Not bugs. IBM literally wired up the keyboard controller to trigger the CPU's reset pin on request as a workaround for getting back to real mode. But not every

Not bugs. IBM literally wired up the keyboard controller to trigger the CPU's reset pin on request as a workaround for getting back to real mode. But not every system has that feature. Some motherboard chipsets had an even faster method for triggering reset; it was all very non-standard. But the most compatible way to get back to real mode on a 286 was by triggering a triple fault.