This is my MiSTer CD32.
No (additional) alterations were made to the CD32 and it could be restored to a barley working NTSC CD32 at any time.
When I purchased got the CD32 I modded the case to add a 50/60hz switch, but no other modifications beyond that. I do regret doing that because now I'm not even using the switch
The CD32 was NOS and never really worked that well which is why it spent most of the time in its original box stashed away in my closet.
Even if it did work 100% reliable, hooking a NTSC CD32 to most NTSC TV is problematic because most software only runs correctly in PAL mode. When switched to 50hz mode video usually turns monochrome.
I implemented the audio circuit from the IO board schematic breadboard and through-hole components. Also on that breadboard is some 817 optocouplers which drive the CD32's activity and power LEDs.
In the CD bay is the secondary SD card. I'm not sure if I'm going to keep this as it no longer seems necessary.
The back expansion cover was 3D printed by my friend. He also printed an insert to make to make the toggle switch I used for power look like a rocker switch. We probably will try to do a modified version of the back expansion cover in the future. I don't know anything about about 3D printing. I'm more about files, drills, grinders, saws, etc.
I'm I plan to tweak the layout inside for more direct fan and clean up some of the wiring.
I also want to add some sort of little audio amplifier to drive the CD32's headphone jack. I tried driving it directly from the analog audio circuit but the output was such (using AKG k7xx headphones) that the volume maxed out was just adequate.
Very much thanks goes to Sorgelig!
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