Translate between Charles Babbage's computing jargon and modern terminology

If you're intending to build an analytical engine with a six-sided prism to run Charles Babbage's weird cardboard vaporware program, you will need some help with Babbage's notes, as old Charles was inventing a whole technical vocab from scratch. Read the rest

Pre-Nixie digital: the amazing world of edge-lit displays

Before there were Nixie tubes, there were edge-lit displays: "Each digit panel has a tiny incandescent lamp associated with it that lights when that the numeral on the panel is to be displayed. When the tiny lamp corresponding to a given digit panel lights, the light is injected into the edge of the plastic panel. The engraved area in the plastic causes interference with the light as it travels through the plastic, and some light is refracted out through the plane of the panel, causing the engraved dots making up the digit to light up with a white glow. The resulting digits look much like the fully formed numerals in a Nixie tube, except rather than an orange glow, the Canon display digits give off a cool white glow like that of an incandescent light bulb." Read the rest

Found at a thrift shop: the last record of a doomed Apple DRM effort from 1979

Redditor Vadermeer was in a local Goodwill Outlet and happened on a trove of files from Apple engineer Jack MacDonald from 1979-80, when he was manager of system software for the Apple II and ///. Read the rest

Breaking the DRM on the 1982 Apple ][+ port of Burger Time

4AM is a prolific computer historian whose practice involves cracking the copy protection on neglected Apple ][+ floppy disks, producing not just games, but voluminous logs that reveal the secret history of the cat-and-mouse between crackers and publishers. Read the rest