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PET used a clone of the Motorola 6845 (also found in MDA and CGA adapters for the IBM PC). https://en.m.wikipedia.org/wiki/Motorola_6845 https://en.m.wikipedia
by basementcat 2y ago
PET used a clone of the Motorola 6845 (also found in MDA and CGA adapters for the IBM PC).
https://en.m.wikipedia.org/wiki/Motorola_6845 https://en.m.wikipedia.org/wiki/Motorola_6845
https://retrocomputing.stackexchange.com/questions/7117/how-did-the-commodore-pet-80-column-display-work https://retrocomputing.stackexchange.com/questions/7117/how-...
- PaulHoule 2y agoSee also https://en.m.wikipedia.org/wiki/List_of_home_computers_by_video_hardware https://en.m.wikipedia.org/wiki/List_of_home_computers_by_vi... Note Don Lancaster's technique used for video in some computers https://www.tinaja.com/ebooks/cvcb1.pdf https://www.tinaja.com/ebooks/cvcb1.pdf such as https://en.wikipedia.org/wiki/ZX80 https://en.wikipedia.org/wiki/ZX80 In some strange sense this is like using a microcontroller to implement a CRTC except you're using the main CPU to do the work.
- jecel 2y agoThe first couple of models used TTLs for the video circuit. These were replaced with the 6845 later on.