#include "type.h"

/* memory offsets */

typedef unsigned char vdp2_vram[0x080000];
typedef unsigned char vdp2_res0[0x080000];
typedef unsigned char vdp2_cram[0x001000];
typedef unsigned char vdp2_res1[0x07f000];

typedef struct vdp2_reg {
  reg16 TVMD;   /* TV SCREEN MODE */
  reg16 EXTEN;  /* EXTERNAL SIGNAL ENABLE */
  reg16 TVSTAT; /* SCREEN STATUS */
  reg16 VRSIZE; /* VRAM SIZE */
  reg16 HCNT;   /* H-COUNTER */
  reg16 VCNT;   /* V-COUNTER */
  reg16 _res0;
  reg16 RAMCTL; /* RAM CONTROL */
  reg16 CYCA0L; /* VRAM CYCLE PATTERN (BANK A0) */
  reg16 CYCA0U; /* VRAM CYCLE PATTERN (BANK A0) */
  reg16 CYCA1L; /* VRAM CYCLE PATTERN (BANK A1) */
  reg16 CYCA1U; /* VRAM CYCLE PATTERN (BANK A1) */
  reg16 CYCB0L; /* VRAM CYCLE PATTERN (BANK A0) */
  reg16 CYCB0U; /* VRAM CYCLE PATTERN (BANK A0) */
  reg16 CYCB1L; /* VRAM CYCLE PATTERN (BANK B1) */
  reg16 CYCB1U; /* VRAM CYCLE PATTERN (BANK B1) */
  reg16 BGON;   /* SCREEN DISPLAY ENABLE */
  reg16 MZCTL;  /* MOSAIC CONTROL */
  reg16 SFSEL;  /* SPECIAL FUNCTION CODE SELECT */
  reg16 SFCODE; /* SPECIAL FUNCTION CODE */
  reg16 CHCTLA; /* CHARACTER CONTROL (NBG0, NBG1) */
  reg16 CHCTLB; /* CHARACTER CONTROL (NBG2, NBG3, RGB0) */
  reg16 BMPNA;  /* BITMAP PALETTE NUMBER (NBG0, NBG1) */
  reg16 BMPNB;  /* BITMAP PALETTE NUMBER (RGB0) */
  reg16 NBG0;   /* PATTERN NAME CONTROL (NBG0) */
  reg16 NBG1;   /* PATTERN NAME CONTROL (NBG1) */
  reg16 NBG2;   /* PATTERN NAME CONTROL (NBG2) */
  reg16 NBG3;   /* PATTERN NAME CONTROL (NBG2) */
  reg16 RGB0;   /* PATTERN NAME CONTROL (RGB0) */
  reg16 PLSZ;   /* PLANE SIZE */
  reg16 MPOFN;  /* MAP OFFSET (NBG0~NBG3) */
  reg16 MPOFR;  /* MAP OFFSET (ROTATION PARAMETER A,B) */
  reg16 MPABN0; /* MAP (NBG0, PLANE A,B) */
  reg16 MPCDN0; /* MAP (NBG0, PLANE C,D) */
  reg16 MPABN1; /* MAP (NBG1, PLANE A,B) */
  reg16 MPCDN1; /* MAP (NBG1, PLANE C,D) */
  reg16 MPABN2; /* MAP (NBG2, PLANE A,B) */
  reg16 MPCDN2; /* MAP (NBG2, PLANE C,D) */
  reg16 MPABN3; /* MAP (NBG3, PLANE A,B) */
  reg16 MPCDN3; /* MAP (NBG3, PLANE C,D) */
  reg16 MPABRA; /* MAP (ROTATION PARAMETER A, PLANE A,B) */
  reg16 MPCDRA; /* MAP (ROTATION PARAMETER A, PLANE C,D) */
  reg16 MPEFRA; /* MAP (ROTATION PARAMETER A, PLANE E,F) */
  reg16 MPGHRA; /* MAP (ROTATION PARAMETER A, PLANE G,H) */
  reg16 MPIJRA; /* MAP (ROTATION PARAMETER A, PLANE I,J) */
