Questions tagged [6845]

Questions about the Motorola MC6845 CRT Controller chip, or clones of it (e.g. MOS 6545).

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How did the Commodore PET 80 column display work?

Some variants of the Commodore PET (e.g. the 8000 and 9000 series, as well as some other versions with an aftermarket add-on) produce an 80x25 character display. Their character set is fixed in ROM ...