VDP main. More...

Defines
#define	GFX_DATA_PORT 0xC00000
	VDP Data port address.
#define	GFX_CTRL_PORT 0xC00004
	VDP Control port address.
#define	GFX_HVCOUNTER_PORT 0xC00008
	VDP HV counter port address.
#define	VDP_FIFOEMPTY_FLAG (1 << 9)
	VDP FIFO empty flag.
#define	VDP_FIFOFULL_FLAG (1 << 8)
	VDP FIFO full flag.
#define	VDP_VINTPENDING_FLAG (1 << 7)
	VDP Vertical interrupt pending flag.
#define	VDP_SPROVERFLOW_FLAG (1 << 6)
	VDP sprite overflow flag.
#define	VDP_SPRCOLLISION_FLAG (1 << 5)
	VDP sprite collision flag.
#define	VDP_ODDFRAME_FLAG (1 << 4)
	VDP odd frame flag.
#define	VDP_VBLANK_FLAG (1 << 3)
	VDP Vertical blanking flag.
#define	VDP_HBLANK_FLAG (1 << 2)
	VDP Horizontal blanking flag.
#define	VDP_DMABUSY_FLAG (1 << 1)
	VDP DMA busy flag.
#define	VDP_PALMODE_FLAG (1 << 0)
	VDP PAL mode flag.
#define	VDP_PLAN_A VDP_BG_A
#define	VDP_PLAN_B VDP_BG_B
#define	VDP_PLAN_WINDOW VDP_WINDOW
#define	VDP_BG_A bga_addr
	VDP background A tilemap address in VRAM.
#define	VDP_BG_B bgb_addr
	VDP background B tilemap address in VRAM.
#define	VDP_WINDOW window_addr
	VDP window tilemap address in VRAM.
#define	VDP_HSCROLL_TABLE hscrl_addr
	VDP horizontal scroll table address in VRAM.
#define	VDP_SPRITE_TABLE slist_addr
	VDP sprite list table address in VRAM.
#define	VDP_MAPS_START maps_addr
	Address in VRAM where tilemaps start (= address of first tilemap / table in VRAM).
#define	HSCROLL_PLANE 0
	Definition to set horizontal scroll to mode plane.
#define	HSCROLL_TILE 2
	Definition to set horizontal scroll to mode tile.
#define	HSCROLL_LINE 3
	Definition to set horizontal scroll to mode line.
#define	VSCROLL_PLANE 0
	Definition to set vertical scroll to mode plane.
#define	VSCROLL_COLUMN 1
	Definition to set vertical scroll to mode column (2 tiles width).
#define	VSCROLL_2TILE VSCROLL_COLUMN
#define	INTERLACED_NONE 0
	Interlaced scanning mode disabled. That is the default mode for the VDP.
#define	INTERLACED_MODE1 1
	Interlaced Scanning Mode 1 - 8x8 dots per cell (normal vertical resolution) In Interlaced Mode 1, the same pattern will be displayed on the adjacent lines of even and odd numbered fields.
#define	INTERLACED_MODE2 2
	Interlaced Scanning Mode 2 - 8x16 dots per cell (double vertical resolution) In Interlaced Mode 2, different patterns can be displayed on the adjacent lines of even and odd numbered fields.
#define	FONT_LEN 96
	SGDK font length.
#define	TILE_SIZE 32
	Size of a single tile in byte.
#define	TILE_INDEX_MASK (0xFFFF / TILE_SIZE)
#define	TILE_SPACE VDP_MAPS_START
	Space in byte for tile in VRAM (tile space ends where tilemaps starts)
#define	TILE_MAXNUM (TILE_SPACE / TILE_SIZE)
	Maximum number of tile in VRAM (related to TILE_SPACE).
#define	TILE_MAXINDEX (TILE_MAXNUM - 1)
	Maximum tile index in VRAM (related to TILE_MAXNUM).
#define	TILE_SYSTEMINDEX 0x0000
	System base tile index in VRAM.
#define	TILE_SYSTEMLENGTH 16
	Number of system tile.
#define	TILE_SYSTEMLENGHT TILE_SYSTEMLENGTH
#define	TILE_USERINDEX (TILE_SYSTEMINDEX + TILE_SYSTEMLENGTH)
	User base tile index.
#define	TILE_FONTINDEX (TILE_MAXNUM - FONT_LEN)
	Font base tile index.
#define	TILE_SPRITEINDEX (TILE_FONTINDEX - spriteVramSize)
	Sprite engine base tile index (equal TILE_FONTINDEX if Sprite Engine is not initialized).
#define	TILE_USERLENGTH ((userTileMaxIndex - TILE_USERINDEX) + 1)
	Number of available user tile.
#define	TILE_USERLENGHT TILE_USERLENGTH
#define	TILE_USERMAXINDEX userTileMaxIndex
	Maximum tile index in VRAM reserved for user (for background and user managed sprites)
#define	TILE_SYSTEM (TILE_SYSTEMINDEX * TILE_SIZE)
	System tile address in VRAM.
#define	TILE_USER (TILE_USERINDEX * TILE_SIZE)
	User tile address in VRAM.
#define	TILE_FONT (TILE_FONTINDEX * TILE_SIZE)
	Font tile address in VRAM.
#define	PAL0 0
	Palette 0.
#define	PAL1 1
	Palette 1.
#define	PAL2 2
	Palette 2.
#define	PAL3 3
	Palette 3.
