It’s not that IBM invented the personal computer — far from it. But the birth of the PC brought personal computers to the mainstream, especially in offices, and — much to IBM’s chagrin ...

(Video embedded, below) As luck would have it, [Oli] owns a 40-year-old IBM PC 5150 as well as the matching IBM 5151 monitor, so it was a simple matter to implement the effect in 8088 assembler to ...