HDMI output for A1200?

[freqmax]

I think there's a chance to make this work with some 5V->3.3V level converters and an smart HDMI transmitter.
The section "6.3  Video Format Timing Specifications" gives hope.

The worry points are:
 * Resolution and timing match, esp for 320x256 modes etc..
 * Need for a possible external line buffer.
 * Digital audio interface.. don't think Paula has one?

Anyone have a A1200 full schematic?

[freqmax]

Did this project went anywhere?

As a bonus there's FPGA:s that can do HDMI natively if one as able to solder them

Some useful links:
Amiga 1200 Motherboard PCB picture (rev 1d4)
Auto-detecting SD/HD/PC Video sync separator
ADV101 80 MHz, Triple 8-Bit Video DAC
ADV101 80 MHz 3x 8-bit D/A without "obsolete" written all over
Amiga 3000 Lisa + Alice PCB picture (PLCC socket)
Amiga 1200 block diagram
Amiga 1200 schematics - defunct!
Amiga 1200 schematics (2.2 MB)

[freqmax]

If the Amiga dictate the clockrate it will be cycle exact, because the Amiga defines it.
And most TV sets use HDMI, better get started with it. Or the video output options might be as limited as trying to read 5,25" floppys.

[freqmax]

iirc, the HDMI thing wouldn't work because Amiga does D/A conversion inside a chip. so you'd need to do a A/D conversion for HDMI, and that sux,

And if you had actually read the thread it would been obvious that the idea is to piggyback the D/A chip ADV101KP30.

[freqmax]

It's to do with that seperate signals för Red-Green-Blue and sync is way better than just push it all into the same signal wire. But SCART provides both RGB, S-video, Composite and users don't really know which ones are used..

Oh, and a signal path of D/A -> A/D is not better than a fully digital path.

[freqmax]

I assume it's Red-White-Yellow <=> Right-Left (sound) -Yellow (composite video) so it's kind of the worst signal quality used with SCART. But's it's still SCART. Because that standard is a collection of possible signal standards.

So yes, it is SCART. But not optimaly used.