#define	GFX_READ_VRAM_ADDR(adr) (((0x0000 + ((adr) & 0x3FFF)) << 16) + (((adr) >> 14) \| 0x00))
	Set VDP command to read specified VRAM address.
#define	GFX_READ_CRAM_ADDR(adr) (((0x0000 + ((adr) & 0x7F)) << 16) + 0x20)
	Set VDP command to read specified CRAM address.
#define	GFX_READ_VSRAM_ADDR(adr) (((0x0000 + ((adr) & 0x3F)) << 16) + 0x10)
	Set VDP command to read specified VSRAM address.
#define	GFX_WRITE_VRAM_ADDR(adr) (((0x4000 + ((adr) & 0x3FFF)) << 16) + (((adr) >> 14) \| 0x00))
	Set VDP command to write at specified VRAM address.
#define	GFX_WRITE_CRAM_ADDR(adr) (((0xC000 + ((adr) & 0x7F)) << 16) + 0x00)
	Set VDP command to write at specified CRAM address.
#define	GFX_WRITE_VSRAM_ADDR(adr) (((0x4000 + ((adr) & 0x3F)) << 16) + 0x10)
	Set VDP command to write at specified VSRAM address.
#define	GFX_DMA_VRAM_ADDR(adr) (((0x4000 + ((adr) & 0x3FFF)) << 16) + (((adr) >> 14) \| 0x80))
	Set VDP command to issue a DMA transfert to specified VRAM address.
#define	GFX_DMA_CRAM_ADDR(adr) (((0xC000 + ((adr) & 0x7F)) << 16) + 0x80)
	Set VDP command to issue a DMA transfert to specified CRAM address.
#define	GFX_DMA_VSRAM_ADDR(adr) (((0x4000 + ((adr) & 0x3F)) << 16) + 0x90)
	Set VDP command to issue a DMA transfert to specified VSRAM address.
#define	GFX_DMA_VRAMCOPY_ADDR(adr) (((0x4000 + ((adr) & 0x3FFF)) << 16) + (((adr) >> 14) \| 0xC0))
	Set VDP command to issue a DMA VRAM copy to specified VRAM address.
#define	GFX_VERT_SCROLL(adr) GFX_WRITE_VSRAM_ADDR(adr)
	Helper to write in vertical scroll table (same as GFX_WRITE_VSRAM_ADDR).
#define	GFX_HORZ_SCROLL(adr) GFX_WRITE_VRAM_ADDR(VDP_SCROLL_H + (adr))
	Helper to write in horizontal scroll table (same as GFX_WRITE_VRAM_ADDR(VDP_SCROLL_H + adr)).
#define	GET_VDPSTATUS(flag) (((vu16)(GFX_CTRL_PORT)) & (flag))
	Tests VDP status against specified flag (see VDP_XXX_FLAG).
#define	IS_PALSYSTEM GET_VDPSTATUS(VDP_PALMODE_FLAG)
	Tests if current system is a PAL system (50 Hz).
#define	GET_HVCOUNTER ((vu16)(GFX_HVCOUNTER_PORT))
	Returns HV counter.
#define	GET_HCOUNTER (GET_HVCOUNTER & 0xFF)
	Returns Horizontal counter.
#define	GET_VCOUNTER (GET_HVCOUNTER >> 8)
	Returns Vertical counter.
Enumerations
enum	VDPPlane { BG_A = 0, BG_B = 1, WINDOW = 2 }
	Type used to define on which plane to work (used by some methods).
Functions
void	VDP_init ()
	Initialize the whole VDP sub system.
void	VDP_resetScreen ()
	Reset background planes and palettes.
u8	VDP_getReg (u16 reg)
	Get VDP register value.
void	VDP_setReg (u16 reg, u8 value)
	Set VDP register value.
u8	VDP_getEnable ()
	Returns VDP enable state.
void	VDP_setEnable (u8 value)
	Set VDP enable state.
u16	VDP_getScanlineNumber ()
	Returns number of total scanline.
u16	VDP_getScreenHeight ()
	Returns vertical screen resolution.
void	VDP_setScreenHeight224 ()
	Set vertical resolution to 224 pixels.
void	VDP_setScreenHeight240 ()
	Set vertical resolution to 240 pixels.
u16	VDP_getScreenWidth ()
	Returns horizontal screen resolution.
void	VDP_setScreenWidth256 ()
	Set horizontal resolution to 256 pixels.
void	VDP_setScreenWidth320 ()
	Set horizontal resolution to 320 pixels.
u16	VDP_getPlaneWidth ()
	Return background plane width (in tile).
u16	VDP_getPlaneHeight ()
	Return background plane height (in tile).
void	VDP_setPlaneSize (u16 w, u16 h, bool setupVram)
	Set background plane size (in tile). WARNING: take attention to properly setup VRAM so tilemaps has enough space.
void	VDP_setPlanSize (u16 w, u16 h)
u8	VDP_getHorizontalScrollingMode ()
	Returns plane horizontal scrolling mode.
u8	VDP_getVerticalScrollingMode ()
	Returns plane vertical scrolling mode.
void	VDP_setScrollingMode (u16 hscroll, u16 vscroll)
	Set plane scrolling mode.
u8	VDP_getBackgroundColor ()
	Returns the background color index.
void	VDP_setBackgroundColor (u8 value)
	Set the background color index.
u8	VDP_getAutoInc ()
	Returns auto increment register value.
