#include <types.h>
#include <stdint.h>
#include <gbdk/version.h>
#include <sms/hardware.h>

Data Structures
struct	joypads_t

Macros
#define	SEGA

#define	VBK_REG VDP_ATTR_SHIFT

#define	J_UP 0b00000001

#define	J_DOWN 0b00000010

#define	J_LEFT 0b00000100

#define	J_RIGHT 0b00001000

#define	J_A 0b00010000

#define	J_B 0b00100000

#define	M_TEXT_OUT 0x02U

#define	M_TEXT_INOUT 0x03U

#define	M_NO_SCROLL 0x04U

#define	M_NO_INTERP 0x08U

#define	S_FLIPX 0x02U

#define	S_FLIPY 0x04U

#define	S_PALETTE 0x08U

#define	S_PRIORITY 0x10U

#define	S_PAL(n) 0

#define	__WRITE_VDP_REG(REG, v) shadow_##REG=(v);__critical{VDP_CMD=(shadow_##REG),VDP_CMD=REG;}

#define	__READ_VDP_REG(REG) shadow_##REG

#define	EMPTY_IFLAG 0x00U

#define	VBL_IFLAG 0x01U

#define	LCD_IFLAG 0x02U

#define	TIM_IFLAG 0x04U

#define	SIO_IFLAG 0x08U

#define	JOY_IFLAG 0x10U

#define	SCREENWIDTH DEVICE_SCREEN_PX_WIDTH

#define	SCREENHEIGHT DEVICE_SCREEN_PX_HEIGHT

#define	MINWNDPOSX 0x00U

#define	MINWNDPOSY 0x00U

#define	MAXWNDPOSX 0x00U

#define	MAXWNDPOSY 0x00U

#define	DISPLAY_ON __WRITE_VDP_REG(VDP_R1, __READ_VDP_REG(VDP_R1) \|= R1_DISP_ON)

#define	DISPLAY_OFF display_off();

#define	HIDE_LEFT_COLUMN __WRITE_VDP_REG(VDP_R0, __READ_VDP_REG(VDP_R0) \|= R0_LCB)

#define	SHOW_LEFT_COLUMN __WRITE_VDP_REG(VDP_R0, __READ_VDP_REG(VDP_R0) &= (~R0_LCB))

#define	SHOW_BKG

#define	HIDE_BKG

#define	SHOW_WIN

#define	HIDE_WIN

#define	SHOW_SPRITES

#define	HIDE_SPRITES

#define	SPRITES_8x16 __WRITE_VDP_REG(VDP_R1, __READ_VDP_REG(VDP_R1) \|= R1_SPR_8X16)

#define	SPRITES_8x8 __WRITE_VDP_REG(VDP_R1, __READ_VDP_REG(VDP_R1) &= (~R1_SPR_8X16))

#define	DEVICE_SUPPORTS_COLOR (TRUE)

#define	_current_bank MAP_FRAME1

#define	CURRENT_BANK MAP_FRAME1

#define	BANK(VARNAME) ( (uint8_t) & __bank_ ## VARNAME )

#define	BANKREF(VARNAME)

#define	BANKREF_EXTERN(VARNAME) extern const void __bank_ ## VARNAME;

#define	SWITCH_ROM(b) MAP_FRAME1=(b)

#define	SWITCH_ROM1 SWITCH_ROM

#define	SWITCH_ROM2(b) MAP_FRAME2=(b)

#define	SWITCH_RAM(b) RAM_CONTROL=((b)&1)?RAM_CONTROL\|RAMCTL_BANK:RAM_CONTROL&(~RAMCTL_BANK)

#define	ENABLE_RAM RAM_CONTROL\|=RAMCTL_RAM

#define	DISABLE_RAM RAM_CONTROL&=(~RAMCTL_RAM)

#define	set_bkg_palette_entry set_palette_entry

#define	set_sprite_palette_entry(palette, entry, rgb_data) set_palette_entry(1,entry,rgb_data)

#define	set_bkg_palette set_palette

#define	set_sprite_palette(first_palette, nb_palettes, rgb_data) set_palette(1,1,rgb_data)

#define	COMPAT_PALETTE(C0, C1, C2, C3) (((uint16_t)(C3) << 12) \| ((uint16_t)(C2) << 8) \| ((uint16_t)(C1) << 4) \| (uint16_t)(C0))

#define	set_bkg_tiles set_tile_map_compat

#define	set_win_tiles set_tile_map_compat

#define	fill_bkg_rect fill_rect_compat

#define	fill_win_rect fill_rect_compat

#define	DISABLE_VBL_TRANSFER _shadow_OAM_base = 0

#define	ENABLE_VBL_TRANSFER _shadow_OAM_base = (uint8_t)((uint16_t)&shadow_OAM >> 8)

#define	MAX_HARDWARE_SPRITES 64

#define	HARDWARE_SPRITE_CAN_FLIP_X 0

#define	HARDWARE_SPRITE_CAN_FLIP_Y 0

#define	set_bkg_tile_xy set_tile_xy

#define	set_win_tile_xy set_tile_xy

#define	get_win_xy_addr get_bkg_xy_addr

Typedefs
typedef void(*	int_handler) (void) NONBANKED

Functions
void	WRITE_VDP_CMD (uint16_t cmd) Z88DK_FASTCALL PRESERVES_REGS(b

void	WRITE_VDP_DATA (uint16_t data) Z88DK_FASTCALL PRESERVES_REGS(b

void	mode (uint8_t m) OLDCALL

uint8_t	get_mode (void) OLDCALL

void	set_interrupts (uint8_t flags) Z88DK_FASTCALL

void	remove_VBL (int_handler h) Z88DK_FASTCALL PRESERVES_REGS(iyh

void	remove_LCD (int_handler h) Z88DK_FASTCALL PRESERVES_REGS(b

void	remove_TIM (int_handler h) Z88DK_FASTCALL

void	remove_SIO (int_handler h) Z88DK_FASTCALL

void	remove_JOY (int_handler h) Z88DK_FASTCALL

void	add_VBL (int_handler h) Z88DK_FASTCALL PRESERVES_REGS(d

void	add_LCD (int_handler h) Z88DK_FASTCALL PRESERVES_REGS(b

void	add_TIM (int_handler h) Z88DK_FASTCALL

void	add_SIO (int_handler h) Z88DK_FASTCALL

void	add_JOY (int_handler h) Z88DK_FASTCALL

uint8_t	cancel_pending_interrupts (void)

