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93 lines
2.7 KiB
93 lines
2.7 KiB
2 years ago
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;; Game Boy Constants
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; Interrupt Flags
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INTERRUPT_SETTINGS EQU $ffff
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INT_VBLANK_ON EQU %00000001
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INT_VBLANK_OFF EQU %00000000
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INT_LCDC_ON EQU %00000010
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INT_LCDC_OFF EQU %00000000
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INT_TIMER_ON EQU %00000100
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INT_TIMER_OFF EQU %00000000
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INT_SERIAL_ON EQU %00001000
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INT_SERIAL_OFF EQU %00000000
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; LCD Control
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LCD_CONTROL_REGISTER EQU $ff40
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LCD_POSITION_REGISTER EQU $ff44
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BKG_DISPLAY_ON EQU %00000001
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BKG_DISPLAY_OFF EQU %00000000
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OBJ_DISPLAY_ON EQU %00000010
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OBJ_DISPLAY_OFF EQU %00000000
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OBJ_SIZE_8X8 EQU %00000000
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OBJ_SIZE_16X8 EQU %00000100
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BKG_USE_LOC_9800 EQU %00000000
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BKG_USE_LOC_9C00 EQU %00001000
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TLS_USE_LOC_8800 EQU %00000000
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TLS_USE_LOC_8000 EQU %00010000
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WND_DISPLAY_ON EQU %00100000
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WND_DISPLAY_OFF EQU %00000000
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WND_USE_LOC_9800 EQU %00000000
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WND_USE_LOC_9C00 EQU %01000000
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DISPLAY_ON EQU %10000000
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DISPLAY_OFF EQU %00000000
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; LCD Status
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LCD_STATUS_REGISTER EQU $ff41
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LCD_VBLANK_MODE EQU %00000000
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LCD_HBLANK_MODE EQU %00000001
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LCD_SPRITE_MODE EQU %00000010
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LCD_TRANSFER_ACTIVE EQU %00000011
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; Timer
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TIMER_REGISTER EQU $ff06
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TIMER_SETTINGS EQU $ff07
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TIMER_4KHZ EQU %00000000
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TIMER_16KHZ EQU %00000011
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TIMER_65KHZ EQU %00000010
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TIMER_262KHZ EQU %00000001
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TIMER_START EQU %00000100
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TIMER_STOP EQU %00000000
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; Input Register
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INPUT_REGISTER EQU $ff00
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INPUT_A EQU %00000001
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INPUT_B EQU %00000010
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INPUT_SELECT EQU %00000100
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INPUT_START EQU %00001000
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INPUT_RIGHT EQU %00010000
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INPUT_LEFT EQU %00100000
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INPUT_UP EQU %01000000
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INPUT_DOWN EQU %10000000
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; Video Registers
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BKG_POS_X_REGISTER EQU $ff43
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BKG_POS_Y_REGISTER EQU $ff42
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WND_POS_X_REGISTER EQU $ff4b
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WND_POS_Y_REGISTER EQU $ff4a
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; DMA Register
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DMA_REGISTER EQU $ff46
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; Palette Registers
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PALETTE_BKG_REGISTER EQU $ff47
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PALETTE_OBJ0_REGISTER EQU $ff48
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PALETTE_OBJ1_REGISTER EQU $ff49
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; Video Locations
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TLS_LOC_8000 EQU $8000
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TLS_LOC_8800 EQU $8800
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BKG_LOC_9800 EQU $9800
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BKG_LOC_9C00 EQU $9C00
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WND_LOC_9800 EQU $9800
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WND_LOC_9C00 EQU $9c00
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; Object attributes
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OBJ_ATTR_PALETTE0 EQU %00000000
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OBJ_ATTR_PALETTE1 EQU %00010000
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OBJ_ATTR_MIRROR_X EQU %00100000
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OBJ_ATTR_MIRROR_Y EQU %01000000
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OBJ_ATTR_PRIORITY EQU %10000000
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; Initial Stack Pointer
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INITIAL_STACK_POINTER EQU $fff4
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