Amiga Screens: A Primer explains how the Amiga operating system defines a screen as a distinct display area, unlike modern fixed-resolution setups. Focusing on the OCS (Original Chip Set), the article details how screens could vary in resolution and color depth, a flexibility born from CRT monitor era and expensive RAM. It contrasts this with today's single, static display.

The text delves into the technical mechanics of Amiga screens, specifically the use of indexed palettes and planar graphics. It describes how color is managed through a limited set of registers and how bitplanes (bpl) are used to construct pixel colors. On OCS and ECS, the maximum bitplanes depend on the display resolution, with low-res supporting up to 32 colors (5 bpl) and high-res up to 16 colors (4 bpl) on PAL systems. The article notes that while later ECS and AGA upgrades removed some limitations, the core principles of screen management remained consistent across Amiga hardware generations.