Hello there!
Today I've been busy building an VGA-SCART cable for my OCM (the Altera DE1 with CARO & HRA! core).
I've followed the instructions here:
but my LCD and CRT TV's just display some white screen with black lines. I've OF COURSE configured the OCM to output at 15HZ mode. Shouldn't that scheme work?
Thanks!!
No one? If that cable works i'm also interested on making it for my Altera 
@RetroTechie: I tried 2 different new LCD tvs: Samsung and Toshiba.
Same result on both: white image where white letters of MSX-DOS can be read if I get VERY next to the screen. Maybe this could be a hint on the problem but I don't know much about analog image cables 
Of course this Altera DE1 MSX produces a good image on VGA
@Mafcase: I tried those, too. Look at the post at my initial post.
I need someone who has done a WORKING, tested cable for Altera DE1 MSX, please...
The main difference Connectors VGA in OCM and DE0, DE1 is on the pin 9 VGA
is connected to the OCM +5 V. This signal is fed to the 16 contact SCART
(BLANK), which switches the TV to RGB-mode. In DE1 and DE0 pin 9 VGA
is not used, so even if we connect it with the 16th pin SRART,
the TV remains in the TV-mode.
There are two solutions to this problem:
1) Connect the 16th SCART contact with the 20th (CSYNC).
In most cases it helps, but sometimes due to the fact that the input
BLANK is low input impedance (75 ohms), the level CSYNC falls so low
that it leads to unstable operation of the monitor.
2) Connect the pin 9 VGA on the boards DE0 and DE1 to +5V
(can be via a resistor of 75-100 ohms).
The cable connection to provide contact 9 VGA with a contact 16 SCART.
I did so.
----------------
VGA ------ SCART
----------------
1 ---- RED ----- 15
2 ---- GREEN ---- 11
3 ---- BLUE ----- 7
13 --- CSYNC ------ 20 (+16 for 1 variant)
14 --- SOUND ------ 6 (0.1 uF -> GND)
6,7,8,10 --- GND ------ 17,4,7,8,10
9 ---- BLANK ----- 16
