For my Mini Apple IIe project, I'd like to include HDMI output. This project is a one-off. So, I want HDMI to work, but I am not worried about passing compliance or licensing tests.
Ideally, I'd like to find an off-the-shelf chip that can take analog RGB signals, a sound input, and convert them to HDMI.
Why not DVI? The sound. From what I understand, DVI does not support a sound channel.
Looking around at the obvious semiconductor companies, it seems like analog-RGB to HDMI is something that exists. However, all require contact for more information. I suspect this step is to make sure you are licensed for HDMI IP. Fair step, but I am not selling anything.
On the grey market, I found the IT6613 (mirrored datasheet). It is used in the Open Source Scan Converter project. An interesting chip, it seems to do what I want, but it is huge and has a bunch of stuff I don't need.
I suppose one option is to do something with an FPGA. But I was really hoping to find something off-the-shelf.
I briefly looked at the Pi Pico PIO DVI implementation. But, again, the sound seems to be a stumbling point there.
Any ideas?
