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Yoruk

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About Yoruk

  • Rank
    Star Raider
  • Birthday 04/17/1988

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  • Gender
    Male
  • Location
    France
  • Interests
    Computing, electronics

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  1. The Atarimax is a bit expensive for me... My objective is more to find a cheaper way to have like, ten cartridges to put on my shelf, near the console. I also love to restore damaged carts and replace labels...😋
  2. Hello there, I just bough an original CBS ColecoVision, PAL version, in untested state. I hope that I will manage to repair it, in case of issues. Meanwhile, I'm starting searching for games. Unfortunately, as always here in France, vintage games are quite expensive and difficult to find. I had a similar problem with Intellivision games. Fortunately, someone on this forum manage to sell me a bunch of raw cartridges PCBs, as he took the shells to create an homebrew game. This was great for me as I have now a lot of games. Without enclosure of course, but I am planning soon to 3d-print cartridges shells. So my question is, by any chance, did someone here manage to have bare pcbs that he may want to sell ? Thanks in advance !
  3. Ok I manage to burn chips with the 8k game "Droids", and it's a success. Sounds, music, gameplay, it works great. Absolutely same behavior between the computer and the emulator (event if I didn't exactly understand how to play 😊 )
  4. And.... it's a victory ! 😊 I manage to finally assemble and test my prototype yesterday. Burning the proms, populating the board... First I was a bit afraid because the board was almost completely inside the VIC, so it was not easy to probe signals with my scope. I just managed to check that the 5v and the ground seemed OK and at the good places. Then I checked some addresses contents with some PRINT PEEK and it was ok. Time to install all the chips and put the autoboot... And the game starts ! I was a bit confused at first : ok the game screen was here, but the computer was generating a continuous sound... I was afraid that it freezes. But after a couple of seconds the screen changed to an other one. I tried the game file in an emulator, same behavior, so maybe there is a problem with "Amidar". I'll try an other game to be sure, but meanwhile it looks like that my board is working fine. 🙂 A big thanks for everybody !
  5. DIY Intellivision overlays. Just a color laser printer, a paper laminator and scissors :

     

    image.thumb.png.a62767658d75a25a1478dc75dce00cb1.png

    1. BydoEmpire

      BydoEmpire

      I print my own w/ a color ink jet, and then laminate them.  I print slightly smaller so there's a mm on all four sides to give the laminate space for edges.

  6. Ok I manage to DIY create a nice batch of overlays. 1 : I downloaded the missing models of my collection. I quickly loaded each one into Gimp to fix cropping, orientation and clean dirty spots. 2 : I created a layout pattern in Inkscape to put the overlays together and resize them at the good size (55*90mm). I also added cutting lines. 3-Printed them out, then laminated. I noted that a standard lamination, with a transparent sheet on both sides of the paper give a result too tick, so I use only one side of the laminated sheet. The result is quite nice, even if the result is not completely flat. 4-Used a paper cutter to cut out each overlay, and use scissors to cut the round edges. And here we are ! Fits perfectly into the controller.
  7. By the way, did actually ALL games had overlays ? Or just a couple of them ?
  8. Great ! Exactly what I was looking for. Many thanks ! 😃
  9. Hello there, Is there a good online source for high-res or medium-res scans of game controllers overlays ? I've seen some topics on the subject here, like this one : Or online databases here (low res unfortunately): http://www.intvfunhouse.com/overlays/table.php I can understand that some people spends some time to make them high-res or to scan them and they doesn't want to put put them online, or maybe there are some copyright reasons... I'm searching some because I have some loose games without overlays, I wanted to try DIY printing... Any ideas ? Thanks 😊
  10. No ideas ? Meanwhile, here are some pictures of my prototype. I use a home made software that analyze and convert PCB pictures designs into a Eagle-CAD project. Holes and via are automatically detected, it also computes signals names continuity. 🙂 Original design from the book : And my prototype.
  11. Hello there, I am currently working on a simple speech synthesizer circuit for my C64. It works with the SP0256 allophone chip. I didn't created anything, I just re-created the board presented in the "Commodore 64 interfacing blue book" by V. J. Georgiou. A full project with ready-made pcb is presented. Here are the schematics : As you can see, nothing complicated. The code is also available in the book, is more or less POKE commands to give the circuit the allophone index. Unfortunately, it doesn't works (weird sound). I manage to probe some points in the circuit with my scope: -the reset goes from low to high at the C64 boot, -some data is incoming on PBx data pins when the program is running, -when powering the computer on, even if nothing is "asked", there is some garbage signal on the "Dout" pin of the IC. (Strange ?). When playing the allophones, I can hear (and see) some variations in the noise, but nothing clear. -my crystal is a 3.27 one, didn't manage to find a 3.12. As explained in the project article, it should only make the voice "higher". I didn't have a nice TTL clock signal on pin 28 or 27, but I think it's normal. (I see high speed "vibrations") My opinion is to think that the SP256 is damaged. I found it on ebay. Looks "new" but I'm not sure at all if it may be already used. Maybe I'll try to buy a new one from another seller... Is someone here familiar with this chip ? Thanks !
  12. I've found some ROM dumps here... http://www.zimmers.net/anonftp/pub/cbm/vic20/roms/ But I'm not familiar with the ".prg" format. The author says that "The files are in PRG format, i.e. the first two bytes contain the starting address.". Looks like this sample starts at $A000 (witch make sense for a game to have the autostart) : This file length is actually 8194 bytes... So I think that I just have to remove the top two bytes before flashing my eproms ?
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