void	move_bkg (uint8_t x, uint8_t y)

void	scroll_bkg (int8_t x, int8_t y)

void	vsync (void) PRESERVES_REGS(b

void	wait_vbl_done (void) PRESERVES_REGS(b

void	display_off (void)

void	refresh_OAM (void)

void	delay (uint16_t d) Z88DK_FASTCALL

uint8_t	joypad (void) OLDCALL PRESERVES_REGS(b

uint8_t	waitpad (uint8_t mask) Z88DK_FASTCALL PRESERVES_REGS(b

void	waitpadup (void) PRESERVES_REGS(b

uint8_t	joypad_init (uint8_t npads, joypads_t *joypads) Z88DK_CALLEE

void	joypad_ex (joypads_t *joypads) Z88DK_FASTCALL PRESERVES_REGS(iyh

void	set_default_palette (void)

void	cgb_compatibility (void)

void	cpu_fast (void)

void	set_palette_entry (uint8_t palette, uint8_t entry, uint16_t rgb_data) Z88DK_CALLEE PRESERVES_REGS(iyh

void	set_palette (uint8_t first_palette, uint8_t nb_palettes, palette_color_t *rgb_data) Z88DK_CALLEE

void	set_native_tile_data (uint16_t start, uint16_t ntiles, const void *src) Z88DK_CALLEE PRESERVES_REGS(iyh

void	set_bkg_4bpp_data (uint16_t start, uint16_t ntiles, const void *src)

void	set_sprite_4bpp_data (uint16_t start, uint16_t ntiles, const void *src)

void	set_2bpp_palette (uint16_t palette)

void	set_tile_2bpp_data (uint16_t start, uint16_t ntiles, const void *src, uint16_t palette) Z88DK_CALLEE PRESERVES_REGS(iyh

void	set_bkg_data (uint16_t start, uint16_t ntiles, const void *src)

void	set_sprite_data (uint16_t start, uint16_t ntiles, const void *src)

void	set_bkg_2bpp_data (uint16_t start, uint16_t ntiles, const void *src)

void	set_sprite_2bpp_data (uint16_t start, uint16_t ntiles, const void *src)

void	set_1bpp_colors (uint8_t fgcolor, uint8_t bgcolor)

void	set_tile_1bpp_data (uint16_t start, uint16_t ntiles, const void *src, uint16_t colors) Z88DK_CALLEE PRESERVES_REGS(iyh

void	set_bkg_1bpp_data (uint16_t start, uint16_t ntiles, const void *src)

void	set_sprite_1bpp_data (uint16_t start, uint16_t ntiles, const void *src)

void	set_data (uint16_t dst, const void *src, uint16_t size) Z88DK_CALLEE PRESERVES_REGS(iyh

void	vmemcpy (uint16_t dst, const void *src, uint16_t size) Z88DK_CALLEE PRESERVES_REGS(iyh

void	set_tile_map (uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint8_t *tiles) Z88DK_CALLEE PRESERVES_REGS(iyh

void	set_tile_map_compat (uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint8_t *tiles) Z88DK_CALLEE PRESERVES_REGS(iyh

void	set_bkg_based_tiles (uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint8_t *tiles, uint8_t base_tile)

void	set_win_based_tiles (uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint8_t *tiles, uint8_t base_tile)

void	set_bkg_attributes (uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint8_t *tiles)

void	set_tile_submap (uint8_t x, uint8_t y, uint8_t w, uint8_t h, uint8_t map_w, const uint8_t *map) Z88DK_CALLEE PRESERVES_REGS(iyh

void	set_tile_submap_compat (uint8_t x, uint8_t y, uint8_t w, uint8_t h, uint8_t map_w, const uint8_t *map) Z88DK_CALLEE PRESERVES_REGS(iyh

void	set_bkg_submap (uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint8_t *map, uint8_t map_w)

void	set_win_submap (uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint8_t *map, uint8_t map_w)

void	set_bkg_based_submap (uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint8_t *map, uint8_t map_w, uint8_t base_tile)

void	set_win_based_submap (uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint8_t *map, uint8_t map_w, uint8_t base_tile)

void	set_bkg_submap_attributes (uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint8_t *map, uint8_t map_w)

void	fill_rect (uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint16_t tile) Z88DK_CALLEE PRESERVES_REGS(iyh

void	fill_rect_compat (uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint16_t tile) Z88DK_CALLEE PRESERVES_REGS(iyh

void	SET_SHADOW_OAM_ADDRESS (void *address)

void	set_sprite_tile (uint8_t nb, uint8_t tile)

uint8_t	get_sprite_tile (uint8_t nb)

void	set_sprite_prop (uint8_t nb, uint8_t prop)

uint8_t	get_sprite_prop (uint8_t nb)

void	move_sprite (uint8_t nb, uint8_t x, uint8_t y)

void	scroll_sprite (uint8_t nb, int8_t x, int8_t y)

void	hide_sprite (uint8_t nb)

