Summary
This episode explores the fascinating history of dual-monitor support in DOS-era computing, specifically how games like Command and Conquer could output debug information to a secondary monochrome monitor. Jason explains that PC memory architecture reserved specific address ranges for different display adapters (B0000h for monochrome, A000h or B8000h for color/VGA), allowing programs to write to both displays simultaneously without OS support. He demonstrates this technique using DOSBox-X with a dual-monitor configuration, showing both Mah Jongg VGA (a commercial game that used dual displays) and his own simple assembly program that writes characters to both monitors.