Search found 49 matches

by Warren Ondras
Sun Jun 23, 2019 2:04 am
Forum: Discussion
Topic: Dexter and Data East boards?
Replies: 5
Views: 16976

Re: Dexter and Data East boards?

Wow, that's wild! I had never seen or heard of this board before. The "CN5" port looks very much like an LD-V1000 connector. It's the same as the one on the single-board version of Cobra Command for conversions, and the 74LS374 chips next to it would be appropriate for interfacing with an ...
by Warren Ondras
Sat Nov 03, 2018 2:26 am
Forum: Discussion
Topic: Dexter and Data East boards?
Replies: 5
Views: 16976

Re: Dexter and Data East boards?

Hi! The basic problem is that the Data East hardware for Begas/Cobra/Road Blaster requires the laserdisc player to sync its video to the graphics output of the main PCB, instead of the other way around as most games do. The video output from the Raspberry Pi can't be synced to an external source, so...
by Warren Ondras
Tue Sep 04, 2018 6:44 pm
Forum: Discussion
Topic: MACH 3 problems (from customer email)
Replies: 2
Views: 14135

Re: MACH 3 problems (from customer email)

Hi Steve, The fact that you can get into diagnostics and get 12345 on the frame adjust screen means that the game is definitely controlling Dexter. The game sends a command to seek to frame 12345 and freeze. And yes, the 1/8" plug that takes a fair amount of force to insert is how the game cont...
by Warren Ondras
Mon May 01, 2017 10:29 pm
Forum: Discussion
Topic: esh on dexter: cpu sound fx generated
Replies: 2
Views: 10140

Re: esh on dexter: cpu sound fx generated

Dexter doesn't have any sound effect capabilities. It only replaces the laserdisc player. Are you missing a piece of the original hardware? hello, when you insert coin ,gain a life or jump in the platform scene there s' a particular sound like a 'tuuuuuuuu' ot r 'tac-tac' generated by the sound boar...
by Warren Ondras
Sat Apr 22, 2017 4:20 pm
Forum: Discussion
Topic: dexter manager doesen't work on laptop wifi internet
Replies: 4
Views: 12534

Re: dexter manager doesen't work on laptop wifi internet

erwing wrote:hello,
but how to enter the settigns menu?
There isn't anything to configure on the Dexter hardware. It always uses DHCP to configure itself.

I generally have poor results when using PC-based connection sharing / bridging. It is much better to use a long ethernet cable, or a hardware wifi bridge.
by Warren Ondras
Wed Apr 19, 2017 5:28 pm
Forum: Discussion
Topic: RCA Connector
Replies: 2
Views: 10149

Re: RCA Connector

The BNC to RCA adapter looks like this: https://www.radioshack.com/products/bnc-adapter-2 https://www.amazon.com/Monoprice-BNC-Male-Female-Adaptor/dp/B006VK8IEI/ref=sr_1_3?ie=UTF8&qid=1492619072&sr=8-3&keywords=bnc+to+rca Once you have that, you can use a standard red-white-yellow audio/...
by Warren Ondras
Wed Apr 19, 2017 1:14 pm
Forum: Discussion
Topic: RCA Connector
Replies: 2
Views: 10149

Re: RCA Connector

Hi! That is a "BNC-to-F" adapter, which is needed when connecting Dexter to Cliff Hanger or MACH 3. (The PR-8210 player used in these games has a different connector from all of the others.) To connect to a standard TV, you need a similar "BNC-to-RCA" adapter, and a standard RCA ...
by Warren Ondras
Mon Feb 06, 2017 3:36 am
Forum: Discussion
Topic: Firefox Sync Issue?
Replies: 39
Views: 95326

Re: Firefox Sync Issue?

Is there an adjustment that I can "tweak" and try to get this working properly? I looked through the schematics earlier, and I didn't see any adjustments that would help with vertical sync. I suspect C14 on U3 in the "Sync Logic" section might be out of spec, so the vsync pulses...
by Warren Ondras
Sun Feb 05, 2017 3:25 pm
Forum: Discussion
Topic: Firefox Sync Issue?
Replies: 39
Views: 95326

Re: Firefox Sync Issue?

BTW, this is a sitdown boardset that I converted to an upright w/ switcher P/S, (standard 15A Happ). I have W1 and W2 cut with the 15ohm 10w resistor installed at R205 on the NTSC PCB and SP1 jumpered and SP2 cut on the main PCB........... I forgot to ask... If you're using a standard switcher, wha...
by Warren Ondras
Sat Feb 04, 2017 5:39 pm
Forum: Discussion
Topic: Firefox Sync Issue?
Replies: 39
Views: 95326

Re: Firefox Sync Issue?

