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channelmaniac

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Posts posted by channelmaniac

  1. Posted

    I know there's a strong homebrew scene around the CV and was wondering if anyone has delved through the Z80 sound code for the arcade game Time Pilot '84? They have 3 of those chips on it with some optional caps that can be added in and out of circuit via some 4066 switches. No DAC or other sound chip. I figured it could lead to some interesting sound developments. :)

     

    The MAME team has documented the hardware pretty well.

     

    RJ

    (a non-programmer)

  3. Posted

    Hey everyone,

     

    Trying to find some values on a couple of items... First is a TI-99/4 computer, not 4A. Computer is tested/working... have the matching TI-99/4 monitor for it, but haven't tested it yet. I have the RF modulator, an AV cable I built, speech synth, Extended Basic cart/manuals, and 3 other carts.

     

    The other item is the Frog Stickers. I have a Frog Jump and found that, but not Frog Stickers.

     

    Yes, I'd sell these. Shipping would be from 75077, but would really really be hesitant to ship a monitor.

  5. Posted

    The system had a drawer on the back right side that you opened, placed the PCB from the cartridge inside, then closed and activated. It was a UV lamp that would erase the ROM while you went shopping. When done, you plugged the cartridge in, chose what game you wanted, and had it written to the now blank cartridge. You paid for the game code (cheaper than a whole cartridge) and went home to play.

    • Like 3

  6. Posted · Edited by channelmaniac
    add info

    Necro Bump from Hades... :)

     

    I had a VIC-20 ROMOX cartridge, still in the plastic bubble and cardboard package. I donated it to the National Videogame Museum in Frisco, TX.

     

    They now have the ROMOX programming station, but it's in rough shape. It's being restored and I've donated a motherboard, floppy controller, and power supply (It's based on an original IBM PC) towards the restoration. They sent the hard drive off and had all the data copied off before even powering it up.

     

    I'm helping to repair one of the proprietary cards in it that has damage from a leaking NiCd.

     

    If you have cartridges that you don't know what to do with, ping John Hardie. I believe his handle here is CX2K.

    • Like 3

  11. Posted

    There are 2 possibilities for the ULA chip: ULA2C184E or the newer ULA2C210E

     

    The older 184E doesn't have the back porch on the NTSC signal and many TVs display a very dark screen because of that. You can either try an old B&W TV or a composite video kit that recreates the missing signal.

     

    This composite video mod board works great and I've used 3 of them in the past: http://www.sellmyretro.com/offer/details/ZX8-CCB---video-output-for-ZX81-3712

     

    It fits inside the RF Modulator if you pull the guts out of it. :)

     

    RJ

    • Like 1

  14. Posted

    Picked up one of these at a computer surplus store while out on a business trip... Wasn't even sure what it was when I bought it. I only bought it for the chip clip and ribbon cable that was on it, but when I opened it up... WOW!

     

    "Diagnostic clip I, C 1980, Commodore, Made in USA"

     

    I couldn't find much for it online... so I sent pics and code dumps to Andre Fachat since his page said he was looking for info. Well, tonight I had some spare minutes so I traced out the board. Enjoy!

     

    Raymond

     

    post-20064-0-47950000-1496894262.jpg

  15. Posted

     

    That's a cool idea! I'd love to see snapshots of the table when its complete. :-)

    Ed

     

    Thanks Ed!

     

    I'm planning on posting lots of pics of the build as I go along with it.

     

    I've decided that the words Atari 2600 will replace the Magic City and the extra row of lights above it will have color stripes around them on the playfield representing the colored stripes in Breakout. As you hit the targets or roll over the lanes that spell out Atari 2600 that light row just above the letters will light up for each character. The 2nd row will start out white. The center target just below the 3 pop bumpers will have the Atari symbol painted on the playfield and when you hit that the 2nd row of lights will turn blue. Each time you hit a target the corresponding 2nd row light will change colors for the different colored rows in Breakout: Blue, Green, Yellow, Orange, Orange-Red, and Red then off (black)

     

    Score values will go up each time: 10, 20, 30, 40, 50, 100, then zero once the target light is off.

     

    It's ambitious and I have a lot of learning to do on using variables in Arduino code, but I know a few folks that I can ask about this if I get stuck. Dallas Makerspace rocks! :)

     

    Different playfield plastics will represent different games and the 4 upper ones have switches to count hits. I'm thinking of setting up skill shots so if you hit the Yar then hit the Atari symbol it's 200 points, same for hitting Missile Command then the Atari symbol, etc. I don't want too many points since the game only has a 4 position EM score reel.

