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mlorenzati / pico-rgb2hdmi

A microprocessed RGB to HDMI Converter with USB capture
MIT License
70 stars 11 forks source link

Amiga DB23 To Beta3 Pin Header Mapping #36

Open mrgo0se opened 10 months ago

mrgo0se commented 10 months ago

Hi,

Is there an existing schematic/diagram anywhere showing the exact pin mapping between Amiga DB23 and the Beta3 PCB pin header signals, including appropriate grounds?

I am fairly confident that I have this wired correctly and get display/diagnostic menu on screen but only alternating black screen and garbled video signal output.

If you could post a mapping in the repo for wiring using CSYNC and alternatively HSYNC/VSYNC via the DB23 that would be great.

I'm also using the WM8214 AFE rather than the WM8213 if that makes any difference?

Cheers.

mlorenzati commented 10 months ago

The picoRGB2HDMI is generalistic to use any retrocomputer with RGB or RGBi output (prior converting signal) that's why I do not add a circuit to the DB23 since its just pin to pin connection. The board can use either CSYNC or HSYNC+VSYNC. For the first one, leave board HSYNC Grounded and connect Amiga CSYNC to the board HSYNC. Check here the pinout of Amiga https://inanis.net/amiga-500-to-amiga-1084-rgb-cable/ You can use one or the three ground amiga pin 16,17,18

Regarding WM8214 is compatible with WM8213 but faster, I saw that it might have a slightless timing difference that could shift colors. For sake of simplicity I'm about to push in this days a feature to manage gain/offset per RGB color.