parts. My first encounter with computers was way back in my high school computer class. It was an Apple and I mostly remember the drawing program we used and how it was much different than using an actual paint brush. My first PC exposure was also back in high school and it was a Packard Bell which I mostly used to create spreadsheets so I could make schedules for work. Since then I have used many different programs that range from database development for office processes to graphics programs to assist me in web development. I would consider myself a power user more than a full on “computer nerd”, although it is nice when people mistaken me for one. Since we started selling assembled boards on eBay, my help has been needed in order to get products ready and listed for sale. This has given me the chance to do a little surface mounting myself and I have to admit, I really enjoy the detail it takes to complete them successfully. That along with packaging and helping our customers is probably my favorite part of our business. If you purchase from our site or even from our eBay store it is more than likely that I will be the one preparing your item for shipment. I take customer service very seriously, I may be a bit old school that way.