HDMI For The Amiga and Atari ST
I have just added two new adaptors for the RGBtoHDMI that support the Commodore Amiga and Atari ST computers. These two adaptors work similarly in that they both pickup digital signals from inside the computer that can be passed to the RGBtoHDMI board that can be located on the outside of the system. This way you don’t have to dedicate a (currently) super expensive Raspberry Pi to a single computer. Instead, you can move the RGBtoHDMI with it’s attached RPi from computer to computer as you wish.
The Amiga adaptor picks up signals from the Amiga Denise chip (8362 or 8373) and allows you to easily connect to the RGBtoHDMI fitted with a 12bit digital extender board. This should work in the A500, A500+, A600, A1000, A2000, early A3000, and CDTV. In early models of the A500, A1000, A2000, and CDTV, you will need to run two extra bodge wires for the CSYNC and CDAC signals. Check the schematics for those systems to see if CSYNC and CDAC are present on those sockets. More information here: https://github.com/c0pperdragon/Amiga-Digital-Video/issues/28
This Atari ST adaptor picks up signals from the 40 pin video shifter chip inside the ST. Later models used an 80 pin shifter chip and this will not work for those. You will need to run three extra bodge wires for the horizontal sync, vertical sync, and blanking signals.
Recommended setup: RGBtoHDMI + 12bit Extender + 16 Pin Extension Cable + Amiga Adaptor or Atari ST Adaptor