CGA 显示接口
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CGA 是 Color Graphics Adapter 的缩写,信号类型为 TTL,最多能显示 16 色,显示卡端的接口为 9 针母插座:

显示器连线端的接口为 9 针公插头:

| 引脚定义 |
| Pin | Name | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | GND | Ground |
| 3 | R | Red |
| 4 | G | Green |
| 5 | B | Blue |
| 6 | I | Intensity |
| 7 | RES | Reserved |
| 8 | HSYNC | Horizontal Sync |
| 9 | VSYNC | Vertical Sync |