INT 10,A - Write Character Only at Current Cursor Position

	AH = 0A
	AL = ASCII character to write
	BH = display page  (or mode 13h, background pixel value)
	BL = foreground color (graphics mode only)
	CX = count of characters to write (CX >= 1)


	return nothing


	- similar to INT 10,9 except color ignored in text modes