void	VDP_setAutoInc (u8 value)
	Set auto increment register value.
u8	VDP_getDMAEnabled ()
	Returns DMA enabled state.
void	VDP_setDMAEnabled (u8 value)
	Set DMA enabled state.
u8	VDP_getHVLatching ()
	Returns HV counter latching on INT2 (used for light gun)
void	VDP_setHVLatching (u8 value)
	Set HV counter latching on INT2 (used for light gun)
void	VDP_setHInterrupt (u8 value)
	Enable or Disable Horizontal interrupt.
void	VDP_setExtInterrupt (u8 value)
	Enable or Disable External interrupt.
void	VDP_setHilightShadow (u8 value)
	Enable or Disable Hilight / Shadow effect.
u8	VDP_getHIntCounter ()
	Get Horizontal interrupt counter value.
void	VDP_setHIntCounter (u8 value)
	Set Horizontal interrupt counter value.
u16	VDP_getBGAAddress ()
	Get VRAM address (location) of BG A tilemap.
u16	VDP_getBGBAddress ()
	Get VRAM address (location) of BG B tilemap.
u16	VDP_getAPlanAddress ()
u16	VDP_getBPlanAddress ()
u16	VDP_getWindowAddress ()
	Get VRAM address (location) of Window tilemap.
u16	VDP_getWindowPlanAddress ()
u16	VDP_getSpriteListAddress ()
	Get VRAM address (location) of Sprite list.
u16	VDP_getHScrollTableAddress ()
	Get VRAM address (location) of H SCroll table.
void	VDP_setBGAAddress (u16 value)
	Set VRAM address (location) of BG A tilemap. The address should be at multiple of $2000 Ex: VDP_setBGAAddress(0xC000) Will set the BG A to at address 0xC000 in VRAM.
void	VDP_setBGBAddress (u16 value)
	Set VRAM address (location) of BG B tilemap. The address should be at multiple of $2000 Ex: VDP_setBGBAddress(0xE000) Will set the BG B tilemap at address 0xE000 in VRAM.
void	VDP_setAPlanAddress (u16 value)
void	VDP_setBPlanAddress (u16 value)
void	VDP_setWindowAddress (u16 value)
	Set VRAM address (location) of Window tilemap. The address should be at multiple of $1000 in H40 and $800 in H32 Ex: VDP_setWindowAddress(0xA000) Will set the Window tilemap at address 0xA000 in VRAM.
void	VDP_setWindowPlanAddress (u16 value)
void	VDP_setSpriteListAddress (u16 value)
	Set VRAM address (location) of Sprite list. The address should be at multiple of $400 in H40 and $200 in H32 Ex: VDP_setSpriteListAddress(0xD800) Will set the Sprite list to at address 0xD800 in VRAM.
void	VDP_setHScrollTableAddress (u16 value)
	Set VRAM address (location) of H Scroll table. The address should be at multiple of $400 Ex: VDP_setHScrollTableAddress(0xD400) Will set the HScroll table to at address 0xD400 in VRAM.
void	VDP_setScanMode (u16 mode)
	Sets the scan mode of the display.
void	VDP_setWindowHPos (u16 right, u16 pos)
	Sets the window Horizontal position.
void	VDP_setWindowVPos (u16 down, u16 pos)
	Sets the window Vertical position.
void	VDP_waitDMACompletion ()
	Wait for DMA operation to complete.
void	VDP_waitFIFOEmpty ()
	Wait for VDP FIFO to be empty.
bool	VDP_waitVInt ()
	Wait for next Vertical Interruption.
bool	VDP_waitVBlank (bool forceNext)
	Wait for next vertical blank period (same as VDP_waitVSync())
bool	VDP_waitVSync ()
	Wait for Vertical Synchro.
void	VDP_waitVActive (bool forceNext)
	Wait for next vertical active area (end of vertical blank period)
u16	VDP_getAdjustedVCounter ()
	Return an enhanced V Counter representation.
void	VDP_showFPS (u16 asFloat)
	Display number of Frame Per Second.
void	VDP_showCPULoad ()
	Display the estimated CPU load (in %).
Variables
u16	window_addr
u16	bga_addr
u16	bgb_addr
u16	hscrl_addr
u16	slist_addr
u16	maps_addr
u16	userTileMaxIndex
u16	screenWidth
	Current screen width (horizontale resolution)
u16	screenHeight
	Current screen height (verticale resolution)
u16	planeWidth
	Current background plane width (in tile)
u16	planeHeight
	Current background plane height (in tile)
u16	windowWidth
	Current window width (in tile)
u16	planeWidthSft
	Current background plane width bit shift.
u16	planeHeightSft
	Current background plane height bit shift.
u16	windowWidthSft
	Current window width bit shift.

