Custom Chips refer to the proprietary integrated circuits designed by Commodore specifically for the Amiga computer architecture, including the Agnus (blitter and DMA), Denise (video display), and Paula (audio and floppy) chips. These custom co-processors formed the heart of the Amiga's advanced multimedia capabilities, enabling features like hardware scrolling, sprites, and direct memory access without burdening the main CPU. The chipset evolved through generations including OCS, ECS, and AGA, defining the graphics and sound capabilities of different Amiga models.