Well, the "good" news is that this isn't the same problem you were having before... Previously, it was losing horizontal sync whenever the laserdisc player was busy. Now it's losing vertical sync, somewhat sporadically. It might be that the vertical hold control on the monitor is near the ...
by Warren Ondras
Sun Jan 22, 2017 5:06 pm
Forum: Discussion
Topic: UK buyers - how to adapt power supply plug?
Replies: 2
Views: 11379

Re: UK buyers

Hi! Yes, the power adapter is multi-standard, so all you need is the physical adapter with the right connector (no transformer, etc.)

Enjoy!
by Warren Ondras
Thu Dec 01, 2016 12:41 am
Forum: Discussion
Topic: Firefox Sync Issue?
Replies: 39
Views: 95326

Re: Firefox Sync Issue?

Wow, that memo is dated April, 1985... I didn't think there were any Firefox machines still in operation by then! The resistors lower the voltage before it gets to the linear regulators, so the regulators will produce less heat. The jumpers bypass the resistors when the voltage is already low "...
by Warren Ondras
Wed Nov 30, 2016 2:54 pm
Forum: Discussion
Topic: Firefox Sync Issue?
Replies: 39
Views: 95326

Re: Firefox Sync Issue?

BTW, I can understand the need to strap the boards for either a switcher or linear power supply but why is there the additional strapping changes needed to the NTSC PCB for the Upright vs. Sitdown, specifically the addition of the 15ohm 10w resistor at R205? Which rev of the schematics are you look...
by Warren Ondras
Tue Nov 29, 2016 2:31 pm
Forum: Discussion
Topic: Firefox Sync Issue?
Replies: 39
Views: 95326

Re: Firefox Sync Issue?

One more thing to try is removing the RFI board and plugging the connectors directly into the main boards. (Make sure the orientation is correct!) All sorts of flakiness can sometimes be eliminated this way.
by Warren Ondras
Sat Nov 26, 2016 3:40 pm
Forum: Discussion
Topic: Firefox Sync Issue?
Replies: 39
Views: 95326

Re: Firefox Sync Issue?

Excellent. You might try using the logic probe on P43 pins 10, 12, 22, and 23, to see if all of them are active, and if anything changes during the loss of sync. I use the old Radio Shack logic probe that beeps on signal changes, which is very handy for getting a feel of what is happening. I guess a...
by Warren Ondras
Sat Nov 26, 2016 4:56 am
Forum: Discussion
Topic: Firefox Sync Issue?
Replies: 39
Views: 95326

Re: Firefox Sync Issue?

I agree that Dexter's video wouldn't be dropping sync, but could a missing acknowledgement signal on the 25-pin interface cause sync issues? On my test setup, if I unplug the 25-pin cable from Dexter, I lose vertical sync, even though the BNC video signal is still connected. I don't know exectly why...
by Warren Ondras
Thu Nov 24, 2016 5:53 pm
Forum: Discussion
Topic: Firefox Sync Issue?
Replies: 39
Views: 95326

Re: Firefox Sync Issue?

I will replace the cable ASAP but in the mean time, yes I have both a Logic Probe and an Oscilloscope. Would I be able to use these to determine what is causing my issue? Possibly, if we can figure out what to check. I suspect the problem is in the "full interlace sync generator" (pages 3...
by Warren Ondras
Thu Nov 24, 2016 1:18 am
Forum: Discussion
Topic: Will Dexter work with American Laser Games and multiRom kit?
Replies: 3
Views: 11345

Re: Will Dexter work with American Laser Games and multiRom

We've been discussing a few possibilities, but nothing definitive yet. (No promises that it will even happen at this point...) I think best case would be if someone could hack the game ROMs so they send a custom "disc select" command at startup, but I don't know if anyone is willing/able t...
by Warren Ondras
Wed Nov 23, 2016 1:54 pm
Forum: Discussion
Topic: Firefox Sync Issue?
Replies: 39
Views: 95326

Re: Firefox Sync Issue?

Just a thought - could a defective coaxial cable from the Dexter to the RFI PCB cause this sync issue? I think that's pretty unlikely. If the loss of sync was random, maybe, but instead it's matching the laserdisc skips. (You can't see the skips; that's the beauty of the Philips player, and now Dex...
by Warren Ondras
Tue Nov 22, 2016 3:03 pm
Forum: Discussion
Topic: Firefox Sync Issue?
Replies: 39
Views: 95326

Re: Firefox Sync Issue?

