• New video::Mode::new_with_scaling method
• New video::Scaling type
• Marked methods as inline to help avoid thunks when code is in RAM

• Add compare_and_swap_bool function
• Add power_control function

• Change palette constants to match the VGA standard.
• Use types from the neotron-ffi crate

• audio_mixer_channel_get_info now returns an Option not Result
• Add impl From<core::option::Option> for Option
• Add impl From<Option> for core::option::Option
• Add impl From<core::result::Result> for Result
• Add impl From<Result> for core::result::Result
• Clarify that some parameters are actually expected to be numeric IDs
• Use pc-keyboard::KeyCode to define Key Codes.

• Change time_get to time_clock_get
• Change time_set to time_clock_set
• Add time_ticks_get and time_ticks_per_second
• Add bus_interrupt_status
• Remove delay
• Add back in the block_XXX API for reading/writing Block Devices.
• Add idle function.
• memory_get_region returns Option, not Result
• Fix epoch used in conversion to chrono timestamp.

• Removed 'block_X' APIs
• Added 'bus_X' APIs
• Added 'audio_X' APIs
• Added 'i2c_X' APIs
• Added 'video_get/set_palette' APIs
• Added 'delay' API

• Added serial_read API
• Added video_mode_needs_vram API
• Added hid_get_event API
• Added hid_set_leds API
• Added video_wait_for_line API
• Added block_dev_get_info API
• Added block_write API
• Added block_read API
• Added block_verify API

• Changed memory_get_region to return a MemoryRegion
• Changed video_set_framebuffer to take a *const u8 not *mut u8 - as the BIOS doesn't change video RAM.

First version of the Neotron OS/BIOS API.