void	set_vram_byte (uint8_t *addr, uint8_t v) Z88DK_CALLEE PRESERVES_REGS(iyh

uint8_t *	set_attributed_tile_xy (uint8_t x, uint8_t y, uint16_t t) Z88DK_CALLEE PRESERVES_REGS(iyh

uint8_t *	set_tile_xy (uint8_t x, uint8_t y, uint8_t t) Z88DK_CALLEE PRESERVES_REGS(iyh

uint8_t *	get_bkg_xy_addr (uint8_t x, uint8_t y) Z88DK_CALLEE PRESERVES_REGS(iyh

Variables
void	c

void	d

void	e

void	iyh

void	iyl

void	h

void	l

volatile uint16_t	sys_time

uint16_t	_current_2bpp_palette

uint16_t	_current_1bpp_colors

uint8_t	_map_tile_offset

uint8_t	_submap_tile_offset

volatile uint8_t	shadow_OAM []

volatile uint8_t	_shadow_OAM_base

volatile uint8_t	_shadow_OAM_OFF

Detailed Description

SMS/GG specific functions.

Macro Definition Documentation

◆ SEGA

#define SEGA

◆ VBK_REG

#define VBK_REG VDP_ATTR_SHIFT

◆ J_UP

#define J_UP 0b00000001

Joypad bits. A logical OR of these is used in the wait_pad and joypad functions. For example, to see if the B button is pressed try

uint8_t keys; keys = joypad(); if (keys & J_B) { ... }

See also: joypad

◆ J_DOWN

#define J_DOWN 0b00000010

◆ J_LEFT

#define J_LEFT 0b00000100

◆ J_RIGHT

#define J_RIGHT 0b00001000

◆ J_A

#define J_A 0b00010000

◆ J_B

#define J_B 0b00100000

◆ M_TEXT_OUT

#define M_TEXT_OUT 0x02U

Screen modes. Normally used by internal functions only.

See also: mode()

◆ M_TEXT_INOUT

#define M_TEXT_INOUT 0x03U

◆ M_NO_SCROLL

#define M_NO_SCROLL 0x04U

Set this in addition to the others to disable scrolling

If scrolling is disabled, the cursor returns to (0,0)

See also: mode()

◆ M_NO_INTERP

#define M_NO_INTERP 0x08U

Set this to disable interpretation

See also: mode()

◆ S_FLIPX

#define S_FLIPX 0x02U

If set the background tile will be flipped horizontally.

◆ S_FLIPY

#define S_FLIPY 0x04U

If set the background tile will be flipped vertically.

◆ S_PALETTE

#define S_PALETTE 0x08U

If set the background tile palette.

◆ S_PRIORITY

#define S_PRIORITY 0x10U

If set the background tile priority.

◆ S_PAL

#define S_PAL ( n ) 0

Dummy function used by other platforms. Required for the png2asset tool's metasprite output.

◆ __WRITE_VDP_REG

#define __WRITE_VDP_REG	(	REG,
		v
	)	shadow_##REG=(v);__critical{VDP_CMD=(shadow_##REG),VDP_CMD=REG;}

◆ __READ_VDP_REG

#define __READ_VDP_REG ( REG ) shadow_##REG

◆ EMPTY_IFLAG

#define EMPTY_IFLAG 0x00U

Disable calling of interrupt service routines

◆ VBL_IFLAG

#define VBL_IFLAG 0x01U

VBlank Interrupt occurs at the start of the vertical blank.

During this period the video ram may be freely accessed.

See also: set_interrupts(),; add_VBL

◆ LCD_IFLAG

#define LCD_IFLAG 0x02U

LCD Interrupt when triggered by the STAT register.

See also: set_interrupts(),; add_LCD

◆ TIM_IFLAG

#define TIM_IFLAG 0x04U

Does nothing on SMS/GG

◆ SIO_IFLAG

#define SIO_IFLAG 0x08U

Does nothing on SMS/GG

◆ JOY_IFLAG

#define JOY_IFLAG 0x10U

Does nothing on SMS/GG

◆ SCREENWIDTH

#define SCREENWIDTH DEVICE_SCREEN_PX_WIDTH

Width of the visible screen in pixels.

◆ SCREENHEIGHT

#define SCREENHEIGHT DEVICE_SCREEN_PX_HEIGHT

Height of the visible screen in pixels.

◆ MINWNDPOSX

#define MINWNDPOSX 0x00U

The Minimum X position of the Window Layer (Left edge of screen)

See also: move_win()

◆ MINWNDPOSY

#define MINWNDPOSY 0x00U

The Minimum Y position of the Window Layer (Top edge of screen)

See also: move_win()

◆ MAXWNDPOSX

#define MAXWNDPOSX 0x00U

The Maximum X position of the Window Layer (Right edge of screen)

See also: move_win()

◆ MAXWNDPOSY

#define MAXWNDPOSY 0x00U

The Maximum Y position of the Window Layer (Bottom edge of screen)

See also: move_win()

◆ DISPLAY_ON

#define DISPLAY_ON __WRITE_VDP_REG(VDP_R1, __READ_VDP_REG(VDP_R1) |= R1_DISP_ON)

Turns the display back on.

See also: display_off, DISPLAY_OFF

◆ DISPLAY_OFF

#define DISPLAY_OFF display_off();

Turns the display off immediately.

