1.3 KiB

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Amiga Video Slot Adapter

This adapter builds on the ideas from the Amiga Denise adapter V2, adapted for use in big box Amiga video slots.

The main differences are:

The 7MHZ signal is derived via C1 XNOR C3 since 7MHZ is not available directly from the video slot
Two button connectors allow for both a rear slot cover bracket button and another to be used, mounted wherever desired

The card edge connector used is from Amiga-KiCad-Library (https://github.com/JustinBaldock/Amiga-KiCad-Library). Approximately 1mm of space is left between the fingers and the PCB edge to allow for beveling.

Assembly

Interactive BOM

Installation notes

Set the Denise jumper according to which Denise is in your Amiga (Super Denise for 8373, Denise for 8362)
Orient the PCB such that the end with bracket mounting holes faces the rear of the machine

Version History

V1.1:
- Routing changes that eliminate "sparkling" on certain image patterns
- Excessive overclocking and the extra 47pf capacitor should no longer be necessary
- Make use of unused gates on the original 74LVC86 instead of adding another
V1.01 Added spot for 47pf capacitor (C6) to ensure no sparkling on image, and grounded unused inputs on U5 per data sheet recommendation.
V1.00 Initial version.