Brad P. Taylor lardratboy
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| // License: public domain. | |
| #include <dos.h> | |
| #include <conio.h> | |
| void set_video_mode(int mode) | |
| { | |
| union REGS regs; | |
| regs.x.ax = mode; | |
| int86(0x10, ®s, ®s); |
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| max(-x,-y) = -min(x,y) | |
| min(-x,-y) = -max(x,y) | |
| abs(x) = abs(-x) | |
| abs(x) = max(x,-x) = -min(x,-x) | |
| abs(x*a) = if (a >= 0) abs(x)*a | |
| (a < 0) -abs(x)*a | |
| // basically any commutative operation | |
| min(x,y) + max(x,y) = x + y |