See also: display_off, DISPLAY_ON

◆ HIDE_LEFT_COLUMN

#define HIDE_LEFT_COLUMN __WRITE_VDP_REG(VDP_R0, __READ_VDP_REG(VDP_R0) |= R0_LCB)

Blanks leftmost column, so it is not garbaged when you use horizontal scroll

See also: SHOW_LEFT_COLUMN

◆ SHOW_LEFT_COLUMN

#define SHOW_LEFT_COLUMN __WRITE_VDP_REG(VDP_R0, __READ_VDP_REG(VDP_R0) &= (~R0_LCB))

Shows leftmost column

See also: HIDE_LEFT_COLUMN

◆ SHOW_BKG

#define SHOW_BKG

Turns on the background layer. Not yet implemented

◆ HIDE_BKG

#define HIDE_BKG

Turns off the background layer. Not yet implemented

◆ SHOW_WIN

#define SHOW_WIN

Turns on the window layer Not yet implemented

◆ HIDE_WIN

#define HIDE_WIN

Turns off the window layer. Not yet implemented

◆ SHOW_SPRITES

#define SHOW_SPRITES

Turns on the sprites layer. Not yet implemented

◆ HIDE_SPRITES

#define HIDE_SPRITES

Turns off the sprites layer. Not yet implemented

◆ SPRITES_8x16

#define SPRITES_8x16 __WRITE_VDP_REG(VDP_R1, __READ_VDP_REG(VDP_R1) |= R1_SPR_8X16)

Sets sprite size to 8x16 pixels, two tiles one above the other.

◆ SPRITES_8x8

#define SPRITES_8x8 __WRITE_VDP_REG(VDP_R1, __READ_VDP_REG(VDP_R1) &= (~R1_SPR_8X16))

Sets sprite size to 8x8 pixels, one tile.

◆ DEVICE_SUPPORTS_COLOR

#define DEVICE_SUPPORTS_COLOR (TRUE)

Macro returns TRUE if device supports color (it always does on SMS/GG)

◆ _current_bank

#define _current_bank MAP_FRAME1

Tracks current active ROM bank in frame 1

◆ CURRENT_BANK

#define CURRENT_BANK MAP_FRAME1

◆ BANK

#define BANK ( VARNAME ) ( (uint8_t) & __bank_ ## VARNAME )

Obtains the bank number of VARNAME

Parameters

VARNAME Name of the variable which has a __bank_VARNAME companion symbol which is adjusted by bankpack

Use this to obtain the bank number from a bank reference created with BANKREF().

See also: BANKREF_EXTERN(), BANKREF()

◆ BANKREF

#define BANKREF ( VARNAME )

Value:

void __func_ ## VARNAME(void) __banked __naked { \
__asm \
    .local b___func_ ## VARNAME \
    ___bank_ ## VARNAME = b___func_ ## VARNAME \
    .globl ___bank_ ## VARNAME \
__endasm; \
}

Creates a reference for retrieving the bank number of a variable or function

Parameters

VARNAME Variable name to use, which may be an existing identifier

See also: BANK() for obtaining the bank number of the included data.

More than one BANKREF() may be created per file, but each call should always use a unique VARNAME.

Use BANKREF_EXTERN() within another source file to make the variable and it's data accesible there.

◆ BANKREF_EXTERN

#define BANKREF_EXTERN ( VARNAME ) extern const void __bank_ ## VARNAME;

Creates extern references for accessing a BANKREF() generated variable.

Parameters

VARNAME Name of the variable used with BANKREF()

This makes a BANKREF() reference in another source file accessible in the current file for use with BANK().

See also: BANKREF(), BANK()

◆ SWITCH_ROM

#define SWITCH_ROM ( b ) MAP_FRAME1=(b)

Makes switch the active ROM bank in frame 1

Parameters

b	ROM bank to switch to

◆ SWITCH_ROM1

#define SWITCH_ROM1 SWITCH_ROM

◆ SWITCH_ROM2

#define SWITCH_ROM2 ( b ) MAP_FRAME2=(b)

Makes switch the active ROM bank in frame 2

Parameters

b	ROM bank to switch to

◆ SWITCH_RAM

#define SWITCH_RAM ( b ) RAM_CONTROL=((b)&1)?RAM_CONTROL|RAMCTL_BANK:RAM_CONTROL&(~RAMCTL_BANK)

Switches RAM bank

Parameters

b	SRAM bank to switch to

◆ ENABLE_RAM

#define ENABLE_RAM RAM_CONTROL|=RAMCTL_RAM

Enables RAM

◆ DISABLE_RAM

#define DISABLE_RAM RAM_CONTROL&=(~RAMCTL_RAM)

Disables RAM

◆ set_bkg_palette_entry

#define set_bkg_palette_entry set_palette_entry

◆ set_sprite_palette_entry

#define set_sprite_palette_entry	(	palette,
		entry,
		rgb_data
	)	set_palette_entry(1,entry,rgb_data)

◆ set_bkg_palette

#define set_bkg_palette set_palette

◆ set_sprite_palette

#define set_sprite_palette	(	first_palette,
		nb_palettes,
		rgb_data
	)	set_palette(1,1,rgb_data)

◆ COMPAT_PALETTE

#define COMPAT_PALETTE	(	C0,
		C1,
		C2,
		C3
	)	(((uint16_t)(C3) << 12) \| ((uint16_t)(C2) << 8) \| ((uint16_t)(C1) << 4) \| (uint16_t)(C0))

◆ set_bkg_tiles

#define set_bkg_tiles set_tile_map_compat

◆ set_win_tiles

#define set_win_tiles set_tile_map_compat

◆ fill_bkg_rect

#define fill_bkg_rect fill_rect_compat

◆ fill_win_rect

#define fill_win_rect fill_rect_compat

◆ DISABLE_VBL_TRANSFER

#define DISABLE_VBL_TRANSFER _shadow_OAM_base = 0

Disable shadow OAM to VRAM copy on each VBlank

◆ ENABLE_VBL_TRANSFER

#define ENABLE_VBL_TRANSFER _shadow_OAM_base = (uint8_t)((uint16_t)&shadow_OAM >> 8)

