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Found 12 results

  1. While browsing the web, I found this picture: It looks like someone is working on remake of full size 800XL motherboard. Source: https://ezcontents.org/atari-800xl-pcb-remake https://twitter.com/ezcontents Did anybody heard about it before or know this person?
  2. Hi all. First time here, hope to find help - i'm pretty new to cleaning retro electronics, so help would be most welcome :-) I've just bought a Ti99/4A from 1981 (silver) and it works fine, but is in dire need of a good cleaning. Do you have any good advice before undertaking this task (related to the Ti99/4A)? And on a more specific note, does anyove know if there is a CMOS battery to be aware of? Thanks!
  3. We've finally finished the reverse-engineering and testing of the open-source Aquarius motherboards. Enjoy them in good health, and promote the platform! https://github.com/1stage/Aquarius-Motherboard-1-1-0
  4. Hello guys! I need your help Atari 800, ATARI 800XL/600XL owners! If you guys own a caliber I urgently need to know which size in millimeters (or even better in keycaps unit 1U) the following keys: ATARI 800: - CONTROL key (to my measurements using pictures found on internet) 1.5U - LSHIFT key 1.75U as well as the RSHIFT - FUNCTION KEYS (Select, Start...) 1.5U - CLR SET TAB key 1.5U - RETURN key 1.5U ATARI 800XL - CONTROL key 2.0U - LSHIFT key 2.25U - RSHIFT key 2.0U - CAPS LOWR key 1.25U - RETURN key 1.75U - ESC key 1.25U - FUNCTION KEYS are spaced as 1U keysize. The only correct keyboard I can check is the Atari 130XE style... In attachment the PDF layouts of those keycaps (used by MaxKeyboard) and the keysize in keycap units. Please help me, Gianluca atari-800-xl-style-maxkeyboard.pdf atari-xe-style-maxkeyboard.pdf
  5. SIO2

    IMG 20150520 120641

    From the album: SIO2 Projects

    32k 7800 PCB rev c
  6. ivop

    SIO2PC PCB

    I have been back using my Atari 800 XL for about six months now. I bought a MyIDE cart to backup all my old floppies. Most of them were still readable. I did not really like the MyIDE cart though. Well, the cart is fine, it's mainly the patched O.S. It's a pity it doesn't support mixing SIO and IDE devices very well. So, I dug out my old SIO2PC cables. I had one MAX232 version and one using an MC1489. Both looked like crap (they were soldered very badly) so I decided to rebuild one. I "designed" a small PCB for the MAX232 version. Here it is: Schematic: PCB: (normal and mirrored version) Component placement:
  7. Hi all, I am hoping someone on here with some experience repair an asteroids PCB can help me troubleshoot a minor issue I am having. My left rotate is sticking intermittently. I have replaced the buttons so I know it is a problem on the logic board but I don't know where to look. Every once in a way the ship gets stuck rotating left and then i can rotate right and it will eventually fix itself during game play. It only crops up once in a while. Any ideas?
  8. Just bumped on this in ebay. Prototype revisions of atarisoft super storm game http://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5574883395&toolid=10001&campid=5336500554&customid=&mpre=http%3A%2F%2Fwww.ebay.de%2Fitm%2FTI-99-4A-SUPER-STORM-Texas-Instruments-SUPER-Rare-Prototype-Video-Game-Cartridge-%2F150983851385%3Fpt%3DVideo_Games_Games%26hash%3Ditem232756bd79
  9. SIO2

    IMG 20150520 120605

    From the album: SIO2 Projects

    32k 7800 PCB rev c
  10. I recently picked up a 5200 4-port. It's missing several case screws. Can anyone confirm the correct screws used for the case? I think the screws that came with this 5200 are type b #6-20 3/4 sheet metal screws. Is that what it should be or perhaps these were used to replace the original screws that were of a different type? Here's what was in my 5200: It didn't have a power supply, but I found one elsewhere. It's an 11.5v version. I tested it with a multimeter and it's outputting 14.5 volts. From what I've found the voltage regulators in both the case and the switchbox should be capable of handling over 30 volts. Do I have any reason to worry about using the power supply? 3 volts over seems like a big difference, is that typical or should I start looking for another power supply? The traces (or is it the soldermask) on the back side of the board on is wrinkly (see the POKEY to C104 wire image below). Is that normal or is it a sign of something I need to be worried about? It looks like the VCS adapter compatibility mod was applied to this board, but I also see a capacitor between pins 1 and 17 on the POKEY and a wire on the underside between pin 1 of the POKEY and C104. Is this a known mod? Any idea what it's for? Trying to smooth out power to the POKEY perhaps? In the middle of the rat's nest that is the VCS mod, I see a resistor and a capacitor (?) wired in parallel from between the two resistors connecting R11 and C10 as part of the VCS mod. There's also a diode wired to either side of R10. Any idea what they're for? The parts side of the pcb, marked CA018087, has no revision. The solder side, marked C018085 is rev 7. I will probably apply the mod to separate the power from the RF. I was also thinking about doing the mod for composite and/or s-video, but doing that would make the VCS mod pointless, right? If I did the composite/s-video mod I could pull the VCS mod out. If I did that would I need to reconnect pin 24 on the cartridge slot to ground? Thanks for any help/information you can provide. I hope to get this 5200 up and running soon.
  11. Hi All, Last year (before I started developing the Ultimate Cart) I decided to have a go at assembling some homemade cartridges using the Pixels Past circuit boards: http://www.grandideastudio.com/pixels-past/ It took me a while to get the Gerber files provided in a suitable state to upload to OSH Park - there was a missing board outline file, and the drills file needed editing. In case anybody else ever fancies trying to get some of these boards produced from OSH Park, I've attached the known working zip file of the Gerbers that I used when I got my boards made. Robin pp_atari8bit_gerbers_OSHPark.zip
  12. i watched an LGR video on this. but i can only afford a PCB. is there a way to play an arcade PCB like Pac-Man straight from the board without a SuperGun?
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