| Address | stdgba | Access | Type | tonclib |
|---|
0x4000000 | reg_dispcnt | RW | display_control | REG_DISPCNT |
0x4000004 | reg_dispstat | RW | display_status | REG_DISPSTAT |
0x4000006 | reg_vcount | R | const unsigned short | REG_VCOUNT |
struct display_control {
unsigned short video_mode : 3; // Video mode (0-5)
bool cgb : 1; // CGB mode flag (read-only)
unsigned short page : 1; // Page select for mode 4/5
bool hblank_oam_free : 1; // Allow OAM access during HBlank
bool linear_obj_tilemap : 1; // OBJ VRAM 1D mapping
bool disable : 1; // Force blank
bool enable_bg0 : 1;
bool enable_bg1 : 1;
bool enable_bg2 : 1;
bool enable_bg3 : 1;
bool enable_obj : 1;
bool enable_win0 : 1;
bool enable_win1 : 1;
bool enable_obj_win : 1;
};
gba::reg_dispcnt = { .video_mode = 3, .enable_bg2 = true };
struct display_status {
const bool currently_vblank : 1;
const bool currently_hblank : 1;
const bool currently_vcount : 1;
bool enable_irq_vblank : 1;
bool enable_irq_hblank : 1;
bool enable_irq_vcount : 1;
short : 2;
unsigned short vcount_setting : 8; // VCount trigger value
};
gba::reg_dispstat = { .enable_irq_vblank = true };