Enable shadow OAM to VRAM copy on each VBlank

◆ MAX_HARDWARE_SPRITES

#define MAX_HARDWARE_SPRITES 64

Amount of hardware sprites in OAM

◆ HARDWARE_SPRITE_CAN_FLIP_X

#define HARDWARE_SPRITE_CAN_FLIP_X 0

True if sprite hardware can flip sprites by X

◆ HARDWARE_SPRITE_CAN_FLIP_Y

#define HARDWARE_SPRITE_CAN_FLIP_Y 0

True if sprite hardware can flip sprites by Y

◆ set_bkg_tile_xy

#define set_bkg_tile_xy set_tile_xy

◆ set_win_tile_xy

#define set_win_tile_xy set_tile_xy

◆ get_win_xy_addr

#define get_win_xy_addr get_bkg_xy_addr

Typedef Documentation

◆ int_handler

typedef void(* int_handler) (void) NONBANKED

Interrupt handlers

Function Documentation

◆ WRITE_VDP_CMD()

void WRITE_VDP_CMD ( uint16_t cmd )

◆ WRITE_VDP_DATA()

void WRITE_VDP_DATA ( uint16_t data )

◆ mode()

void mode ( uint8_t m )

Set the current screen mode - one of M_* modes

Normally used by internal functions only.

See also: M_TEXT_OUT, M_TEXT_INOUT, M_NO_SCROLL, M_NO_INTERP

◆ get_mode()

uint8_t get_mode ( void )

Returns the current mode

See also: M_TEXT_OUT, M_TEXT_INOUT, M_NO_SCROLL, M_NO_INTERP

Returns the current mode

See also: M_DRAWING, M_TEXT_OUT, M_TEXT_INOUT, M_NO_SCROLL, M_NO_INTERP

◆ set_interrupts()

void set_interrupts ( uint8_t flags )

Clears any pending interrupts and sets the interrupt mask register IO to flags.

Parameters

flags A logical OR of *_IFLAGS

Note: : This disables and then re-enables interrupts so it must be used outside of a critical section.

See also: enable_interrupts(), disable_interrupts(); VBL_IFLAG, LCD_IFLAG, TIM_IFLAG, SIO_IFLAG, JOY_IFLAG

◆ remove_VBL()

void remove_VBL ( int_handler h )

Removes the VBL interrupt handler.

See also: add_VBL()

◆ remove_LCD()

void remove_LCD ( int_handler h )

Removes the LCD interrupt handler.

See also: add_LCD(), remove_VBL()

◆ remove_TIM()

void remove_TIM ( int_handler h )

◆ remove_SIO()

void remove_SIO ( int_handler h )

◆ remove_JOY()

void remove_JOY ( int_handler h )

◆ add_VBL()

void add_VBL ( int_handler h )

Adds a V-blank interrupt handler.

◆ add_LCD()

void add_LCD ( int_handler h )

Adds a LCD interrupt handler.

◆ add_TIM()

void add_TIM ( int_handler h )

Does nothing on SMS/GG

◆ add_SIO()

void add_SIO ( int_handler h )

Does nothing on SMS/GG

◆ add_JOY()

void add_JOY ( int_handler h )

Does nothing on SMS/GG

◆ cancel_pending_interrupts()

uint8_t cancel_pending_interrupts ( void )

inline

Cancel pending interrupts

◆ move_bkg()

void move_bkg	(	uint8_t	x,
		uint8_t	y
	)

inline

◆ scroll_bkg()

void scroll_bkg	(	int8_t	x,
		int8_t	y
	)

inline

◆ vsync()

void vsync ( void )

HALTs the CPU and waits for the vertical blank interrupt.

This is often used in main loops to idle the CPU at low power until it's time to start the next frame. It's also useful for syncing animation with the screen re-draw.

Warning: If the VBL interrupt is disabled, this function will never return. If the screen is off this function returns immediately.

◆ wait_vbl_done()

void wait_vbl_done ( void )

Obsolete. This function has been replaced by vsync(), which has identical behavior.

◆ display_off()

void display_off ( void )

inline

Turns the display off.

See also: DISPLAY_ON

◆ refresh_OAM()

void refresh_OAM ( void )

Copies data from shadow OAM to OAM

◆ delay()

void delay ( uint16_t d )

Delays the given number of milliseconds. Uses no timers or interrupts, and can be called with interrupts disabled

◆ joypad()

uint8_t joypad ( void )

Reads and returns the current state of the joypad.

◆ waitpad()

uint8_t waitpad ( uint8_t mask )

Waits until at least one of the buttons given in mask are pressed.

◆ waitpadup()

void waitpadup ( void )

Waits for the directional pad and all buttons to be released.

Note: Checks in a loop that doesn't HALT at all, so the CPU will be maxed out until this call returns.

◆ joypad_init()

uint8_t joypad_init	(	uint8_t	npads,
		joypads_t *	joypads
	)

Initializes joypads_t structure for polling multiple joypads

Parameters

npads	number of joypads requested (1, 2 or 4)
joypads	pointer to joypads_t structure to be initialized

Only required for joypad_ex, not required for calls to regular joypad()

Returns: number of joypads avaliable

See also: joypad_ex(), joypads_t

◆ joypad_ex()

void joypad_ex ( joypads_t * joypads )

Polls all avaliable joypads

Parameters

joypads pointer to joypads_t structure to be filled with joypad statuses, must be previously initialized with joypad_init()

See also: joypad_init(), joypads_t

◆ set_default_palette()

void set_default_palette ( void )

◆ cgb_compatibility()

void cgb_compatibility ( void )

inline

Obsolete. This function has been replaced by set_default_palette(), which has identical behavior.

◆ cpu_fast()

void cpu_fast ( void )

inline

Set CPU speed to fast (CGB Double Speed) operation.

