The HD66773, controller driver LSI, displays 132RGB-by-176 dot graphics on TFT displays in 260,000
colors. The HD66773’s bit-operation functions, 18-bit high-speed bus interface, and high-speed RAMwrite
functions enable efficient data transfer and high-speed rewriting of data to the graphic RAM.
This structure defines the interface between the low-level tty driver and the tty routines. The following routines can be defined unless noted otherwise, they are optional, and can be filled in with a null pointer.
