vdp.h

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/*
 * Copyright 2009-2010 The MegaDrive.Org Team
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 * 
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 * 
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list
 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE MEGADRIVE.ORG TEAM ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EMMANUEL VADOT OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/* $Id: vdp_8h_source.html,v 1.7 2010/01/16 18:03:05 elbarto Exp $ */

#include <types.h>

#define REG_NULL        0


#define REG0_HVCOUNTER  0x2
#define REG0_BASE       0x4
#define REG0_HINT       0x10

#define REG1_BASE       0x4
#define REG1_PAL        0x8
#define REG1_DMA        0x10
#define REG1_VINT       0x20
#define REG1_DISPLAY    0x40

#define REG2_PLANEA(addr)       ((addr & 0xE000) >> 10)

#define REG3_WINDOW(addr)       ((addr & 0xF800) >> 10)

#define REG4_PLANEB(addr)       ((addr & 0xE000) >> 13)

#define REG5_SPRITE(addr)       ((addr & 0xFE00) >> 9)

#define REG7_PAL(pal)   ((pal & 0x3) << 4)
#define REG7_COLOR(color)       (color & 0xF)

#define REG11_HFULL     0x0
#define REG11_H1CELL    0x2
#define REG11_H1LINE    0x3
#define REG11_VFULL     0x0
#define REG11_V2CELL    0x4
#define REG11_EINT      0x8

#define REG12_40CELL            0x81
#define REG12_SHADOW            0x8
#define REG12_INTERLACE         0x2
#define REG12_DINTERLACE        0x6

#define REG13_HSCROLL(addr)     ((addr & 0xFC00) >> 10)

#define REG15_AUTOINC(x)        x

#define REG16_32X32     0x0
#define REG16_32X64     0x10
#define REG16_32X128    0x30
#define REG16_64X32     0x1
#define REG16_64X64     0x11
#define REG16_64X128    0x31
#define REG16_128X32    0x3
#define REG16_128X64    0x13
#define REG16_128X128   0x33

#define SPRITE_SIZE_8X8         (0x0 << 8)
#define SPRITE_SIZE_8X16        (0x1 << 8)
#define SPRITE_SIZE_8X24        (0x2 << 8)
#define SPRITE_SIZE_8X32        (0x3 << 8)
#define SPRITE_SIZE_16X8        (0x4 << 8)
#define SPRITE_SIZE_16X16       (0x5 << 8)
#define SPRITE_SIZE_16X24       (0x6 << 8)
#define SPRITE_SIZE_16X32       (0x7 << 8)
#define SPRITE_SIZE_24X8        (0x8 << 8)
#define SPRITE_SIZE_24X16       (0x9 << 8)
#define SPRITE_SIZE_24X24       (0xA << 8)
#define SPRITE_SIZE_24X32       (0xB << 8)
#define SPRITE_SIZE_32X8        (0xC << 8)
#define SPRITE_SIZE_32X16       (0xD << 8)
#define SPRITE_SIZE_32X24       (0xE << 8)
#define SPRITE_SIZE_32X32       (0xF << 8)

#define CRAM_WRITE      0x3
#define CRAM_READ       0x8
#define VRAM_WRITE      0x1
#define VRAM_READ       0x0
#define VSRAM_WRITE     0x5
#define VSRAM_READ      0x4

#define DMA_TO_VRAM     0x1
#define DMA_TO_CRAM     0x3
#define DMA_TO_VSRAM    0x5

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

void    vdp_pointto(u32 addr, u8 access);

void    vdp_setreg(u32 reg, u32 data);

void    vdp_write(u16 data);

void    vdp_write16(u16 data);

void    vdp_write32(u32 data);

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

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

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

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

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

void    vdp_waitdma(void);

void    vdp_clrvram(void);

void    vdp_clrvsram(void);

void    vdp_waitvsync(void);

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