On startup the CGB operates in Normal Speed Mode and can be switched into Double speed mode (faster processing but also higher power consumption). See the Pan Docs for more information about which hardware features operate faster and which remain at Normal Speed.

Interrupts are temporarily disabled and then re-enabled during this call.
You can check to see if _cpu == CGB_TYPE before using this function.

See also: cpu_slow(), _cpu

◆ set_palette_entry()

void set_palette_entry	(	uint8_t	palette,
		uint8_t	entry,
		uint16_t	rgb_data
	)

◆ set_palette()

void set_palette	(	uint8_t	first_palette,
		uint8_t	nb_palettes,
		palette_color_t *	rgb_data
	)

◆ set_native_tile_data()

void set_native_tile_data	(	uint16_t	start,
		uint16_t	ntiles,
		const void *	src
	)

◆ set_bkg_4bpp_data()

void set_bkg_4bpp_data	(	uint16_t	start,
		uint16_t	ntiles,
		const void *	src
	)

inline

◆ set_sprite_4bpp_data()

void set_sprite_4bpp_data	(	uint16_t	start,
		uint16_t	ntiles,
		const void *	src
	)

inline

◆ set_2bpp_palette()

void set_2bpp_palette ( uint16_t palette )

inline

◆ set_tile_2bpp_data()

void set_tile_2bpp_data	(	uint16_t	start,
		uint16_t	ntiles,
		const void *	src,
		uint16_t	palette
	)

◆ set_bkg_data()

void set_bkg_data	(	uint16_t	start,
		uint16_t	ntiles,
		const void *	src
	)

inline

◆ set_sprite_data()

void set_sprite_data	(	uint16_t	start,
		uint16_t	ntiles,
		const void *	src
	)

inline

◆ set_bkg_2bpp_data()

void set_bkg_2bpp_data	(	uint16_t	start,
		uint16_t	ntiles,
		const void *	src
	)

inline

◆ set_sprite_2bpp_data()

void set_sprite_2bpp_data	(	uint16_t	start,
		uint16_t	ntiles,
		const void *	src
	)

inline

◆ set_1bpp_colors()

void set_1bpp_colors	(	uint8_t	fgcolor,
		uint8_t	bgcolor
	)

inline

◆ set_tile_1bpp_data()

void set_tile_1bpp_data	(	uint16_t	start,
		uint16_t	ntiles,
		const void *	src,
		uint16_t	colors
	)

◆ set_bkg_1bpp_data()

void set_bkg_1bpp_data	(	uint16_t	start,
		uint16_t	ntiles,
		const void *	src
	)

inline

◆ set_sprite_1bpp_data()

void set_sprite_1bpp_data	(	uint16_t	start,
		uint16_t	ntiles,
		const void *	src
	)

inline

◆ set_data()

void set_data	(	uint16_t	dst,
		const void *	src,
		uint16_t	size
	)

Copies arbitrary data to an address in VRAM

Parameters

dst	destination VRAM Address
src	Pointer to source buffer
size	Number of bytes to copy

Copies size bytes from a buffer at _src__ to VRAM starting at dst.

◆ vmemcpy()

void vmemcpy	(	uint16_t	dst,
		const void *	src,
		uint16_t	size
	)

◆ set_tile_map()

void set_tile_map	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		const uint8_t *	tiles
	)

◆ set_tile_map_compat()

void set_tile_map_compat	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		const uint8_t *	tiles
	)

◆ set_bkg_based_tiles()

void set_bkg_based_tiles	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		const uint8_t *	tiles,
		uint8_t	base_tile
	)

inline

◆ set_win_based_tiles()

void set_win_based_tiles	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		const uint8_t *	tiles,
		uint8_t	base_tile
	)

inline

◆ set_bkg_attributes()

void set_bkg_attributes	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		const uint8_t *	tiles
	)

inline

◆ set_tile_submap()

void set_tile_submap	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		uint8_t	map_w,
		const uint8_t *	map
	)

◆ set_tile_submap_compat()

void set_tile_submap_compat	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		uint8_t	map_w,
		const uint8_t *	map
	)

◆ set_bkg_submap()

void set_bkg_submap	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		const uint8_t *	map,
		uint8_t	map_w
	)

inline

Sets a rectangular area of the Background Tile Map using a sub-region from a source tile map. Useful for scrolling implementations of maps larger than 32 x 32 tiles.

Parameters

x	X Start position in both the Source Tile Map and hardware Background Map tile coordinates. Range 0 - 255
y	Y Start position in both the Source Tile Map and hardware Background Map tile coordinates. Range 0 - 255
w	Width of area to set in tiles. Range 1 - 255
h	Height of area to set in tiles. Range 1 - 255
map	Pointer to source tile map data
map_w	Width of source tile map in tiles. Range 1 - 255

Entries are copied from map to the Background Tile Map starting at x, y writing across for w tiles and down for h tiles, using map_w as the rowstride for the source tile map.

The x and y parameters are in Source Tile Map tile coordinates. The location tiles will be written to on the hardware Background Map is derived from those, but only uses the lower 5 bits of each axis, for range of 0-31 (they are bit-masked: x & 0x1F and y & 0x1F). As a result the two coordinate systems are aligned together.

In order to transfer tile map data in a way where the coordinate systems are not aligned, an offset from the Source Tile Map pointer can be passed in: (map_ptr + x + (y * map_width)).

For example, if you want the tile id at 1,2 from the source map to show up at 0,0 on the hardware Background Map (instead of at 1,2) then modify the pointer address that is passed in: map_ptr + 1 + (2 * map_width)

Use this instead of set_bkg_tiles when the source map is wider than 32 tiles or when writing a width that does not match the source map width.

One byte per source tile map entry.

Writes that exceed coordinate 31 on the x or y axis will wrap around to the Left and Top edges.