Detailed Description

VDP main.

Author:: Stephane Dallongeville

Date:: 08/2011

This unit provides general VDP (Video Display Processor) methods:

initialisation
get / set register
get / set resolution
enable / disable VDP features

WARNING: It's very important that VRAM is organized with tile data being located before tilemaps and tables:
0000-XXXX = tile data
XXXX-FFFF = tilemaps & tables (H scroll table, sprite table, B/A plane and window plane).

If you don't respect that you may get in troubles as SGDK expect it ;)

Define Documentation

#define TILE_SYSTEMLENGHT TILE_SYSTEMLENGTH

Deprecated:: Use TILE_SYSTEMLENGTH instead.

#define TILE_USERLENGHT TILE_USERLENGTH

Deprecated:: Use TILE_USERLENGTH instead.

#define VDP_PLAN_A VDP_BG_A

Deprecated:: Use VDP_BG_A instead

#define VDP_PLAN_B VDP_BG_B

Deprecated:: Use VDP_BG_B instead

#define VDP_PLAN_WINDOW VDP_WINDOW

Deprecated:: Use VDP_WINDOW instead

#define VSCROLL_2TILE VSCROLL_COLUMN

Deprecated:: Use VSCROLL_COLUMN instead

Function Documentation

u16 VDP_getAdjustedVCounter ( )

Return an enhanced V Counter representation.

Using direct V counter from VDP may give troubles as the VDP V-Counter rollback during V-Blank period.
This function aim to make ease the use of V-Counter by adjusting it to a [0-255] range where 0 is the start of VBlank area and 255 the end of active display area.

u16 VDP_getAPlanAddress ( )

Deprecated:: Use VDP_getBGAAddress(..) instead.

u16 VDP_getBPlanAddress ( )

Deprecated:: Use VDP_getBGBAddress(..) instead.

u8 VDP_getHorizontalScrollingMode ( )

Returns plane horizontal scrolling mode.

