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mytek

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mytek last won the day on October 14 2021

mytek had the most liked content!

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About mytek

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  • Custom Status
    Releasing Magic Smoke
  • Gender
    Male
  • Location
    Santa Rosa, CA
  • Interests
    Electronics, Computers, Cryogenics, Embedded System Design

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  1. mytek
    That is good price. Where did you get it? Have a link? Not that I intend to buy one myself, since I'm always ordering boards for my projects and can just add it to my order. I also have 10 Pico Boards in stock. Its not that I really needed that many, but ordering 10 from AliExpress was super cheap, and essentially gives me a lifetime supply..
  2. mytek
    It wasn't my intention to dissuade you from selling Pico Carts when I mentioned gold fingers. It's just my preference, but not absolutely necessary, with many a 3rd party product not implementing it and seemingly doing well. But I for one would have no issues paying the difference to have it if buying a cart of any kind. Truth be told I would build my own A8 Pico Cart anyway, since it's extremely easy and inexpensive to do. And I think this might be true for many reading this topic, so a manufacturer would have to go for volume to compete.
  3. mytek
    Just something to keep in mind... gold fingers should be used on carts. I know that adds a bit more to the cost, but it insures good conductivity for years. I have a Kung Fu Flash cart I purchased for cheap off of eBay, but unfortunately didn't notice that it didn't have gold fingers. I would have gladly paid the extra to get this feature.
  4. mytek
    I just finished up testing an RF Modulator Replacement Interface Board for the C64C (similar to SAVO) which uses a Mini-DIN for S-Video and a 3.5 mm stereo jack in a multiple purpose role, selectable by a jumper. It always routes stock audio through the left channel, but gives you three options for the right channel output - Composite Video, Right Channel Audio, or Lumacode output. The last two options require specific hardware to support it. I just thought I'd throw this idea out there as a possibility to add to an Atari specific interface. Uses one of these to break-out the Left and Right channel of the 3.5 mm jack. White = stock (left) audio output Red = Composite Video -or- Right Audio -or- LumaCode BTW, I can't take credit for the multi-purpose 3.5 mm jack idea. That came from someone else's design that I spotted a while back on YouTube.
  5. mytek
    Short Board support has been tested and works, including PAL. More Info: https://ataribits.weebly.com/blog/c64-goodies-continued-part-7
  6. mytek
    I usually like to buy 10 of something, especially when it's as small as a cart. The extra 5 boards hardly makes a difference to the cost, and I like to give away some of the extras, as well as have ample stock on hand if I need one or two in the future. At least for my projects, I find the component costs to be more of an issue.
  7. mytek
    If you're not in a rush, JLCPCB used to offer a very cheap shipping option, with the only caveat being it would take 3-4 weeks. I've used it a few times without any problems other than the long wait.
  8. mytek
    I spec'ed a CMOS version Z80 for my CV-NUC+ design. No reason I see that this CMOS version won't work for the the CPM board as well, since I'm using it to substitute for the original lower speed NMOS part in the ColecoVision. But you're right, I see a last time buy of 6/14/2024 at Digi-key for that part. However they still have over 1,500 in stock, so I would think they would sell off the stock they have. Mouser also has a bit over 600. Time to stock up Digi-Key P/N: 269-3895-ND MFR P/N: Z84C0008PEG CMOS Z80 1 Core, 8-Bit 8MHz 40-PDIP Octopart Search
  9. mytek
    Already exists in your 1088XEL and 1088XLD
  10. mytek
    ST Mouse Alternatives This works well for USB mice: Atari-Quadrature-USB-Mouse-Adapter I also incorporated this chip into one of my projects CV-NUC+ to take the place of the roller-controller. I found that quite a few Logitech wireless mice functioned properly. And for those that don't wish to build their own, there's also the MouSTer.
  11. mytek
    I missed this question. Assuming the check is only made once upon SGM initialization, your plan seems like it should work. Actually that's pretty ingenious 👍
  12. mytek
    I think there were a few, but you're right in assuming this wouldn't be much of an issue. Most likely you can just leave the 32K RAM as always active, and the SGM games will work just fine, as well as most of the others. It just ends up looking more like an Adam.
  13. mytek
    Nice project. First of all I gotta say you out did me on the smallness factor for sure. That first version board is so small and cute, plus it looks fairly simple circuitry-wise 👍 I don't know if this helps or not, but here's what I did for SGM capability... Protel CPLD Schematic CV-NUC+MSX V1.5.pdf MSX_mmu_V1.5.pld Although it looks like you already have a handle on it. I did run into an issue with my implementation where some physical SGM carts didn't see a valid SGM. However those same games when run as a digital download on an AtariMax Ultimate SD cart worked just fine. Aww you're now getting closer to my board footprint. Adding features tends to do this I too tried using that chip, but it failed to work with virtually every SGM game I threw at it. Too bad since it drastically reduces the size required.
  14. mytek
    Just my 2 cents... I agree with what has already been said about the time involved prepping parts and soldering, plus if you are doing it yourself there's a lot of different parts that need to be ordered. It all takes time. However if you want a challenge, then opt for DIY. there's nothing better than the feeling you get seeing it boot up for the first time knowing that you built it.
  15. mytek
    The Brewing Academy used to make pre-assembled and tested units. However I don't think they ever sold just the assembled PCB. Of course anyone can submit the board gerbers and BOM to any PCB manufacturer with assembly services to have it made, but it won't come back complete or tested (its those pesky Atari made chips like Pokey that'll be missing). I would also suggest pricing this with a few different vendors such as JLCPCB, ALLPCB, PCBWAY to compare prices. Hint: PCBWAY is not always the cheapest.
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