See set_bkg_tiles for setting CGB attribute maps with VBK_REG.

See also: SHOW_BKG; set_bkg_data, set_bkg_tiles, set_win_submap, set_tiles

◆ set_win_submap()

void set_win_submap	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		const uint8_t *	map,
		uint8_t	map_w
	)

inline

Sets a rectangular area of the Window Tile Map using a sub-region from a source tile map.

Parameters

x	X Start position in both the Source Tile Map and hardware Window Map tile coordinates. Range 0 - 255
y	Y Start position in both the Source Tile Map and hardware Window Map tile coordinates. Range 0 - 255
w	Width of area to set in tiles. Range 1 - 255
h	Height of area to set in tiles. Range 1 - 255
map	Pointer to source tile map data
map_w	Width of source tile map in tiles. Range 1 - 255

Entries are copied from map to the Window Tile Map starting at x, y writing across for w tiles and down for h tiles, using map_w as the rowstride for the source tile map.

The x and y parameters are in Source Tile Map tile coordinates. The location tiles will be written to on the hardware Background Map is derived from those, but only uses the lower 5 bits of each axis, for range of 0-31 (they are bit-masked: x & 0x1F and y & 0x1F). As a result the two coordinate systems are aligned together.

In order to transfer tile map data in a way where the coordinate systems are not aligned, an offset from the Source Tile Map pointer can be passed in: (map_ptr + x + (y * map_width)).

For example, if you want the tile id at 1,2 from the source map to show up at 0,0 on the hardware Background Map (instead of at 1,2) then modify the pointer address that is passed in: map_ptr + 1 + (2 * map_width)

Use this instead of set_win_tiles when the source map is wider than 32 tiles or when writing a width that does not match the source map width.

One byte per source tile map entry.

Writes that exceed coordinate 31 on the x or y axis will wrap around to the Left and Top edges.

GBC only: VBK_REG determines whether Tile Numbers or Tile Attributes get set.

VBK_REG = VBK_TILES Tile Numbers are written
VBK_REG = VBK_ATTRIBUTES Tile Attributes are written

See set_bkg_tiles for details about CGB attribute maps with VBK_REG.

See also: SHOW_WIN, HIDE_WIN, set_win_tiles, set_bkg_submap, set_bkg_tiles, set_bkg_data, set_tiles

◆ set_bkg_based_submap()

void set_bkg_based_submap	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		const uint8_t *	map,
		uint8_t	map_w,
		uint8_t	base_tile
	)

inline

◆ set_win_based_submap()

void set_win_based_submap	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		const uint8_t *	map,
		uint8_t	map_w,
		uint8_t	base_tile
	)

inline

◆ set_bkg_submap_attributes()

void set_bkg_submap_attributes	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		const uint8_t *	map,
		uint8_t	map_w
	)

inline

◆ fill_rect()

void fill_rect	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		const uint16_t	tile
	)

◆ fill_rect_compat()

void fill_rect_compat	(	uint8_t	x,
		uint8_t	y,
		uint8_t	w,
		uint8_t	h,
		const uint16_t	tile
	)

◆ SET_SHADOW_OAM_ADDRESS()

void SET_SHADOW_OAM_ADDRESS ( void * address )

inline

Sets address of 256-byte aligned array of shadow OAM to be transferred on each VBlank

◆ set_sprite_tile()

void set_sprite_tile	(	uint8_t	nb,
		uint8_t	tile
	)

inline

Sets sprite number nb__in the OAM to display tile number __tile.

Parameters

nb	Sprite number, range 0 - 39
tile	Selects a tile (0 - 255) from memory at 8000h - 8FFFh In CGB Mode this could be either in VRAM Bank 0 or 1, depending on Bit 3 of the OAM Attribute Flag (see set_sprite_prop)

In 8x16 mode:

The sprite will also display the next tile (tile + 1) directly below (y + 8) the first tile.
The lower bit of the tile number is ignored: the upper 8x8 tile is (tile & 0xFE), and the lower 8x8 tile is (tile | 0x01).
See: SPRITES_8x16

◆ get_sprite_tile()

uint8_t get_sprite_tile ( uint8_t nb )

inline

Returns the tile number of sprite number nb in the OAM.

Parameters

nb	Sprite number, range 0 - 39

See also: set_sprite_tile for more details

◆ set_sprite_prop()

void set_sprite_prop	(	uint8_t	nb,
		uint8_t	prop
	)

inline

◆ get_sprite_prop()

uint8_t get_sprite_prop ( uint8_t nb )

inline

◆ move_sprite()

void move_sprite	(	uint8_t	nb,
		uint8_t	x,
		uint8_t	y
	)

inline

Moves sprite number nb to the x, y position on the screen.

Parameters

nb	Sprite number, range 0 - 39
x	X Position. Specifies the sprites horizontal position on the screen (minus 8). An offscreen value (X=0 or X>=168) hides the sprite, but the sprite still affects the priority ordering - a better way to hide a sprite is to set its Y-coordinate offscreen.
y	Y Position. Specifies the sprites vertical position on the screen (minus 16). An offscreen value (for example, Y=0 or Y>=160) hides the sprite.

Moving the sprite to 0,0 (or similar off-screen location) will hide it.

◆ scroll_sprite()

void scroll_sprite	(	uint8_t	nb,
		int8_t	x,
		int8_t	y
	)

inline

Moves sprite number nb relative to its current position.

Parameters

nb	Sprite number, range 0 - 39
x	Number of pixels to move the sprite on the X axis Range: -128 - 127
y	Number of pixels to move the sprite on the Y axis Range: -128 - 127

See also: move_sprite for more details about the X and Y position

◆ hide_sprite()

void hide_sprite ( uint8_t nb )

inline

Hides sprite number nb by moving it to zero position by Y.

