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Zerosquare

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Everything posted by Zerosquare

  1. This may be useful, too: http://www.atarimuseum.com/videogames/consoles/jaguar/jagfiles/VLM.zip (check the CDBOOT files) And this: https://www.jagware.org/jag_uploads/dev/curt_vendel_jagfiles/JagCDfiles.zip (includes the CD BIOS sources) As CJ said... good luck.
  2. No. No. Yes. If you're sure your wiring is correct and that the monitor does support 15 kHz, your issue may be the fact the Jaguar's vertical sync pin actually outputs composite sync. Your monitor may not support the horizontal sync + composite sync combination. Try this instead: 5B Composite sync → VGA pin 13 VGA pin 14: not connected If that doesn't work, try the opposite: 5B Composite sync → VGA pin 14 VGA pin 13: not connected
  3. Sorry, I'm out of ideas... there must be a more serious fault somewhere else, but this is getting too complex for remote diagnostic. Don't throw it in the trash though, at worst it can be useful for spare parts.
  4. Last try: check continuity: - Pin 58 on U15 ↔ pin 1 on U5 - Pin 59 on U15 ↔ pin 12 on U10 - Pin 60 on U15 ↔ pin 3 on U5
  5. Try desoldering U10, and connecting pin 12 to pin 9.
  6. https://www.retrogamingcables.co.uk/atari/jaguar/atari-jaguar-rgb-scart-cable-cord
  7. Tempest 2000 has autofire built-in. But its bullet pattern has a "pause" in it, so an autofire controller may make the game easier.
  8. Shows how little you know CyranoJ. He's quite a character.
  9. This is normal: http://mdgames.de/jaggc2ic.htm
  10. The only thing needed for the Jaguar to turn on is two shorted contacts on the cartridge, so yes, it's bad contacts.
  11. Huh... no they don't. That don't make them bad games, but they're definitely not boxing in the same league. Perfect Dark, considered one of the N64's best games: Virtua Fighter 3tb, one of the Dreamcast's launch titles: Textures and 3D models are much more detailed on the second one.
  12. It's the first time I hear someone describe Checkered Flag as "playable".
  13. And Atari would tell you "nah, that's too expensive". When you look at the documentation for the Jaguar II, I think the designers themselves were well aware of what needed to be improved, and would have probably done it in the original Jaguar if they could.
  14. Zerosquare

    Mad Bodies

    Easy. Make a list of them.
  15. I don't see how it could be related to the ADC chip: it has no relationship to the display, and it does nothing unless the game explicitly uses it. Early Jaguars had a few manual modifications added to the PCB, including one involving the clock circuit ; that's the blue wire on the picture below: I don't remember seeing anywhere which problem it was supposed to fix, but maybe it was this one, and for some reason your Jaguar didn't get modified?
  16. No. The colors are definitely too weak in your capture. Check that your capture device's color saturation setting is at its default value in S-video mode.
  17. To reduce the number of wires in the cable, the Jaguar pad has 4 groups of buttons, which are read one at a time like this : 1) one group of buttons is selected 2) there's a small delay to allow the controller to react to the selection 3) the states of the buttons are read Since this is handled by the game, there's a possibility that the delay in step 2 for Missile Command is too short, and causes problems when the cable is too long. That would explain why the problem only occurs with that game, and only when using an extension cable.
  18. - Check if the supply voltage on U5 is correct (pin 5 is +5V, pin 4 is ground). - Check the voltage between the common point of R64 and R65 (AVREF) and ground. It should be about 3.3 V. - If you have an oscilloscope : check that the waveforms on pins 1, 2 and 3 are clean. Pins 1 and 2 are square wave clocks, pin 3 is a digital bitstream. If all those checks don't show anything wrong, U5 is likely defective.
  19. The schematic for the JagLink appears to be correct. I'd advise adding a 0.1µF capacitor between pins 15 and 16 of the IC, to match the recommended schematic shown in the datasheet. If you can't get the LT1181ACN chip, a MAX232A will work as well. For the JagLink II, here are some pieces on info: https://atariage.com/forums/topic/242984-jaglink-ii-schematic/
  20. Check the audio signal on pin 6 (left channel) and pin 8 (right channel) of U5 (located on the bottom left of the PCB). Is it distorted as well?
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