Device driver for an Hitachi (Renesas) HD66773 controller.

This controller can be driven using a 6800 bus, 8080 bus, or by SPI.

This is 132x176x64K colors.

The device can be 0x70 or 0x74 depending on the ID pin.

API Summary

hd66773_setup_begin_bus Start driver initialization (bus)
hd66773_setup_begin_spi Start driver initialization (SPI)
hd66773_setup_end Complete driver initialization