+4.94V is probably sufficient, but good clean power connections will make it more reliable over time, so it's still a good thing.

Do you have any additional boards you could swap in for comparison? I suspect you have a problem on the graphics PCB.
by Warren Ondras
Mon Nov 21, 2016 2:17 pm
Forum: Discussion
Topic: Firefox Sync Issue?
Replies: 39
Views: 95326

Re: Firefox Sync Issue?

Interesting problem... I encountered something similar on my Firefox test setup -- loss of vertical sync during skip or freeze commands. I spent a lot of time testing and troubleshooting, but in the end it turned out to be due to low voltage on the graphics board (not the NTSC board.) This board gen...
by Warren Ondras
Tue Nov 15, 2016 1:47 pm
Forum: Discussion
Topic: Dexter with Hi Tech card, & Limited Edition ROMs
Replies: 18
Views: 36206

Re: Dexter with Hi Tech card, & Limited Edition ROMs

I suspect a bad Raspberry Pi, or a bad SD card. The "Bus error" message in your screen pic should never appear under normal circumstances. This doesn't explain why it works when you power up Dexter after the game instead of at the same time, though. Any chance you're using the dreaded Omni...
by Warren Ondras
Tue Nov 08, 2016 2:43 pm
Forum: Discussion
Topic: Firefox having gameplay but no laserdisc background?
Replies: 1
Views: 8711

Re: Firefox having gameplay but no laserdisc background?

Firefox will "play" with a black background even if there is no laserdisc player at all, so it's hard to say exactly what's working and what isn't. I guess that means starting with the basics: - Is Dexter's "Pulse" light flashing? - Is Dexter set to VP-931 mode? - Are all connect...
by Warren Ondras
Tue Sep 27, 2016 6:18 pm
Forum: Discussion
Topic: Dexter Manager crashes on startup?
Replies: 1
Views: 8335

Re: Dexter Manager not Loading?

Greetings!

Can you try running it again? There was an update glitch that has been corrected. Thanks!
by Warren Ondras
Tue Aug 30, 2016 10:10 pm
Forum: Discussion
Topic: Dragon's Lair 2 beep is too loud
Replies: 1
Views: 8467

Re: Mini USB power or 5v power that came with Dexter

Greetings, Powering dexter from the Pi's USB power input probably won't change the output volume. (On some of the prototype boards, using the Pi's power jack would eliminate some hum and scratchiness in the audio. The final boards don't have this issue.) Whenever I've encountered a DL2 cabinet, the ...
by Warren Ondras
Tue Aug 30, 2016 4:50 pm
Forum: Discussion
Topic: esh+dexter snow effect on video
Replies: 3
Views: 11090

Re: esh+dexter snow effect on video

That's great news! Thanks for letting us know.
by Warren Ondras
Thu Jul 28, 2016 3:18 pm
Forum: Discussion
Topic: Dragon's Lair seeks 2-3 times instead of 1 time
Replies: 12
Views: 22988

Re: Dragon's Lair seeks 2-3 times instead of 1 time

Great! :)

You should be able to get a new cable from Shaun Wood:

http://wood1st.com/LaserCon/Extras/
by Warren Ondras
Mon Jul 25, 2016 2:08 am
Forum: Discussion
Topic: To heat sink or not to heat sink?
Replies: 5
Views: 20891

Re: To heat sink or not to heat sink?

My understanding is that in general, unless you are overclocking, heat sinks for the Pi are not necessary. Dexter doesn't use overclocking, and the CPU utilization is not maxed out, so the CPU isn't working particularly hard. Even with the slightly elevated temperature in an arcade game cabinet, I w...
by Warren Ondras
Fri Jul 22, 2016 2:21 pm
Forum: Discussion
Topic: Dexter worked for a few weeks and now doesn't
Replies: 5
Views: 16540

Re: Dexter Boot Probs

Hi John, Sorry you're having trouble. It looks like the main Dexter board is working okay, since the game still operates, but it's not getting audio/video from the Raspberry Pi. Here are a few things to try: 1. Re-seat the micro-SD card on the Pi. (Push to eject, push to lock.) Typically these pop o...
by Warren Ondras
Thu Jul 07, 2016 3:27 pm
Forum: Discussion
Topic: Firefox won't talk to the Dexter at all
Replies: 5
Views: 13402

Re: Firefox won't talk to the Dexter at all

Any luck with this? If it's still not working, can you post a video of what you are seeing on screen?