Configure CTC channel 0 to produce an interrupt at the end of every VDP frame. In order to actually generate interrupts it is also necessary to set the IE (Interrupt Enable) bit in VDP register 1.
After running this routine, pause(1) can be used to wait for the end of a VDP frame before updating the display.
Note that after calling this routine, the clock will be updated and sprites moved every 20ms instead of every 8ms.
Include file: mtxint.h