Software Support > GroovyMAME

CRT Emudriver - Sync Issue

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DJO_Maverick:
For anyone who encounters the same, ended up resolving issues by giving up on software generated C-Sync and just grabbing a VGA-Scart cable from Retrocables.es that has the sync combiner integrated. 

No clue why my system just never could cooperate with the emudriver C-Sync, but all set now.

Zebidee:
Now I'm not travelling, I had a fresh look at this thread.

I think the issue with your first cable, the "Ultimate" MiSTer VGA to RGB SCART Cable, is that it is based on gambaman's designs for "The ultimate VGA to SCART adapter", which are detailed here:
http://forum.arcadecontrols.com/index.php?topic=160869.0

This cable requires 5v from VGA pin 9 to manage the composite sync, which will not be available if you are using a DVI-VGA dongle. This not only means that the onboard chip to process the sync won't work, but also it will block any sync signals from getting through passively.

I assume that your new cable comes with a molex (4 pin) cable/header to get power from the PC? Like this one?
https://retrocables-es.translate.goog/tienda/index.php?id_product=442&controller=product&id_lang=4&_x_tr_sch=http&_x_tr_sl=es&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=sc

DJO_Maverick:

--- Quote from: Zebidee on April 07, 2023, 01:39:43 am ---I assume that your new cable comes with a molex (4 pin) cable/header to get power from the PC? Like this one?

--- End quote ---

No, it's this one.  http://retrocables.es/tienda/index.php?id_product=55&controller=product&id_lang=1
However, I'm not using the USB power, it's running fine in pure passive.

psakhis:
This cable is "normal", so don't have any micro to generate csync. Just it's combining h+v signals.

Zebidee:
Fortunately the SCART input 'Tink device won't care about RGB switching, so won't need power. you'd only need power for SCART TV RGB and/or AV switching.

I wonder if the SCART cable just has H+V syncs twisted together and through a resistor? Simple yet works in many/most cases.

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