Hercules’ resolution was enormous at the time, and was still useful for many, many years after the introduction of the superior VGA. Most dual-monitor setups in the DOS era used Hercules for a ...

Typically, a VGA port has several small holes in three lines. The last and most important mode, ‘Extend’ lets you extend your actual working area to the second monitor. The dual monitor setup ...

There are a few different reasons to use a dual monitor setup on ... you're planning on using. Some monitors connect via USB cable, some connect via VGA cable, and some connect via HDMI.