Screenshot of an NES program rendering about 1.25 KiB of text in a proportional font, using pattern table trickery to make a 1bpp bitmap cover the entire screen.
The text is H. Rackham's translation of a famous passage from On the Ends of Goods and Evils by M.T. Cicero, from Lipsum.com.
I chose the English text because it's so much more plausible than dropping in corrupt Latin. "Lorem ipsum" or other nonsense copy in a design distracts both designers and their clients because the experience when testing the design doesn't resemble the end reader's experience. Instead, a designer should use plausible text, such as a rough draft of production text.[1]
This Cicero quotation is especially relevant to someone developing software for obsolete platforms, which some see as overly painful but which ultimately leads to pleasure.