.... my problem now ist how to connect ist to vga. anybody with a very simple solution for an absolute beginner?
first, welcome here.
second, there is a simle answer, you can´t
Galaga´88 is a 15K lowres game, it doesn´t output VGA signals.
The only solution to use it on a VGA monitor is to hook up additional devices, like a cga2vga scaler and a sync splitter. And of course a SLG3000 for the scanlines. You can check out Bencao74´s website for more info about that.
But please don´t use thta equioment, you don´t really want to use a VGA monitor. The game is intended to use with a 15K monitor, so why not hook up one of those?
But to be honest, I am a bit amazed that you thought that you could hook up a Galaga ´88 PCB directly to a VGA monitor! Obviously you didn´t do a lot of research on forehand.
By the way, the price of a Galaga ´88 board has increased extremely over the last few years, I sold mine little than two year ago for € 120!!! And still made a little profit!!!
I know now that I should have kept it.