Hi everyone,
I'm currently testing a red alert (1981) arcade pcb. It mostly seems to be working except for a sync issue I'm having.
The pcb has both a vertical and horizontal sync and for testing purposes I am using a gbs-8200 cga to vga converter, I do not have anything else to use at the moment.
Currently I have the the vertical and horizontal syncs wired together on the gbs-8200 since the cga input on the gbs-8200 only has composite sync. I posted a video
on youtube showing what I get, link below:
As you can see there is a good amount of horizontal scrolling and jitter, occasionally there is no signal to the gbs-8200 as well as seen in the video. I am guessing this is due to me
putting the horizontal and vertical sync wires together for the gbs-8200. Would this be correct? If so, is there a simple way I can get around this while still using an lcd monitor?
Currently I do not have an arcade monitor, I was thinking about purchasing the 19" Vision pro LCD at some point but I wanted to wait to make sure there was not some
significant issue with the pcb. My other question is could this be a pcb issue or partly due to an issue with the pcb?
Sorry about all the questions, I'm new to dealing with arcade monitors and this is also only the 2nd arcade pcb I've dealt with.
If anyone has any other suggestions for testing out the pcb that would be great as well.
Thanks!