#A1200 to VGQ connection
4 messages in this thread
Hi
I would like to connect the video output of an Amiga A1200 to a VGA monitor.
My VGA card gives the following pin information:
1 Red Video
2 Green Video
3 Blue Video
4 Mon ID b2 (not used)
5 Ground
6 Red return (ground)
7 Green return (ground)
8 Blue return (ground)
9 [] Key (no pin)
10 Sync return (ground)
11 Mon ID b0 (not used)
12 [] Mon ID b1 (not used)
13 Horiz. Sync
14 Vert. Sync
15 [] (not used)
The Amiga pins are as usual:
1 /XCLK (In)
2 /XCLKEN (In)
3 Analog Red (75 ohm)
4 Analog Green " "
5 Analog Blue " "
6 DI (47 ohm)
7 DB (47 ohm)
8 DG (47 ohm)
9 DR (47 ohm)
10 /CSYNC (47 ohm)
11 /HSYNC " "
12 /VSYNC " "
13 GNDRTN
14 /PIXELSW (Gelock overlay)
15 /C1 (Clock out)
16 Video Earth
17 Video Earth
18 Video Earth
19 Video Earth
20 Video Earth
21 -12V 10mA
22 +12V 100mA
23 +5V 100mA
I imagine that the Amiga analog R-G-B signals go straight
to the video R-G-B pins, and that the video earth goes to
the monitor ground (This is how I connected a Microvitec
some time ago – I *presume* VGA is different).
I am also not quite certain what to connect for the sync.
Is there anything else I should be aware of? For instance,
do I have to connect the R-G-B returns on the VGA side?
Any help appreciated,
Alex
Alex: You will need a CBM 23-pin Monitor adapter, part number 390682-01.
You can't just hook up corresponding pins of the 23-pin RGB port to a
15-pin VGA cable. I believe their is a text file somewhere on InterNet in
the Aminet archives that explains how to make your own monitor adapter,
and if you need it, I can upload it for you.
// John (Speeding on the Information Superhighway)
\X/ Mercury@ins.infonet.net
John – Thanks
Any information on the adapter will be appreciated – (It doesn't appear on my
Aminet CD-ROM)
Alex Gian
Bristol UK
If you have the Aminet-II CD, it is in the directory AMINET/HARD/HACK as
MISCHACKS.LHA. There is a bunch of hardware hacks in that archive
including one on building a VGA adapter. If you still can't find it, let
me know and I'll upload it for you.
// John (Speeding on the Information Superhighway)
\X/ Mercury@ins.infonet.net