//
// so only first 16 bits count, and 0x0100 is a mask for ok/stable signal?
//
+ // Bottom 16 bits of this register seem to be firmware version number (possibly not all all of them).
+ //
// 28 and 32 seems to be analog audio input levels (one byte for each of the eight channels).
// however, if setting 32 with HDMI embedded audio, it is immediately overwritten back (to 0xe137002a).
//
// 36 can be set to 0 with no apparent effect (all of this tested on both video and audio),
// but the driver sets it to 0x8036802a at some point.
//
+ // 0 is written to during firmware upgrade. Probably best to stay out of it unless you know
+ // what you're doing.
+ //
+ //
// register 16:
// first byte is 0x39 for a stable 576p60 signal, 0x2d for a stable 720p60 signal, 0x20 for no signal
//