Build Your Own Arcade Controls Forum

Main => Monitor/Video Forum => Topic started by: del on March 26, 2003, 05:09:50 am

Title: Dreamcast + LM1881 + Arcade Monitor= Not working!
Post by: del on March 26, 2003, 05:09:50 am: Hi All,

I'm trying to hook my dreamcast upto my Jamma cabinet via the jamma connector. I have made a circuit using the lm1881 chip as described in many articles. A get a picture but it is split in the middle of the screen sort of wrapping around the screen. monitor adjustments allow for h-position but the image barely moves, do i still have a sync propblem?. ???
Title: Re:Dreamcast + LM1881 + Arcade Monitor= Not working!
Post by: del on March 26, 2003, 07:32:34 am: Ok I have solved the problem, I removed the lm1881 circuit i made and just hooked up dreamcast R,G,B,Sync & ground to the jamma buscuit, hey presto stable image on monitor!! :) maybe my monitor doesn't need sync to be stripped from the signal, seems to work anyway. Now it would be nice to have some sort of video switcher to be able to switch between Pc/Dc/Ps2 which all will be connected via jamma connectors, save me from have to plug/unplug relevant jamma connector each time. any ideas??
Title: Re:Dreamcast + LM1881 + Arcade Monitor= Not working!
Post by: Generic Eric on March 26, 2003, 08:30:39 am: Quote from: del on March 26, 2003, 07:32:34 am
Now it would be nice to have some sort of video switcher to be able to switch between Pc/Dc/Ps2 which all will be connected via jamma connectors, save me from have to plug/unplug relevant jamma connector each time. any ideas??

How is the PS2 hooked up now?
Title: Re:Dreamcast + LM1881 + Arcade Monitor= Not working!
Post by: del on March 26, 2003, 11:03:25 am: Its not hooked up yet.
Title: Re:Dreamcast + LM1881 + Arcade Monitor= Not working!
Post by: SNAAAKE on March 26, 2003, 01:57:58 pm: Quote from: del on March 26, 2003, 07:32:34 am
Now it would be nice to have some sort of video switcher to be able to switch between Pc/Dc/Ps2 which all will be connected via jamma connectors, save me from have to plug/unplug relevant jamma connector each time. any ideas??

Do you have to have the jamma cabinet intact?

Like you cant mess around with the jamma harness?

If you can get rid of jamma connection then you can use a switch box..you know buy a switch box,some male/female cable for the swich box and you have it.

IF you must leave your jamma harness intact then you buy jamma fingerboard and switch em manually every time you wanna switch systems.

you solder every connection right onto jamma fingerboard.Assuming you know all the pinouts and stuff.

It seem like a lot of hassle though. :-\

I would personally screw the jamma harness and get a switch box. ;)
Title: Re:Dreamcast + LM1881 + Arcade Monitor= Not working!
Post by: rampy on March 26, 2003, 02:06:30 pm: Quote from: del on March 26, 2003, 07:32:34 am
Now it would be nice to have some sort of video switcher to be able to switch between Pc/Dc/Ps2 which all will be connected via jamma connectors, save me from have to plug/unplug relevant jamma connector each time. any ideas??

http://www.multigame.com/jamma.html (http://www.multigame.com/jamma.html) *shrug* or make your own manual switcher thingie... (search google for multi jamma for examples....

or disreagard the jamma connector and make some other type of switching system (kinda like what snaaaaaaaaaaake is proposing)

rampy
Title: Re:Dreamcast + LM1881 + Arcade Monitor= Not working!
Post by: Cave on March 26, 2003, 02:35:21 pm: If your using scart plugs on your consoles, you could wire up a fingerboard to a scart switcher box, most boxes have 3 in 1 out and various phono inputs/outputs and there really cheap.
Title: Re: Dreamcast + LM1881 + Arcade Monitor= Not working!
Post by: hijakt on October 26, 2011, 10:51:40 am: where can I find a good clear guide for Scart to arcade monitor? I know about the VGA box, I'd still like to understand the Scart version because I could do the same woth other systems once I understood the theory.Thanks.