Possible values are: HSCROLL_PLANE, HSCROLL_TILE, HSCROLL_LINE

See also:: VDP_setScrollingMode for more informations about scrolling mode.

u8 VDP_getReg ( u16 reg )

Get VDP register value.

Parameters:

reg	Register number we want to retrieve value.

Returns:: specified register value.

u16 VDP_getScanlineNumber ( )

Returns number of total scanline.

312 for PAL system and 262 for NTSC system.

u16 VDP_getScreenHeight ( )

Returns vertical screen resolution.

Always returns 224 on NTSC system as they only support this mode.
PAL system supports 240 pixels mode.

u16 VDP_getScreenWidth ( )

Returns horizontal screen resolution.

Returns 320 or 256 depending current horizontal resolution mode.

u8 VDP_getVerticalScrollingMode ( )

Returns plane vertical scrolling mode.

Possible values are: VSCROLL_PLANE, VSCROLL_2TILE

See also:: VDP_setScrollingMode for more informations about scrolling mode.

u16 VDP_getWindowPlanAddress ( )

Deprecated:: Use VDP_getWindowAddress(..) instead.

void VDP_init ( )

Initialize the whole VDP sub system.

Reset VDP registers, reset sprites then call VDP_resetScreen() to reset BG and palettes.

void VDP_resetScreen ( )

Reset background planes and palettes.

Reset VRAM (clear BG planes and reload font), reset scrolls and reset palettes (set to default grey / red / green / blue ramps).

void VDP_setAPlanAddress ( u16 value )

Deprecated:: Use VDP_setBGAAddress(..) instead.

void VDP_setBPlanAddress ( u16 value )

Deprecated:: Use VDP_setBGBAddress(..) instead.

void VDP_setDMAEnabled ( u8 value )

Set DMA enabled state.

Note that by default SGDK always enable DMA (there is no reason to disable it)

void VDP_setEnable ( u8 value )

Set VDP enable state.

You can temporary disable VDP to speed up VDP memory transfert.

void VDP_setExtInterrupt ( u8 value )

Enable or Disable External interrupt.

See also:: VDP_setExtIntCounter()

void VDP_setHIntCounter ( u8 value )

Set Horizontal interrupt counter value.

When Horizontal interrupt is enabled, setting 5 here means that H int will occurs each (5+1) scanline.
Set value 0 to get H int at each scanline.

void VDP_setHInterrupt ( u8 value )

Enable or Disable Horizontal interrupt.

See also:: VDP_setHIntCounter()

void VDP_setHVLatching ( u8 value )

Set HV counter latching on INT2 (used for light gun)

You can ask the HV Counter to fix its value on INT2 for accurate light gun positionning.

void VDP_setPlaneSize	(	u16	w,
		u16	h,
		bool	setupVram
	)

Set background plane size (in tile).
WARNING: take attention to properly setup VRAM so tilemaps has enough space.

Parameters:

w	width in tile. Possible values are 32, 64 or 128.
h	height in tile. Possible values are 32, 64 or 128.
setupVram	If set to TRUE then tilemaps and tables will be automatically remapped in VRAM depending the plane size. If you don't know what that means then it's better to keep this value to TRUE :p Be careful to redraw your backgrounds, also the sprite engine may need to re-allocate its VRAM region if location changed.

void VDP_setPlanSize	(	u16	w,
		u16	h
	)

Deprecated:: Use VDP_setPlaneSize(..) instead.

void VDP_setReg	(	u16	reg,
		u8	value
	)

Set VDP register value.

Parameters:

reg	Register number we want to set value.
value	value to set.

void VDP_setScanMode ( u16 mode )

Sets the scan mode of the display.

Parameters:

mode	Accepted values : INTERLACED_NONE, INTERLACED_MODE1, INTERLACED_MODE2

This function changes the scanning mode on the next display blanking period.
In Interlaced Mode 1, the same pattern will be displayed on the adjacent lines of even and odd numbered fields.
In Interlaced Mode 2, different patterns can be displayed on the adjacent lines of even and odd numbered fields.
The number of cells on the screen stays the same regardless of which scanning mode is active.

void VDP_setScreenHeight224 ( )

Set vertical resolution to 224 pixels.

This is the only accepted mode for NTSC system.

void VDP_setScreenHeight240 ( )

Set vertical resolution to 240 pixels.

