a display apparatus for displaying any data on split blocks on a display screen of a crt . the apparatus comprises a circuit for producing a horizontal address and a vertical address of a display position on the display screen ; a block address generator comparing the horizontal and vertical addresses of the display position with predetermined horizontal split addresses and vertical split addresses for generating a block address which shows one of the split blocks on the display screen according to the comparison result ; a code converter for converting the block address to a predetermined code ; a memory start address generator for generating a memory start address according to the code outputted from the code converter ; a memory address generator for generating a memory address from the memory start address and the horizontal and vertical addresses of the display position ; a display memory storing display data and output the display data according to the memory address ; and a display monitor for displaying the display data outputted from the display memory on the crt .