Controls the visibility of the BG
u8 in RAM at 0xE000 called BG0_CONTROL
u8 in RAM at 0xE020 called BG1_CONTROL
u8 in RAM at 0xE040 called BG2_CONTROL
u8 in RAM at 0xE060 called BG3_CONTROL
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VxxxxxDD
V: RW Visible (1=visible, 0=hidden)
D: RW Depth (0=at the back, 3=in foreground)
u8 in RAM at 0xE001 called BG0_PIXELSCROLLX
u8 in RAM at 0xE021 called BG1_PIXELSCROLLX
u8 in RAM at 0xE041 called BG2_PIXELSCROLLX
u8 in RAM at 0xE061 called BG3_PIXELSCROLLX
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xxxxxSSS
S: RW Scroll Value (0..7)
u8 in RAM at 0xE002 called BG0_CELLSCROLLX
u8 in RAM at 0xE022 called BG1_CELLSCROLLX
u8 in RAM at 0xE042 called BG2_CELLSCROLLX
u8 in RAM at 0xE062 called BG3_CELLSCROLLX
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xSSSSSSS
S: RW Scroll Value (0..127)
u8 in RAM at 0xE003 called BG0_PIXELSCROLLY
u8 in RAM at 0xE023 called BG1_PIXELSCROLLY
u8 in RAM at 0xE043 called BG2_PIXELSCROLLY
u8 in RAM at 0xE063 called BG3_PIXELSCROLLY
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xxxxxSSS
S: RW Scroll Value (0..7)
u8 in RAM at 0xE004 called BG0_CELLSCROLLY
u8 in RAM at 0xE024 called BG1_CELLSCROLLY
u8 in RAM at 0xE044 called BG2_CELLSCROLLY
u8 in RAM at 0xE064 called BG3_CELLSCROLLY
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xxSSSSSS
S: RW Scroll Value (0..63)
u8 in RAM at 0xE005 called BG0_BASEPALETTE
u8 in RAM at 0xE025 called BG1_BASEPALETTE
u8 in RAM at 0xE045 called BG2_BASEPALETTE
u8 in RAM at 0xE065 called BG3_BASEPALETTE
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xBBBBB00
B: RW Palette# to use 0..127 (bottom two bits are ignored)
NOTE: The bottom two bits actually come from the ColorMap data.
NOTE: Default for BG0 is 0 (ColorMap data offers palettes 0..3)
NOTE: Default for BG1 is 4 (ColorMap data offers palettes 4..7)
NOTE: Default for BG2 is 8 (ColorMap data offers palettes 8..11)
NOTE: Default for BG3 is 12 (ColorMap data offers palettes 12..15)
u8 in RAM at 0xE006 called BG0_CURSOR_CONTROL
u8 in RAM at 0xE026 called BG1_CURSOR_CONTROL
u8 in RAM at 0xE046 called BG2_CURSOR_CONTROL
u8 in RAM at 0xE066 called BG3_CURSOR_CONTROL
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xxxxxxRE
E: RW Enabled (1=Cursor is enabled, 0=Cursor is disabled)
R: .W ResetFlash (1=Reset Flash timeout, and make cursor visible, 0=no change)
u8 in RAM at 0xE007 called BG0_CURSOR_X
u8 in RAM at 0xE027 called BG1_CURSOR_X
u8 in RAM at 0xE047 called BG2_CURSOR_X
u8 in RAM at 0xE067 called BG3_CURSOR_X
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xVVVVVVV
V: RW XPOS (0..127)
u8 in RAM at 0xE008 called BG0_CURSOR_Y
u8 in RAM at 0xE028 called BG1_CURSOR_Y
u8 in RAM at 0xE048 called BG2_CURSOR_Y
u8 in RAM at 0xE068 called BG3_CURSOR_Y
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xxVVVVVV
V: RW YPOS (0..63)
u8 in RAM at 0xE009 called BG0_CLIPRECT_CONTROL
u8 in RAM at 0xE029 called BG1_CLIPRECT_CONTROL
u8 in RAM at 0xE049 called BG2_CLIPRECT_CONTROL
u8 in RAM at 0xE069 called BG3_CLIPRECT_CONTROL
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EIxxxxAB
E: RW Enable (0=cliprect is ignored, 1=cliprect is functional)
I: RW Inverse (0=remove what's inside the box, 1=keep only what's inside the box)
A: RW X2BIT8 (The 9th (high) bit of the X2 coordinate)
B: RW X1BIT8 (The 9th (high) bit of the X1 coordinate)
u8 in RAM at 0xE00A called BG0_CLIPRECT_X1
u8 in RAM at 0xE02A called BG1_CLIPRECT_X1
u8 in RAM at 0xE04A called BG2_CLIPRECT_X1
u8 in RAM at 0xE06A called BG3_CLIPRECT_X1
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VVVVVVVV
V: RW X1 (The low 8 bits of the X1 coordinate)
NOTE: The high bit is in the cliprect control
u8 in RAM at 0xE00B called BG0_CLIPRECT_Y1
u8 in RAM at 0xE02B called BG1_CLIPRECT_Y1
u8 in RAM at 0xE04B called BG2_CLIPRECT_Y1
u8 in RAM at 0xE06B called BG3_CLIPRECT_Y1
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VVVVVVVV
V: RW Y1 (The Y1 coordinate)
u8 in RAM at 0xE00C called BG0_CLIPRECT_X2
u8 in RAM at 0xE02C called BG1_CLIPRECT_X2
u8 in RAM at 0xE04C called BG2_CLIPRECT_X2
u8 in RAM at 0xE06C called BG3_CLIPRECT_X2
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VVVVVVVV
V: RW X2 (The low 8 bits of the X2 coordinate)
NOTE: The high bit is in the cliprect control
u8 in RAM at 0xE00D called BG0_CLIPRECT_Y2
u8 in RAM at 0xE02D called BG1_CLIPRECT_Y2
u8 in RAM at 0xE04D called BG2_CLIPRECT_Y2
u8 in RAM at 0xE06D called BG3_CLIPRECT_Y2
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VVVVVVVV
V: RW Y2 (The Y2 coordinate)
#define BGCONTROL_DEPTH(n) ((n)&BGCONTROL_DEPTH_MASK)