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About jdgabbard

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    Tulsa, OK

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  1. Forgive me if I’m mistaken, but he’d need either a FDD/HDD solution or one of the SD/CF Carts to run Sofarun. I’m thinking he just has a Mapper Cart.
  2. I don’t have any experience with it. But I’m a novice when it comes to the MSX. There are probably more tricks for that system than any other minus the PC and C64.
  3. Youxia, I have an SD-512, I’m I haven’t used the one that you bought, but as I understand it it breaks down like this: There are two types of ‘Mega’ cartridges: MegaMapper, and MegaRAM. A MegaRAM cartridge is just auto-detects as additional system memory (which may or may not be required for running MSX-DOS). The MegaMapper is require for loading games into memory, but also requires MSX-DOS or Sofarun. That said, with my limited experience on my own system, most of the stuff will configure automatically in Sofa. There are a few settings to redirect audio to the various audio standards and the like. But really you’ll just have to play with it. My setup is an Omega Home Computer. So it may differ a little from your machine. As I have 512k of RAM on the main board, and use the SD-512 as a mapper.
  4. They’re the DIN model. Back when the 8-bit guy did the video on them I tracked down where he got them from and bought a few, then shared the link. He shortly after bought the entire stock and was selling them on his website for 10x the price. 🙄 I don’t have a C64 to compare them to, so I’m not sure how well they’d fit.
  5. Found this: https://www.cgtrader.com/3d-print-models/hobby-diy/electronics/breadbin-commodore-64-enclosure-3d-print-model This guy has printable models for the C64 and the C64C. So I may see what software he designed in and see if he'd sell the design files instead of the STLs. But, looks like that might be a better bet for me than hacking an original case. If I can get the original files, and modify them for the VIC-20, it'd be perfect.
  6. Well, as for a keyboard, there is this guy... If he's not going to sell them he may be willing to allow others to use his gerbers: https://www.breadbox64.com/blog/the-mechboard64/ As for the case, the 64C case might not work very well since I think the VIC-20's plate on the right had side is substantially different...I could be wrong. I guess it could be cut and hacked to make it work. Either way, shipping over from Europe isn't the best with the guys peddling them. I'd almost rather 3D print a case for the price. Especially since I now have a printer with a massive build volume (330x330x400).
  7. I have several VIC-20 mainboards in my collection. However, what I do not have is cases for these. I know there was a group buy on 64C cases several years ago, and that their still available through Europe. However, I seemed to remember someone trying to get a campaign together for breadbin style cases. If my memory serves me, I should be able to use the C64 Breadbin case, and simply extend the cartridge slot opening. But, I'd prefer not to butcher an original case if possible. Anyone have any suggestions? *EDIT* If anyone even knows of a STL for a Breadbin case that is pretty close (I've only found two, neither are designed as a replacement, only as models) I could 3D Print it, and I'd be fine with that option. I'm not really worried about having something pretty, just usable....
  8. Not sure if anyone here has the knowledge to have a discussion on a technical level concerning the MSX standard. But I have a few questions concerning the various slot signals. 1) I see very few references to the SW1 & SW2 signals, other than they should be connected together on the cartridge pcb. However, no mention of where they go, or what they do. I'm assuming that there is some bit in some register set or reset. But I can't find any reference to it. Anyone have any idea? 2) As far as CS1, CS2, and CS12, I am assuming that these three select lines function independent of individual slots? I.e., they should be active on all slots at the same time, and not gated to specific slots? 3) SLTSL seems fairly easy to generate. My understanding is that the register A8h provides the 2-bit slot number for pages 0-3 of the 64k of memory. So I should be able to use a 1-to-4 decode on A15 & A14 to create my page select lines, and then just gate them properly with the A8h register to have the possible outcomes. (Been working on a truth table, but it going to be fairly extensive. This could probably be implemented with a fairly fast EEPROM for the logic). I understand how the decode works I think. I just want to verify I am not missing anything here. Any traps for noobs? If you're wanting more information as to the scope of what I'm doing, I am designing an expansion adapter for my MSX1 to open up Slots 2 & 3, possibly decoding one to the 4 secondary slots.
  9. I approve of this message. 😀
  10. Nice, glad to see it is well accepted. As for the replacement switch, what are people moving to? I could probably design it, but would need to know what I'm looking at. Let me know how it turns out. I'm limited by the capabilities of my printer, so if I need to make any changes, I'd like to know.
  11. I recently designed a replacement for the power switch for the TI-99/4A. And thought I would give it to the community. I have hosted it on Thingiverse here: https://www.thingiverse.com/thing:3697972 But I have also attached a photo. It's not perfect, but good enough compared to jamming something in the hole to turn on/off the computer.
  12. Finally got my 3d printer back up and working. So I have finished designing the case for the SNES-2-GP.
  13. I think there is a certain level of truth to this. One of the biggest problems I see in much of the vintage gaming and computing community, where it concerns people designing and selling projects of their own, is overestimating the market. They will have a good idea, and try to bring it to fruition, only to discover no one buys it. Why? Well, it could be due to price point...it simply isn't worth it's cost. Or it could be due to practicality. Possibly it is a redundant product, where another better or cheaper solution exists. Or maybe it simply fills a niche that the vast majority of gamers simply do not fall into. Whatever the case, as a gamer, it's easy for us to put the blinders on when we have something in mind that sounds like a good idea. Its much more difficult to take the Warren Buffett approach, and look at the product for it's potential.
  14. It's possible, I may look into it. If I were to improve this, I think simply adding a method for variable current sinking so that it could emulate true analog values would be a must. Which would go well with Playstation analog sticks. So it's possible I might do something like that in the future. But the cost of bringing a product to market can be high. You don't want to guess what the cost on this project so far has been....not even counting my time... It's definitely a labor of love, fueled by the desire to give back a little of what I have benefited from in the various computing communities on the web.
  15. Yeah, I saw that. It threw me off for a moment, as I got the notification of what it was after being notified of the dollar amount. Thanks for the support though! And Ill try to get them in the post this afternoon.
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