Space invaders 3 stack test loom

[Shinydaz]

I'm trying to build a test loom for a taito 3 stack black and white space invaders. Can I send the b + w signal to all 3 rgbs on edge connector and run it on a rgb monitor? I know the por needs to be connected to ground, anyone know what the reset line needs to be connected to?
Thankyou.

 

[Lurch666]

The B/w signal is composite so it contains a single line of data for the graphics plus the sync so it's won't sync on a RGB.
You need to either use a monitor with composite input or find out on the schematics where the comp and screen data is combined and take connections from before that so the sync goes to the RBG sync and the screen data goes to the R,G,B inputs. This means you have to solder to the PCB so it's not exactly a true adapter.
That will give you white graphics so I prefer to just connect to the green input.

If you can't figure out yourself where to take those signals from I can point it out on the schematics.

 

[Shinydaz]

Awesome thankyou

 

[mathj]

here is one i made earlier

i used a old rca cable and cut one end off and soldered it to pin 18 and ground on the bottom pcb connector
i then connect the cable to the yellow rca socket on a old lcd tv i got and it works perfectly

i got 2 looms one for B&W and the other for my colour pcb's

hope this helps

math

 

[Shinydaz]

Thanks, very helpful.

 

[Shinydaz]

Just coming back to this, this is the best image I can get on my crt. The inner wire is on pin 18 and outer wire is going to the video ground. I can see it's running at least, and the sound is good.

 

[philmurr]

You should be getting a much better picture than that.

Are you feeding that to the yellow AV input on your TV?