Only work on PAL system.

void VDP_setScrollingMode	(	u16	hscroll,
		u16	vscroll
	)

Set plane scrolling mode.

Parameters:

hscroll	Horizontal scrolling mode : HSCROLL_PLANE = Scroll offset is applied to the whole plane. HSCROLL_TILE = Scroll offset is applied on a tile basis granularity (8 pixels bloc). HSCROLL_LINE = Scroll offset is applied on a line basis granularity (1 pixel).
vscroll	Vertical scrolling mode : VSCROLL_PLANE = Scroll offset is applied to the whole plane. VSCROLL_2TILE = Scroll offset is applied on 2 tiles basis granularity (16 pixels bloc).

See also:: VDP_setHorizontalScroll() to set horizontal scroll offset in mode plane.; VDP_setHorizontalScrollTile() to set horizontal scroll offset(s) in mode tile.; VDP_setHorizontalScrollLine() to set horizontal scroll offset(s) in mode line.; VDP_setVerticalScroll() to set vertical scroll offset in mode plane.; VDP_setVerticalScrollTile() to set vertical scroll offset(s) in mode 2-tile.

void VDP_setWindowHPos	(	u16	right,
		u16	pos
	)

Sets the window Horizontal position.

Parameters:

right	If set to FALSE the window is displayed from column 0 up to column pos If set to TRUE the window is displayed from column pos up to last column
pos	The Horizontal position of the window in 2 tiles unit (16 pixels).

void VDP_setWindowPlanAddress ( u16 value )

Deprecated:: Use VDP_setWindowAddress(..) instead.

void VDP_setWindowVPos	(	u16	down,
		u16	pos
	)

Sets the window Vertical position.

Parameters:

down	If set to FALSE the window is displayed from row 0 up to row pos If set to TRUE the window is displayed from row pos up to last row
pos	The Vertical position of the window in 1 tile unit (8 pixels).

void VDP_showCPULoad ( )

Display the estimated CPU load (in %).

This function actually display an estimation of the CPU load (in %) for the last frame.

See also:: SYS_getCPULoad()

void VDP_showFPS ( u16 asFloat )

Display number of Frame Per Second.

Parameters:

asFloat Display in float number format.

This function actually display the number of time it was called in the last second.
i.e: for benchmarking you should call this method only once per frame update.

See also:: getFPS(..)

void VDP_waitDMACompletion ( )

Wait for DMA operation to complete.

Deprecated:: Use DMA_waitCompletion() instead

void VDP_waitVActive ( bool forceNext )

Wait for next vertical active area (end of vertical blank period)

Parameters:

forceNext Force waiting for next start of V-Active if we are already in V-Active period when calling the method.

The method wait until we are in Vertical active area/period.

bool VDP_waitVBlank ( bool forceNext )

Wait for next vertical blank period (same as VDP_waitVSync())

Returns:: TRUE if a frame miss was detected (more than 1 frame elapsed since last call)

Parameters:

forceNext Force waiting for next start of VBlank if we are already in VBlank period when calling the method.

The method wait until we are in Vertical blanking area/period.

bool VDP_waitVInt ( )

Wait for next Vertical Interruption.

Returns:: TRUE if a frame miss was detected (more than 1 frame elapsed since last call)

The method actually wait for the start of Vertical Interruption. It returns immediately if we are already in V-Int handler.

bool VDP_waitVSync ( )

Wait for Vertical Synchro.

Returns:: TRUE if a frame miss was detected (more than 1 frame elapsed since last call)

The method actually wait for the *next* start of Vertical blanking.

Variable Documentation

u16 planeHeight

Current background plane height (in tile)

Possible values are: 32, 64, 128

u16 planeHeightSft

Current background plane height bit shift.

Possible values are: 5, 6 or 7 (corresponding to plane height 32, 64 and 128)

u16 planeWidth

Current background plane width (in tile)

Possible values are: 32, 64, 128

u16 planeWidthSft

Current background plane width bit shift.

Possible values are: 5, 6 or 7 (corresponding to plane width 32, 64 and 128)

u16 windowWidth

Current window width (in tile)

Possible values are: 32, 64

u16 windowWidthSft

Current window width bit shift.

Possible values are: 5 or 6 (corresponding to window width 32 or 64)

Defines

Enumerations

Functions

Variables

Detailed Description

Define Documentation

Function Documentation

Variable Documentation