PICTURE DISPLAY DEVICE FOR GAME MACHINE

摘要

PROBLEM TO BE SOLVED: To realize diversified picture display while preventing the increase of a CG memory. SOLUTION: Sprite pictures of display characters are stored in a CG-ROM 103 and a CD-ROM driver 105 as an external memory. Picture plotting part 108 reads out and displays pictures from the CG-ROM 103 in the case of simple pictures and reads out and displays pictures from a CD-ROM in the case of complicated pictures. A polygon plotting part 113 generates a polygon from one polygon data. A CPU 101 for plotting control which has 32-bit bus width generates pictures viewed from an objective point based on the polygon. JPEG compressed pictures stored in the CD-ROM are expanded by a data expansion part 110. Pictures generated by a picture plotting part 108 are alternately written in a pair of frame buffers 119a and 119b and are alternately read out to a liquid crystal display device.