VDP related function. More...

#include <libmd/types.h>

Defines
#define	REG_NULL 0
	Use to set a vdp register to 0.
#define	REG0_HVCOUNTER 0x2
	Stop HV counter.
#define	REG0_BASE 0x4
	Base for REG0.
#define	REG0_HINT 0x10
	Enable HINT.
#define	REG1_BASE 0x4
	Base for REG1.
#define	REG1_PAL 0x8
	Enable PAL mode.
#define	REG1_DMA 0x10
	Enable DMA.
#define	REG1_VINT 0x20
	Enable VINT.
#define	REG1_DISPLAY 0x40
	Enable DISPLAY.
#define	REG2_PLANEA(addr) ((addr & 0xE000) >> 10)
	Set PLANEA address.
#define	REG3_WINDOW(addr) ((addr & 0xF800) >> 10)
	Set WINDOW address.
#define	REG4_PLANEB(addr) ((addr & 0xE000) >> 13)
	Set PLANEB address.
#define	REG5_SPRITE(addr) ((addr & 0xFE00) >> 9)
	Set SPRITE address.
#define	REG7_PAL(pal) ((pal & 0x3) << 4)
	Select the palette pal for the bg color.
#define	REG7_COLOR(color) (color & 0xF)
	Select the color color for the bg color.
#define	REG11_HFULL 0x0
	Set horizontal full scroll mode.
#define	REG11_H1CELL 0x2
	Set horizontal 1 cell scroll mode.
#define	REG11_H1LINE 0x3
	Set horizontal 1 line scroll mode.
#define	REG11_VFULL 0x0
	Set vertical full scroll mode.
#define	REG11_V2CELL 0x4
	Set vertical 2 cell scroll mode.
#define	REG11_EINT 0x8
	Enable external interupt.
#define	REG12_40CELL 0x81
	Set 40 cell mode.
#define	REG12_SHADOW 0x8
	Enable Shadow/Highlight.
#define	REG12_INTERLACE 0x2
	Select interlace mode.
#define	REG12_DINTERLACE 0x6
	Select double interlace mode.
#define	REG13_HSCROLL(addr) ((addr & 0xFC00) >> 10)
	Set HSCROLL address.
#define	REG15_AUTOINC(x) x
	Set VDP autoinc to x.
#define	REG16_32X32 0x0
	Set scroll size to 32x32.
#define	REG16_32X64 0x10
	Set scroll size to 32x64.
#define	REG16_32X128 0x30
	Set scroll size to 32x128.
#define	REG16_64X32 0x1
	Set scroll size to 64x32.
#define	REG16_64X64 0x11
	Set scroll size to 64x64.
#define	REG16_64X128 0x31
	64x128
#define	REG16_128X32 0x3
	Set scroll size to 128x32.
#define	REG16_128X64 0x13
	Set scroll size to 128x64.
#define	REG16_128X128 0x33
	Set scroll size to 128x128.
#define	SPRITE_SIZE_8X8 (0x0 << 8)
	Set sprite size to 8x8.
#define	SPRITE_SIZE_8X16 (0x1 << 8)
	Set sprite size to 8x16.
#define	SPRITE_SIZE_8X24 (0x2 << 8)
	Set sprite size to 8x24.
#define	SPRITE_SIZE_8X32 (0x3 << 8)
	Set sprite size to 8x32.
#define	SPRITE_SIZE_16X8 (0x4 << 8)
	Set sprite size to 16x8.
#define	SPRITE_SIZE_16X16 (0x5 << 8)
	Set sprite size to 16x16.
#define	SPRITE_SIZE_16X24 (0x6 << 8)
	Set sprite size to 16x24.
#define	SPRITE_SIZE_16X32 (0x7 << 8)
	Set sprite size to 16x32.
#define	SPRITE_SIZE_24X8 (0x8 << 8)
	Set sprite size to 24x8.
#define	SPRITE_SIZE_24X16 (0x9 << 8)
	Set sprite size to 24x16.
#define	SPRITE_SIZE_24X24 (0xA << 8)
	Set sprite size to 24x24.
#define	SPRITE_SIZE_24X32 (0xB << 8)
	Set sprite size to 24x32.
#define	SPRITE_SIZE_32X8 (0xC << 8)
	Set sprite size to 32x8.
#define	SPRITE_SIZE_32X16 (0xD << 8)
	Set sprite size to 32x16.
#define	SPRITE_SIZE_32X24 (0xE << 8)
	Set sprite size to 32x24.
#define	SPRITE_SIZE_32X32 (0xF << 8)
	Set sprite size to 32x32.
#define	CRAM_WRITE 0x3
	Set write access to CRAM.
#define	CRAM_READ 0x8
	Set read access to CRAM.
#define	VRAM_WRITE 0x1
	Set write access to VRAM.
#define	VRAM_READ 0x0
	Set read access to VRAM.
#define	VSRAM_WRITE 0x5
	Set write access to VSRAM.
#define	VSRAM_READ 0x4
	Set read access to VSRAM.
#define	DMA_TO_VRAM 0x1
	Set destination to VRAM for DMA.
#define	DMA_TO_CRAM 0x3
	Set destination to CRAM for DMA.
#define	DMA_TO_VSRAM 0x5
	Set destination to VSRAM for DMA.
#define	VDP_BUILD_TILE(n, vflip, hflip, pal, shadow) (n \| (vflip << 11) \| (hflip << 12) \| (pal << 13) \| (shadow << 15))
	Build a tile definition.
Functions
void	vdp_pointto (u32 addr, u8 access)
	Set the VDP address to addr in the correct region and access mode.
void	vdp_setreg (u32 reg, u32 data)
	Set a VDP register.
void	vdp_write (u16 data)
	Write 16bits to the VDP.
void	vdp_write16 (u16 data)
	Write 16bits to the VDP.
void	vdp_write32 (u32 data)
	Write 16bits to the VDP.
void	vdp_writetocram (u8 size, const void *src, u8 dst)
	Write a palette in the VDP.
void	vdp_writetovram (u16 size, const void *from, u16 dst)
	Write size byte of data from *src.
void	vdp_writetovsram (u16 size, const void *from, u16 dst)
	Write size byte of data from *src.
void	vdp_dma (u16 size, const void *from, u16 dst, u8 region)
	Write size byte of data from *src to dst using the DMA.
void	vdp_dmafill (u16 size, u16 dst, u16 data)
	Fill size byte with data to dst using the DMA.
void	vdp_waitdma (void)
	Wait for dma completion.
void	vdp_clrvram (void)
	Clear the VDP VRAM.
void	vdp_clrvsram (void)
	Clear the VDP VSRAM.
void	vdp_waitvsync (void)
	Wait for the next VBLANK.

