You can determine the current video mode by calling the video display get mode function, vid_getmode():
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The return value is interpreted as follows:
| BW40 | 40x25 black and white text mode |
| BW80 | 80x25 black and white text mode |
| CO40 | 40x25 color text mode |
| CO80 | 80x25 color text mode |
| MONO | Monochrome board |
| 4 | Graphics Mode (320 x 200 color) |
| 5 | Graphics Mode (320 x 200 black and white) |
| 6 | Graphics Mode (640 x 200 black and white) |
| >=8 | Graphics Mode |
