It is currently Tue Feb 20, 2018 2:19 am


All times are UTC [ DST ]




Post new topic Reply to topic  [ 14 posts ] 
Author Message
 Post subject: Diy Dragons Lair scoreboard
PostPosted: Thu Nov 02, 2017 10:55 am 
Registered User
Registered  User

Joined: Thu Jun 15, 2017 7:31 am
Posts: 4
I've built a diy dragon's lair scoreboard (like this one http://www.penguincentral.com/retrocomp ... board.html) and I'm having problems.
In general it is functional - it sort of resets when Daphne starts, it generally updates coins, lives, and scores. However there are a few consistent issues.
I think I've narrowed it down somewhere around the parallel port. Either the wiring is wrong, the connector is bad(?), or some software configuration issue.
I've actually built the board THREE TIMES with 2 sets of components and the issues are always the same.
The issues are:
1) LEDs 9,13 and 15 (numbering based on the schematics) seem to be stuck showing the same thing.
2) it fails to blink when changing players on two player mode - and by fails I mean yes it turns off and on but at the same time the numbers reset
3) there is flickering on some of the numbers

I'm using the latest version of Daphne on an old (Pentium M) Windows XP laptop. But I've also tested on a modern Windows 10 PC.

I would greatly appreciate any help.


Top
Offline Profile  
 
 Post subject: Re: Diy Dragons Lair scoreboard
PostPosted: Fri Nov 03, 2017 7:59 am 
Registered User
Registered  User

Joined: Mon Jul 15, 2013 2:27 am
Posts: 4
How did you get it working with Windows 10 with USB support?


Top
Offline Profile  
 
 Post subject: Re: Diy Dragons Lair scoreboard
PostPosted: Fri Nov 03, 2017 8:28 am 
Registered User
Registered  User

Joined: Thu Jun 15, 2017 7:31 am
Posts: 4
I didn't. I used the parallel port. I've got one of those atom mini-itx motherboards which still have parallel and serial ports.


Top
Offline Profile  
 
 Post subject: Re: Diy Dragons Lair scoreboard
PostPosted: Fri Nov 03, 2017 3:20 pm 
Registered User
Registered  User

Joined: Mon Jul 15, 2013 2:27 am
Posts: 4
This all sounds like flaws in your connections.

The flickering is a power issue. I just built a couple of these just to see if i could do it.

I had to check and recheck my traces, if the same issue is happening, you must be building it incorrectly. It's going to be hard to help you, as I can't physically see your connections to the led and the icm7218d's.

Are you running external power to the board?


Top
Offline Profile  
 
 Post subject: Re: Diy Dragons Lair scoreboard
PostPosted: Wed Nov 08, 2017 9:12 am 
Registered User
Registered  User

Joined: Thu Jun 15, 2017 7:31 am
Posts: 4
Thanks for the replies.

Yes I use external power - I've used a 2A USB charger and a 3A 5V switching power supply. Same result.

I've taken some photos of the boards I've built and uploaded them. On the first board I couldn't find reasonably priced MAN8940s so I used similar ones. I though this might be the problem so I bought MAN8940s and built the second board.

I disassembled most of the first board trying to figure out what might be wrong.
I'm not proud of the quality of the work but I'm still troubleshooting. I'll clean it up afterwards.

First board:
http://i613.photobucket.com/albums/tt21 ... g8yuvm.jpg
http://i613.photobucket.com/albums/tt21 ... 3calmr.jpg
Second board:
http://i613.photobucket.com/albums/tt21 ... zjztlj.jpg
http://i613.photobucket.com/albums/tt21 ... zyzr24.jpg
Cables:
http://i613.photobucket.com/albums/tt21 ... taps90.jpg


Top
Offline Profile  
 
 Post subject: Re: Diy Dragons Lair scoreboard
PostPosted: Mon Dec 11, 2017 4:32 pm 
Registered User
Registered  User

Joined: Thu Jun 15, 2017 7:31 am
Posts: 4
I'd appreciate any feedback if anyones got the time to take a look at the photos.


Top
Offline Profile  
 
 Post subject: Re: Diy Dragons Lair scoreboard
PostPosted: Mon Dec 11, 2017 10:52 pm 
DAPHNE Platinum Donator
DAPHNE Platinum Donator
User avatar

Joined: Fri Jun 01, 2001 1:00 am
Posts: 110
Location: Italy
I'm not sure but I wouldn't have used so thin wires. Those LEDs drive current and such wires are meant for low current signals. At least supply wires should be more thick.
Touch the wires while it's on and see if they get hot and test with a meter if the voltage drops across them.

_________________
Matteo


Top
Offline Profile  
 
 Post subject: Re: Diy Dragons Lair scoreboard
PostPosted: Tue Dec 12, 2017 5:27 am 
Registered User
Registered  User

Joined: Mon Jul 15, 2013 2:27 am
Posts: 4
what did you do to get the board to respond. I can't get it to do anything with the serial port.

One issue I ran into which might be your case, the icm's are bad, have you tried a different set?


Top
Offline Profile  
 
 Post subject: Re: Diy Dragons Lair scoreboard
PostPosted: Wed Dec 27, 2017 9:47 am 
Registered User
Registered  User

Joined: Thu Jun 15, 2017 7:31 am
Posts: 4
To italiandoh: I use thicker wires for the cathode pin on each led. But I also think this might be an issue so I'll try that.

