75 lines
1.6 KiB
Python
75 lines
1.6 KiB
Python
"""
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Some info.
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Size =
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0 = 1BDh
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1 = 3BDh
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Tilemap screen1 base = 800h
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Tilemap screen2 base = 1000h
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Tileset base = 2000h
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Sprite base = 1800h
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0000:7000 store the screen orientation
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0000:7001 and onward can be used by the boot splash for variables
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Splash flags, bit 7 > 0 = 1BPP tiles, 1 = 2BPP tiles
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bit 4-0 store amount of palettes to copy.
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For 1bpp tiles, each palettes store 2 colours.
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For 2bpp tiles, each palettes store 4 colours.
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Splash data is copied at
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0600:0000
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Avail color for console name:
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0600:06e6 [0] 0h, F00h, F70h, FF0h
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0600:06ee [4] 7F0h, F0h, F7h, FFh
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0600:06f6 [8] 7Fh, Fh, 70Fh, F0Fh
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0600:06fe [12] F07h, FFFh, 777h
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On the VBlank code,
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CS = 0600h
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DS = 0600h
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ES = ??
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SS = 0000h
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struct bootsplash_t
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{
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uint8_t padding[3];
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uint8_t consoleFlags;
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uint8_t consoleNameColor;
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uint8_t padding2;
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uint8_t size;
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uint8_t startFrame;
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uint8_t endFrame;
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uint8_t spriteCount;
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uint8_t paletteFlags;
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uint8_t tilesCount;
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uint16_t paletteOffset;
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uint16_t tilesetOffset;
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uint16_t tilemapOffset;
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uint16_t horizontalTilemapDestOffset;
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uint16_t verticalTilemapDestOffset;
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uint8_t tilemapWidth;
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uint8_t tilemapHeight;
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uint32_t splashCodePointer;
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uint16_t consoleNameHorizontalPos;
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uint16_t consoleNameVerticalPos;
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uint8_t padding3[2];
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uint16_t soundSampleOffset;
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uint16_t soundChannelDataOffset[3]
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};
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Sounds seems to be
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uint32_t
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duration (8 bit) (in vblank)
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Volume (8bit)
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Pitch (16bit)
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if pitch bit 7 is set then the channel is stopped.
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""" |