Start an animated screensaver.
After the screensaver command, the co-processor engine continuously updates REG_MACRO_0 with VERTEX2F with varying (x,y) coordinates. With an appropriate display list, this causes a bitmap to move around the screen without any MCU work.
Command CMD_STOP stops the update process.
REG_MACRO_0 is updated with respect to frequency of frames displayed (depending on the display registers configuration).
Typically for 480x272 display the frame rate is around 60 frame per second.
' see it working in FT800 Demo4.bas (Sub Screensaver)