and dont use the mixed sync
simbo wrote:in the ste is another mod you can do simply cut R439
this will deliver mixed sync compsite polarity to the video socket pin 2 composite out
It looks like we are both on the same quest.
It looks like I have the same board, but it's from a different vendor. My guess is that there is a OEM manufacturer who builds them and then licenses it out. My board is red instead of green, but otherwise, looks exactly the same. The specs and manual look exactly the same too.
Unfortunately, my results are not good. This is what I got.
The funny thing is that the board detects a combined sync coming out of the ST. It displays a pattern of solid colors and other garbage. Once in a while, you can see the desktop, but it too is skewed and full of garbage as seen in the picture directly above.
I next switch the input to separate sync output (which is what the ST normally outputs), and here, the picture is either all red or green and keeps rolling top to bottom. In addition, the screen is not stable as you can see in the middle two pictures above.
I've checked my soldering and pin connections to make sure I didn't make a mistake, but it looks good to me. I actually made two cables - one connected to the white internal header, and the other to the D-Sub 15 pin input port. Both yielded the same result.
I don't know what else to do.
simbo wrote:if you notice it wont support 15.75khz so its no use for atari st machines
or mega ste or mega st without graphics addons
..............................ST High.......ST Low/Medium
Vertical refresh rate.....72 Hz........50 or 60 Hz
Horizontal refresh rate..31.5 Khz.....15.75 Khz
however i simply doubled the hsync pulses and got a resonable picture
and a good frame lock
it pisses me off that each time i turn it on the menus are again in chinese etc..
seems to have no nvram for settings
Anemos wrote:As with the Amiga this converter is wayward and Atari, and generally to video signals of home-micros.
I managed to finally show a fairly good picture but having a little flickering (in games do not seem so ..)
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