Contributed by bzhou830, curated by Ai-Thinker
1. Design Analysis
The M61-32S Kit uses the BL618 chip with a main frequency up to 320M. Driving VGA is definitely no problem. The DAC interface can also drive headphones and audio equipment. This makes it possible to emulate various systems.
Therefore, simply use the M61-32S Kit to design a small board for easily driving VGA devices. Considering that the software implementation cannot be done in one step, this will be a series of articles moving forward step by step.
2. Schematic
The schematic mainly considers three parts:
Operation Steps
TF card interface, for reading system images;
Audio output interface;
VGA display output interface.
3. PCB
Since there are few components, the layout is also simple. The resistors and capacitors all use the 0805 package for easy soldering. Three screw holes are reserved for fixing the board with a 3D-printed enclosure later. 
4. 3D Render
5. Final Notes
Since the board above has not been verified yet, and various oversights are likely, experts are welcome to give suggestions so we can make this board better.
1. Design Analysis
The M61-32S Kit uses the BL618 chip with a main frequency up to 320M. Driving VGA is definitely no problem. The DAC interface can also drive headphones and audio equipment. This makes it possible to emulate various systems.
Therefore, simply use the M61-32S Kit to design a small board for easily driving VGA devices. Considering that the software implementation cannot be done in one step, this will be a series of articles moving forward step by step.
2. Schematic
The schematic mainly considers three parts:
Operation Steps (continued)
TF card interface, for reading system images;
Audio output interface;
VGA display output interface.
3. PCB
Since there are few components, the layout is also simple. The resistors and capacitors all use the 0805 package for easy soldering. Three screw holes are reserved for fixing the board with a 3D-printed enclosure later.
4. 3D Render
5. Final Notes
Since the board above has not been verified yet, and various oversights are likely, experts are welcome to give suggestions so we can make this board better.
Have questions?
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