Detailed Description

VDP related function.

Define Documentation

#define VDP_BUILD_TILE	(	n,
		vflip,
		hflip,
		pal,
		shadow
	)	(n \| (vflip << 11) \| (hflip << 12) \| (pal << 13) \| (shadow << 15))

Build a tile definition.

Build a tile definition with n = tilenumber vflip = flip the tile verticaly hflip = flip the tile horizontaly pal = palette to use shadow = enable shadow

Function Documentation

void vdp_clrvram ( void )

Clear the VDP VRAM.

You have to set the autoinc register (#15) to 2 before calling this function

void vdp_clrvsram ( void )

Clear the VDP VSRAM.

You have to set the autoinc register (#15) to 2 before calling this function

void vdp_dma	(	u16	size,
		const void *	from,
		u16	dst,
		u8	region
	)

Write size byte of data from *src to dst using the DMA.

Parameters:

size	The amount of data to write in byte
from	The address of the data to write
dst	The destination address in VDP
region	The destination RAM in VDP (VRAM, CRAM or VSRAM)

void vdp_dmafill	(	u16	size,
		u16	dst,
		u16	data
	)

Fill size byte with data to dst using the DMA.

Parameters:

size	The amount of data to write in byte
dst	The destination address in VDP
data	The data to fill

void vdp_pointto	(	u32	addr,
		u8	access
	)

Set the VDP address to addr in the correct region and access mode.

Parameters:

addr	the address to point to
access	the region and access type

void vdp_setreg	(	u32	reg,
		u32	data
	)

Set a VDP register.

Parameters:

reg	The register number
data	The register data

void vdp_write ( u16 data )

Write 16bits to the VDP.

Parameters:

data	Data to write

void vdp_write16 ( u16 data )

Write 16bits to the VDP.

Parameters:

data	Data to write

void vdp_write32 ( u32 data )

Write 16bits to the VDP.

Parameters:

data	Data to write

void vdp_writetocram	(	u8	size,
		const void *	src,
		u8	dst
	)

Write a palette in the VDP.

Parameters:

size	The amount of data to write in byte
src	The address of the data to write
dst	The destination address in CRAM

void vdp_writetovram	(	u16	size,
		const void *	from,
		u16	dst
	)

Write size byte of data from *src.

Parameters:

size	The amount of data to write in byte
from	The address of the data to write
dst	The destination address in VRAM

void vdp_writetovsram	(	u16	size,
		const void *	from,
		u16	dst
	)

Write size byte of data from *src.

Parameters:

size	The amount of data to write in byte
from	The address of the data to write
dst	The destination address in VRAM

vdp.h File Reference

Defines

Functions

Detailed Description

Define Documentation

Function Documentation