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This pages describes a vga to scart adapter and a working setup with xFree/Xorg and old 80's style TV. The ususal disclaimer and policy applys.
VGA SCART
1 -O------------------------------------------O- 15 R
2 -O------------------------------------------O- 11 G
3 -O------------------------------------------O- 7 B
6 -O------------------------------------------O- 13 R Gnd
7 -O------------------------------------------O- 9 G Gnd
8 -O------------------------------------------O- 5 B Gnd
5 -O-+
|
11 -O-+
Connector --------------------------------------O- 21 Connector
shell shell
14 -O------------------------+
-VS |
|
| /
+-----+ |/
13 -O--+ 3k3 +-----*-----| BC 548 B
-HS +-----+ | |\
| | \|
| -| +-----+
| *-----+ 68 +-----O- 20
| | +-----+ -CS
+++ +++
| | | |
| | | |
+++ +++
| |
10 -O--------------*---------*-----------------O- 17
Gnd 1k2 820 Gnd
*optional*: combine grounds
5,6,7,8,Shell ------------------------------------ 5,9,13,17,21 (grounds)
*optional*: hardcode TV mode - some //modern// TVs allow those modes
to be switched via OSD, or autodetection. I needed to hardwire those for my
old 80's arcade - TV.
+12V <------------------------*-----------------O- 8
|
| +-----+
*-----+ 560 +-----O- 16
+-----+
GND <------------------------------------------O- 17,18
You can use any general purpose low frequent low power Si NPN transistor instead of the BC 548 B The resistors are all standard 250 mW carbon film resistors;
68 = 68 Ohm 560 = 560 Ohm 820 = 820 Ohm 1k2 = 1200 Ohm 3k3 = 3300 Ohm
Notes:
X11 XF86Config-4 or xorg.conf
Section "Device" Identifier "GFX" # Driver "mga" Driver "nv" BusID "PCI:1:5:0" EndSection
Section "Monitor" Identifier "TV" HorizSync 10-20 VertRefresh 40-60 ModeLine "TV" 18.00 936 968 1056 1152 576 580 583 625 interlace -hsync -vsync EndSection
minimum pixel clock of 18MHz.
Clock range: 17.75 to 250.00 MHz