OT: Composite/Component [was Re: [mythtv-users] Re: Image quality,
what effects it?]
Cory Papenfuss
papenfuss at juneau.me.vt.edu
Sat Aug 14 11:04:03 EDT 2004
> I emailed the pcHDTV guys and they said that the chip on it supports
> QAM. I don't even know the IP licensing for the card and its use,
I looked through the kernel patch for the pcHDTV card, and as near as I
can tell, the initialization and operation of the OREN chip has been
obfuscated in i2c data packets:
char tu250266c[] = {
0x7e,
0x00, 0xf8, 0x38, 0x6c, 0x00, 0x80, 0x39, 0x00, 0xf1, 0xff, 0x7f, 0x80, 0x00,
0x20, 0x21, 0x7f,
0x00, 0x20, 0x26, 0x7f, 0x72, 0x00, 0x00, 0x80, 0xf1, 0x70, 0x02, 0x69, 0x00,
0x20, 0x96, 0x78,
0x81, 0x90, 0x01, 0x69, 0x00, 0x20, 0x46, 0x7a, 0x11, 0x24, 0x00, 0x61, 0x00,
0xd0, 0x01, 0x6c,
.....
char tu250266d1[] = {
0x7d,
0x5a, 0x5a, 0x5a, 0x5a, 0xe0, 0xff, 0x00, 0x00, 0x00, 0x00, 0x20, 0x00, 0xc0,
0xff, 0x20, 0x00,
......
char tu250266d2[] = {
0x00, 0x00, 0x00, 0x00, 0xe0, 0xff, 0x40, 0x00, 0xc0, 0xff, 0xc0, 0xff, 0x20,
0x00, 0xe0, 0xff,
0xe0, 0xff, 0xe0, 0xff, 0x40, 0x00, 0xe0, 0xff, 0x20, 0x00, 0x40, 0x00, 0x00,
0x00, 0x00, 0x00,
....
and such. No luck finding the magic code like:
/*DEMOD_MODE="8VSB"*/
DEMOD_MODE="QAM"
Doh!
-Cory
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