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The CGA card was succeeded in the consumer space by IBM's Enhanced Graphics Adapter (EGA) card, which supports most of CGA's modes and adds an additional resolution (640 × 350) as well as a software-selectable palette of 16 colors out of 64 in both text and graphics modes.
The Enhanced Graphics Adapter (EGA) supports all CGA modes and add three more: two 320×200 and 640×200 graphic modes, both with the full CGA 16-color palette (intended to be used with the same "digital RGB" CGA color monitor of 200 scan lines) and an extra 640×350 graphic mode with 16 colors chosen from a 6-bit RGB (64 colors) palette for ...
160 × 200 with 16 colors (equivalent to the graphical quality of many contemporary 8-bit home computers and games consoles, using the same 16 KB memory size and machine bandwidth as the original CGA modes, and analogous to/somewhat able to share graphics assets with CGA's "composite color" mode whilst remaining displayable on RGB monitors)
The Enhanced Graphics Adapter (EGA) is an IBM PC graphics adapter [2] [3] and de facto computer display standard from 1984 that superseded the CGA standard introduced with the original IBM PC, and was itself superseded by the VGA standard in 1987.
CGA: Color Graphics Adapter Introduced in 1981 by IBM, as the first colour display standard for the IBM PC. The standard CGA graphics cards were equipped with 16 kB video RAM. [1] 640×200 (128k) 320×200 (64k) 160×200 (32k) 640 200 128,000 16:5 16:10/8:5 4:5 (effectively 4:3 on CRTs; various aspects on LCDs) 1 bpp 2 bpp 4 bpp QVGA
In case of adapters that also have native color capabilities, such as the CGA, this technique can be further expanded by forming patterns out of the built-in colors - this way, the "real" subcarrier generated by the hardware will interfere with the "fake" one residing within the pixel patterns, causing the display to interpret the result as new ...
The additional memory can be used in graphics modes to double the color depth, giving two additional graphics modes—16 colors at 320 × 200 resolution, or 4 colors at 640 × 200 resolution. [4] It uses the same Motorola MC6845 display controller as the previous MDA and CGA adapters. [1] The original card also includes a parallel printer port.
The Hercules Graphics Card was released to fill a gap in the IBM video product lineup. When the IBM Personal Computer was launched in 1981, it had two graphics cards available: the Color Graphics Adapter (CGA) and the Monochrome Display And Printer Adapter (MDA).