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  1. CMR

    Copied from another person’s response:

    Every other character in video memory is having bit 3 zero’ed (this probably works out to every 4th byte taking into account the color byte in text mode). “i” (0x69) becomes “a” (0x61) “o” (0x6F) becomes “g” (0x67) “l” (0x6C) becomes “d” (0x64) “,” (0x2C) becomes “$” (0x24) etc. EDIT: After Killobyte’s comment, a closer look shows it’s every 4th character, not every other character.