What capabilities are specific to the GBC ?

The GBC is basically a GB with these extra features:

* Colo(u)r capability including 8 sprite palettes & 8 background palettes

* Background tile attributes which include X/Y flipping

* Twice as much video RAM (16K) & four times more main RAM (32K)

* InfraRed (IR) send / receive interface

* Two new DMA modes for more powerful graphics capabilities

* Single-speed (same as GB) or double-speed CPU clock mode

* Link port pin 4 is an unrestricted digital input