Parameters

nb	Sprite number, range 0 - 39

◆ set_vram_byte()

void set_vram_byte	(	uint8_t *	addr,
		uint8_t	v
	)

Set byte in vram at given memory location

Parameters

addr	address to write to
v	value

◆ set_attributed_tile_xy()

uint8_t* set_attributed_tile_xy	(	uint8_t	x,
		uint8_t	y,
		uint16_t	t
	)

Set single tile t with attributes on background layer at x,y

Parameters

x	X-coordinate
y	Y-coordinate
t	tile index

Returns: returns the address of tile, so you may use faster set_vram_byte() later

◆ set_tile_xy()

uint8_t* set_tile_xy	(	uint8_t	x,
		uint8_t	y,
		uint8_t	t
	)

Set single tile t on background layer at x,y

Parameters

x	X-coordinate
y	Y-coordinate
t	tile index

Returns: returns the address of tile, so you may use faster set_vram_byte() later

◆ get_bkg_xy_addr()

uint8_t* get_bkg_xy_addr	(	uint8_t	x,
		uint8_t	y
	)

Get address of X,Y tile of background map

Variable Documentation

◆ c

void c

◆ d

void d

◆ e

void e

◆ iyh

void iyh

◆ iyl

uint8_t iyl

◆ h

uint8_t h

◆ l

void l

◆ sys_time

volatile uint16_t sys_time

extern

Global Time Counter in VBL periods (60Hz)

Increments once per Frame

Will wrap around every ~18 minutes (unsigned 16 bits = 65535 / 60 / 60 = 18.2)

◆ _current_2bpp_palette

uint16_t _current_2bpp_palette

extern

◆ _current_1bpp_colors

uint16_t _current_1bpp_colors

extern

◆ _map_tile_offset

uint8_t _map_tile_offset

extern

◆ _submap_tile_offset

uint8_t _submap_tile_offset

extern

◆ shadow_OAM

volatile uint8_t shadow_OAM[]

extern

Shadow OAM array in WRAM, that is transferred into the real OAM each VBlank

◆ _shadow_OAM_base

volatile uint8_t _shadow_OAM_base

extern

MSB of shadow_OAM address is used by OAM copying routine

MSB of shadow_OAM address is used by OAM DMA copying routine

◆ _shadow_OAM_OFF

volatile uint8_t _shadow_OAM_OFF

extern

Flag for disabling of OAM copying routine

Values:

1: OAM copy routine is disabled (non-isr VDP operation may be in progress)
0: OAM copy routine is enabled

This flag is modified by all sms/gg GBDK API calls that write to the VDP. It is set to DISABLED when they start and ENABLED when they complete.

Note: It is recommended to avoid writing to the Video Display Processor (VDP) during an interrupt service routine (ISR) since it can corrupt the VDP pointer of an VDP operation already in progress.

If it is necessary, this flag can be used during an ISR to determine whether a VDP operation is already in progress. If the value is 1 then avoid writing to the VDP (tiles, map, scrolling, colors, etc).

// at the beginning of and ISR that would write to the VDP

if (_shadow_OAM_OFF) return;

_shadow_OAM_OFF

volatile uint8_t _shadow_OAM_OFF

See also: docs_consoles_safe_display_controller_access

Data Structures

Macros

Typedefs

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ SEGA

◆ VBK_REG

◆ J_UP

◆ J_DOWN

◆ J_LEFT

◆ J_RIGHT

◆ J_A

◆ J_B

◆ M_TEXT_OUT

◆ M_TEXT_INOUT

◆ M_NO_SCROLL

◆ M_NO_INTERP

◆ S_FLIPX

◆ S_FLIPY

◆ S_PALETTE

◆ S_PRIORITY

◆ S_PAL

◆ __WRITE_VDP_REG

◆ __READ_VDP_REG

◆ EMPTY_IFLAG

◆ VBL_IFLAG

◆ LCD_IFLAG

◆ TIM_IFLAG

◆ SIO_IFLAG

◆ JOY_IFLAG

◆ SCREENWIDTH

◆ SCREENHEIGHT

◆ MINWNDPOSX

◆ MINWNDPOSY

◆ MAXWNDPOSX

◆ MAXWNDPOSY

◆ DISPLAY_ON

◆ DISPLAY_OFF

◆ HIDE_LEFT_COLUMN

◆ SHOW_LEFT_COLUMN

◆ SHOW_BKG

◆ HIDE_BKG

◆ SHOW_WIN

◆ HIDE_WIN

◆ SHOW_SPRITES

◆ HIDE_SPRITES

◆ SPRITES_8x16

◆ SPRITES_8x8

◆ DEVICE_SUPPORTS_COLOR

◆ _current_bank

◆ CURRENT_BANK

◆ BANK

◆ BANKREF

◆ BANKREF_EXTERN

◆ SWITCH_ROM

◆ SWITCH_ROM1

◆ SWITCH_ROM2

◆ SWITCH_RAM

◆ ENABLE_RAM

◆ DISABLE_RAM

◆ set_bkg_palette_entry

◆ set_sprite_palette_entry

◆ set_bkg_palette

◆ set_sprite_palette

◆ COMPAT_PALETTE

◆ set_bkg_tiles

◆ set_win_tiles

◆ fill_bkg_rect

◆ fill_win_rect

◆ DISABLE_VBL_TRANSFER

◆ ENABLE_VBL_TRANSFER

◆ MAX_HARDWARE_SPRITES

◆ HARDWARE_SPRITE_CAN_FLIP_X

◆ HARDWARE_SPRITE_CAN_FLIP_Y

◆ set_bkg_tile_xy

◆ set_win_tile_xy

◆ get_win_xy_addr

Typedef Documentation