To rablack97: Daphne doesn't use the serial port. It uses the parallel port. Check the wiki for info:
http://www.daphne-emu.com/mediawiki/ind ... Scoreboard
The wiki says up to Windows XP is supported but I've used it in Windows 10 64bit and it seems to work.


Top
Offline Profile  
 
 Post subject: Re: Diy Dragons Lair scoreboard
PostPosted: Fri Dec 29, 2017 5:33 pm 
Registered User
Registered  User

Joined: Thu Jun 15, 2017 7:31 am
Posts: 4
I replaced the kynar wires with thicker ones but I still get the same problem.
Testing it reminded me that this is probably not a power issue. When the game is booting up and the display shows the initial stuff everything is just fine. Then when the game and display allow to input coins the problem appears.


Top
Offline Profile  
 
 Post subject: Re: Diy Dragons Lair scoreboard
PostPosted: Sat Dec 30, 2017 2:10 pm 
DAPHNE Platinum Donator
DAPHNE Platinum Donator
User avatar

Joined: Fri Jun 01, 2001 1:00 am
Posts: 110
Location: Italy
Have you read this topic on the subject? -> https://www.daphne-emu.com:9443/phpBB2/viewtopic.php?f=5&t=2835&p=13107
Also, have you followed these instructions on how to build the cable? -> https://www.daphne-emu.com:9443/mediawiki/index.php/Scoreboard
If onboard, have you tried changing parallel port BIOS settings to see if it helps?

_________________
Matteo


Top
Offline Profile  
 
 Post subject: Re: Diy Dragons Lair scoreboard
PostPosted: Sat Jan 06, 2018 12:41 pm 
Registered User
Registered  User

Joined: Thu Jun 15, 2017 7:31 am
Posts: 4
Hi italiandoh. Yes I've read the post and I've built (and rebuilt) the cable to those specs. I was motivated to look into this again because of your bios settings suggestion.

I noticed that the "flickering" did not happen until after Windows booted. I tried going into safe mode and the "flickering" doesn't happen there either - but also the parallel port doesn't work.
Also if I disable the port in the device manager the flickering stops (but then I can't use it in Daphne) and starts again when I enable it.
It also doesn't happen as I mentioned when Dragons Lair boots and the initial stuff are displayed on the scoreboard.
So I'm pretty certain this is a Windows/drivers issue. This is probably the Windows device autodetection causing this but I've been unable to disable it.

EDIT
I've read that Windows XP introduced something called warm polling which is used to detect if something is connected to the parallel port. I tried using a registry edit which disables it but is didn't work
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Parport\Parameters]
"DisableWarmPoll"=dword:00000001
It would be useful if I could find out if something is polling the port (Windows, a driver, some software) and kill it.


Top
Offline Profile  
 
 Post subject: Re: Diy Dragons Lair scoreboard
PostPosted: Sat Jan 06, 2018 3:06 pm 
DAPHNE Platinum Donator
DAPHNE Platinum Donator
User avatar

Joined: Fri Jun 01, 2001 1:00 am
Posts: 110
Location: Italy
auberwn wrote:
Hi italiandoh. Yes I've read the post and I've built (and rebuilt) the cable to those specs. I was motivated to look into this again because of your bios settings suggestion.

I noticed that the "flickering" did not happen until after Windows booted. I tried going into safe mode and the "flickering" doesn't happen there either - but also the parallel port doesn't work.
Also if I disable the port in the device manager the flickering stops (but then I can't use it in Daphne) and starts again when I enable it.
It also doesn't happen as I mentioned when Dragons Lair boots and the initial stuff are displayed on the scoreboard.
So I'm pretty certain this is a Windows/drivers issue. This is probably the Windows device autodetection causing this but I've been unable to disable it.

EDIT
I've read that Windows XP introduced something called warm polling which is used to detect if something is connected to the parallel port. I tried using a registry edit which disables it but is didn't work
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Parport\Parameters]
"DisableWarmPoll"=dword:00000001
It would be useful if I could find out if something is polling the port (Windows, a driver, some software) and kill it.


Well, if you already tried with different computers then it is unlikely to be a problem of drivers because they probably won't use the same HW or drivers. So perhaps the problems is either in Windows, or in Daphne and how it handles the writings to the parallel port. But it's just a guess. I think only Matt can say if this could be a possibility. You can try with a very old version of Daphne, if you have it. Or try using daphne on linux.

_________________
Matteo


Top
Offline Profile  
 
 Post subject: Re: Diy Dragons Lair scoreboard
PostPosted: Sun Jan 07, 2018 1:18 am 
Registered User
Registered  User

Joined: Mon Jul 15, 2013 2:27 am
Posts: 4
I installed XP on a new PC didnt add any additional drivers and the SB worked just fine.

I've yet to find a PCI-E parallel card that works yet due to that port assignment issue.

Keep this in mind as well, you may have a faulty board, I've built a few of these boards and most of my issues were not software based but hardware, flickering could mean something isnt getting enough power or you could have a bad cap or resistor.

Also where is your 3rd capacitor?


Top
Offline Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 14 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Theme created StylerBB.net