The TestM diagnostic mode offers 26 tests, which range from testing the cameras, touchscreen, microphone, and even the haptic engine, to a comprehensive stress test that pushes ...
On the occasion of ThinkPad's 25th birthday, we recall some of IBM's best known creations: from the Selectric typewriter to the IBM PC to the iconic laptop brand acquired by Lenovo in 2005.
The IBM PC monitor, announced in 1981, could output both text and graphics.
It could manage two graphics modes, a resolution of 320 x 200 pixels with up to four colours or 640 x 200 pixels with a monochrome display.
The monitor had four text modes, based on either 40 columns by 25 lines or 80 columns by 25 lines, with up to 16 colours.
It was usually driven by an IBM PC Color/Graphics Adapter (CGA), which included a Motorola MC6845 display controller and 16KB of video memory. It had a 4-bit RGB1 interface.
Caption by: Nick Heath
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