vga_fn.h

Here an embedded System-on-Chip is build, in an Xilinx Spartan-3 FPGA with Microblaze as the process

// VGA Display Function
vga_geometry(int color, int shape, int move)
{
	int geo_reg;
	
	// The move status is mentioned in the LSB(0th), then 2 bit shape is taken by the the first
	// and secound LSB's and the color is defined in the third fourth and fifth LSBs of the 32
	// bit software register.
	geo_reg = (color * 8) + (shape * 2) + move;
	
	// software register write function call
	VGA_GEOMETRIC_IPCORE_mWriteSlaveReg0(XPAR_VGA_GEOMETRIC_IPCORE_0_BASEADDR, 0, geo_reg);
}