sehugg / dithertron

Retro 8-bit bitmap converter supporting many formats
GNU General Public License v3.0
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add MC6847 CG2,3,6 modes #9

Closed nippur72 closed 1 year ago

nippur72 commented 1 year ago

this PR adds some graphic modes for the Motorola MC6847 video chip:

CG2: 128x64 x 4 colors (2 palettes) CG3: 128x96 x 4 colors (2 palettes) CG6: 128x192 x 4 colors (2 palettes)

The MC6847 appeared in several 8 bit computers, including Dragon32, TRS80 Coco, MC10, Laser 210/VZ200 and so on...