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Understanding & Fixing RGB Noise

A project log for Rämixx500 - Amiga 500+ Mainboard

Open Hardware Remake of this Commodore Masterpiece

Edoardo AUTERIEdoardo AUTERI 07/28/2021 at 02:100 Comments

I have been working to maximize Ramixx500 V2’s analogue RGB video output and interestingly I have found few improvement points that are essential:

In the Amiga environment the jail bars are probably generated by peak noise induced by a floating _CCK (clock out for the genlock) and empathised by bad quality shielding/grounding at cable ends, regardless the resolution or de-/interlaced PAL/NTSC video modes.

Tested with:

(schematic from amigawiki)

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