Bugs to fix: - Left-vram overflow when rendering text - A few key hits ignored after leaving the application (could not reproduce) - Lost keyboard control at startup (could not reproduce) Simple improvements: - bopti: Monochrome bitmaps blending modes - bopti: Partial transparency - demo: Try 284x124 at (-60, -28) (all disadvantages) - display: Rectangle-based drawing functions - tales: Test all font encodings - time: Compute CLOCKS_PER_SEC - core: Add VBR handlers debugging information (if possible) - core: Implement all callbacks and a complete user API - project: Enhance Makefile install_lib rules Modules to implement: - Serial communication - Sound playback and synthesizing - Handle errors within errno Things to investigate: - Packed bit fields alignment - Registers that may need to be saved within setjmp() - Registers that may need to be saved and restored by gint - Possible bug when optimizing __attribute__((interrupt_handler)) Configuration: - ATEXIT_MAX (16) - RTC_CB_ARRAY_SIZE (5) - EVENTS_QUEUE_SIZE (64) - GINT_NO_SYSCALLS (undefined)