     

    I have the art thanks to an Oklahoma member who scanned it at 600 DPI into a set of TIFF files. Now I just have to figure out how to actually get the files sized right and in the shape of the existing plastics. I'll have to lean on a local arcade friend whose father owns a printing business for how to do that. I'm paying him for the artwork.

     

    Raymond

    • Like 1

  17. Posted

    Hey everyone,

     

    I'm looking for ideas on some cool box art that isn't too busy, but yet represents some of the best games on the 2600 for a custom pinball theme I want to do.

     

    The pinball is a Magic City and the layout can be seen here

     

    The words Magic City would be replaced with ATARI 2600 and the star with an Atari logo and 60s/70s styled artwork of game elements used around the board. Text would be done in the appropriate fonts. All the game logic (electromechanical) is being ripped out and replaced with Arduinos and the NeoPixel RGB LEDs replacing all the old incandescent bulbs for greater ability to customize game play rules.

     

    There are 7 plastics around the playfield and I'm looking at Asteroids, Missile Command, Super Breakout, Video Pinball, Warlords, Yars Revenge, and Space Invaders for these and looking to see what favorites you might think would be better than those. I left Combat off since I felt the 4 section art would be too busy for small plastics and thought that Warlords catalog shot could be flipped left to right and used on both sides of the ball drain plastics at the bottom of the playfield.

     

    Thanks!

     

    Raymond

    • Like 2

  18. Posted

    Hey everyone,

     

    Rob Ivy stopped by with a pesky, dismantled Channel F that had some issues and oh boy, did it have some issues.

     

    It took a while to figure out the power problem and it was a first for me after all my years of repairing things: an intermittent bridge rectifier. The power would go on and off on its own. After that it was 3 of the 5 plunger switches not staying up enough to keep them from activating themselves then it was 3 missing coils. It was an adventure and Rob videoed the whole thing, edited it, put an intro graphic and my logo on it, and gave it to me for posting on my channel.

     

     

    Hope you like it. :)

     

    Raymond

    • Like 4

  19. Posted

     

    Hi Raymond,

     

    Amazing. I didn't know this was yours! Thank you for sharing this with the community. :thumbsup: :)

     

    I would also I like to say, welcome aboard the Neo-Geo thread :)

    Enjoy your time here and partake in the many discussions that the Neo-Geo thread has to offer. Your always welcome to explore our previous pages to conduct research for yourself to help you make more fantastic Neo-Geo videos in the future.

    Our maintenance & repair videos would certainly be to your liking to help benefit you. :-D

    As always, keep up the great work. looking forward to more postings from you Raymond. :)

    Anthony...

     

    I may be able to teach a bunch of folks a few things on repairing the Neo Geo. :)

     

    My repair logs are out here: http://newlifegames.com/nlg/index.php?board=25.0

     

    Check the SNK / Neo Geo repair thread. It's 15 pages of repair entries.

    • Like 1

  20. Posted

    Hey!

    That's me. :)

     

    Thanks for posting it on the thread. When I get back from this Asia/Australia trip for work I'll toss up another video showing troubleshooting audio circuits with that trusty logic probe with audio.

     

    I have a Ladybug I fixed that had a problem in the audio amp circuit. The logic probe with audio beep made short work of diagnosing that the problem was in the analog part of the circuitry.

     

    Raymond

     

    Hi guys.

     

     

    Back again showing maintenance & repair videos. This morning, were with Arcadecomponents.com showing us how to troubleshoot the audio outlet concerns for an MVS board!.

     

    From the description,

    " There's an easy shortcut to use when troubleshooting audio output issues on a Neo Geo MVS board: Use a logic probe with audio beep functions.

    In this video I demonstrate how to use the logic probe to determine if an audio problem is in the digital or analog section of the circuitry."

     

     

    Anthony...

    • Like 1

  25. Posted · Edited by channelmaniac

    Listing an Atari 850 interface (no PS) and an Atari SF354 drive.

     

    These are untested as I don't have the cables/software to test the 850 and no computer or cable to connect the drive to.

     

    Items are located in the Dallas, TX, area. Please consider shipping costs when making an offer.

     

    Would be interested in trading for TRS-80 Color Computer 1/2/3 related items... If I don't have them already. :)

     

    post-20064-0-22155500-1403450999_thumb.jpg

    post-20064-0-58412800-1403451014_thumb.jpg

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