There was not a mode switch, at least not on my OLPC. You switched from color to... | Hacker News

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bitwize on April 16, 2018 | parent | context | favorite | on: OLPC’s $100 laptop was going to change the world

There was not a mode switch, at least not on my OLPC. You switched from color to B&W by turning the backlight brightness all the way down (thus shutting off the backlight).

burfog on April 16, 2018 [–]

That was a mode switch.

Turning backlight brightness all the way down was the mode switch as presented in the UI. Very old versions of the UI made it explicit. At the MMIO level of course, there was a bit that got toggled.

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