Zerosquare

😛 I finally dug out the oscilloscope and measured the signals. Hsync is a 3V high, 0V low signal (so it's valid TTL indeed) : Composite sync is a 5V high, 0V low signal: So... it should work fine with the 78HCT86. I don't know why your monitor doesn't like it, and I don't have a similar one so I can't test it here. Sorry. Regarding the "CGA" converters, I don't know why they're advertised like that. CGA was a digital RGB video standard which supported only 16 colors ; those converters are mostly used with analog RGB sources. There were some non-CGA analog monitors with the same connector (Atari and Commodore computers, among others, used them in the 1980s), so maybe that's the source of the confusion.

You've been playing Supercross 3D again, haven't you?

A cheaper way is to use a single 2.5 A (or more) power supply and add an Y splitter, like this:

You don't like playing Pac Man?

It's Cinepak we're talking about. Don't get your hopes up too much

@cubanismo: you're right, I never noticed that the HSync signal is only 3V peak-to-peak, not TTL-level like the VSYNC/CSYNC one. Atari's fondness for weird hardware quirks strikes again... In theory it could be a problem, in practice I'm not sure. I'd have to do a simulation and/or get out the oscilloscope to find out for sure. I'll try to do that later. The 100 nF capacitor is not included in the package, and should indeed be in parallel with the power supply, physically close to the integrated circuit.

The one I have is this: Behind Jaggi Lines v1.06.0.bin The date is January 24, 1999. It includes the games. I'm surprised by the 2005 version mention on Matthias Domin's page. I don't recall ever seeing it, and to my knowledge @42bs didn't seem to be still active on the Jag scene back then.

These are the area of the board where signals are located. Top middle for most of the signals, bottom left for the audio ground one. Top side -- the location of the colored dots match where you need to solder the wires.

Hear that, CJ? "Downfall" is not a clear enough name. And the gameplay is way too complex to be remembered.

You can extract the MP3 files from the ISO using 7-zip: https://www.7-zip.org/ And convert those MP3 files into WAV files using Audacity: http://www.stenographsolutions.com/solution/index.php?View=entry&EntryID=130 (keep the project rate at 44,100 Hz to maintain quality)

They're 320 kbps MP3 files, so the difference in quality should be insignificant. You can easily convert them back to uncompressed audio if you like

Speaking of low expectations, remind us: what have you ever released on the Jag?

Yes, the hardware supports Z buffering and Gouraud shading... as long as you painfully feed it one scanline at a time. Because it can't even draw a single triangle by itself. You don't get any geometry support, either. And HLL is not an option because there is no standard 3D API. So, you want to play a Jaguar 3D game in 1920x1080? Disassemble the code, understand how its 3D engine works, trap the calls and forward them to the emulator's 3D functions (which you'll have to write, obviously). Then do it all again for the next game. And so on. Piece of cake, really.

I don't think a sync extractor would be useful here, since the sync signals are already available on the video connector. You could try extracting the missing VSYNC signal using 74HCT86 XOR gates: There's some power available from pin 11A on the video connector, but it's unregulated 9 V, so you'll also need a 5 V regulator to power the chip.

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.

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

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.

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

Try desoldering U10, and connecting pin 12 to pin 9.

https://www.retrogamingcables.co.uk/atari/jaguar/atari-jaguar-rgb-scart-cable-cord

Tempest 2000 has autofire built-in. But its bullet pattern has a "pause" in it, so an autofire controller may make the game easier.

Shows how little you know CyranoJ. He's quite a character.

This is normal: http://mdgames.de/jaggc2ic.htm

The only thing needed for the Jaguar to turn on is two shorted contacts on the cartridge, so yes, it's bad contacts.