The MB90050 is an on-screen display controller for displaying text and graphics on the TV screen. The MB90050 controls a display area of 35 characters by 16 lines, and provides each character composed of 24 x 32 dots at most. The display functions include a wealth of characters with qualifying functions such as character background shading (shadow casting) , sprite character functions and graphic character functions, contributing to the use of control GUI displays. The MB90050 incorporates display memory (VRAM) , character font ROM, and sync signal generation circuit and video signal generation circuit supporting the NTSC and PAL systems, allowing text and graphics to be displayed in conjunction with a small number of external components.