How does Dosbox accelerate in the game? After pressing Ctrl+F 12, only the CPU value is increased, and the game speed remains unchanged. What happened?

Long press alt+f 12 to open fast forward, which can accelerate in the game.

Of course, the smaller the set CPU value, the greater the acceleration by pressing alt+f 12.

Because: set CPU speed (number of cycles) x acceleration multiple = actually occupied CPU speed, and the actually occupied CPU speed has an upper limit, which is limited by the CPU speed of the computer host.

For example, if the CPU is adjusted from 10000 cycle to 1000000 cycle, due to this limitation, the acceleration factor will generally become less than 0.0 1, that is, the game running in DOSBox is more than 100 times slower.