The first color and graphics card, designed and manufactured by IBM, offered for the PC line. The card can operate in the following modes: 40-by-25 B／W alphanumeric mode, 40-by-25 color alphanumeric mode, 80-by-25 B／W alphanumeric mode, 80-by-25 color alphanumeric mode, and 3 graphic modes. The physical address of the video buffer in the CGA is B8000H.; IBM公司為PC機設計和制造的第一種彩色圖形卡。該卡可工作于以下幾種顯示方式:40×25 黑／白字母數(shù)字方式、40×25彩色字母數(shù)字方式、80×25黑／白字母數(shù)字方式、80×25彩色字母數(shù)字方式和3種圖形方式。CGA中視頻緩沖區(qū)的物理地址為B8000H。