  reg16 MPKLRA; /* MAP (ROTATION PARAMETER A, PLANE K,L) */
  reg16 MPMNRA; /* MAP (ROTATION PARAMETER A, PLANE M,N) */
  reg16 MPOPRA; /* MAP (ROTATION PARAMETER A, PLANE O,P) */
  reg16 MPABRB; /* MAP (ROTATION PARAMETER B, PLANE B,B) */
  reg16 MPCDRB; /* MAP (ROTATION PARAMETER B, PLANE C,D) */
  reg16 MPEFRB; /* MAP (ROTATION PARAMETER B, PLANE E,F) */
  reg16 MPGHRB; /* MAP (ROTATION PARAMETER B, PLANE G,H) */
  reg16 MPIJRB; /* MAP (ROTATION PARAMETER B, PLANE I,J) */
  reg16 MPKLRB; /* MAP (ROTATION PARAMETER B, PLANE K,L) */
  reg16 MPMNRB; /* MAP (ROTATION PARAMETER B, PLANE M,N) */
  reg16 MPOPRB; /* MAP (ROTATION PARAMETER B, PLANE O,P) */
  reg16 SCXIN0; /* SCREEN SCROLL VALUE (NBG0, HORIZONTAL INTEGER PART) */
  reg16 SCXDN0; /* SCREEN SCROLL VALUE (NBG0, HORIZONTAL FRACTIONAL PART) */
  reg16 SCYIN0; /* SCREEN SCROLL VALUE (NBG0, VERTICAL INTEGER PART) */
  reg16 SCYDN0; /* SCREEN SCROLL VALUE (NBG0, VERTICAL FRACTIONAL PART) */
  reg16 ZMXIN0; /* COORDINATE INCREMENT (NBG0, HORIZONTAL INTEGER PART) */
  reg16 ZMXDN0; /* COORDINATE INCREMENT (NBG0, HORIZONTAL FRACTIONAL PART) */
  reg16 ZMYIN0; /* COORDINATE INCREMENT (NBG0, VERTICAL INTEGER PART) */
  reg16 ZMYDN0; /* COORDINATE INCREMENT (NBG0, VERTICAL FRACTIONAL PART) */
  reg16 SCXIN1; /* SCREEN SCROLL VALUE (NBG1, HORIZONTAL INTEGER PART) */
  reg16 SCXDN1; /* SCREEN SCROLL VALUE (NBG1, HORIZONTAL FRACTIONAL PART) */
  reg16 SCYIN1; /* SCREEN SCROLL VALUE (NBG1, VERTICAL INTEGER PART) */
  reg16 SCYDN1; /* SCREEN SCROLL VALUE (NBG1, VERTICAL FRACTIONAL PART) */
  reg16 ZMXIN1; /* COORDINATE INCREMENT (NBG1, HORIZONTAL INTEGER PART) */
  reg16 ZMXDN1; /* COORDINATE INCREMENT (NBG1, HORIZONTAL FRACTIONAL PART) */
  reg16 ZMYIN1; /* COORDINATE INCREMENT (NBG1, VERTICAL INTEGER PART) */
  reg16 ZMYDN1; /* COORDINATE INCREMENT (NBG1, VERTICAL FRACTIONAL PART) */
  reg16 SCXN2;  /* SCREEN SCROLL VALUE (NBG2, HORIZONTAL) */
  reg16 SCYN2;  /* SCREEN SCROLL VALUE (NBG2, VERTICAL) */
  reg16 SCXN3;  /* SCREEN SCROLL VALUE (NBG3, HORIZONTAL) */
  reg16 SCYN3;  /* SCREEN SCROLL VALUE (NBG3, VERTICAL) */
  reg16 ZMCTL;  /* REDUCTION ENABLE */
  reg16 SCRCTL; /* LINE AND VERTICAL CELL SCROLL CONTROL (NBGO, NBG1) */
  reg16 VCSTAU; /* VERTICAL CELL SCROLL TABLE ADDRESS (NBGO, NBG1) */
  reg16 VCSTAL; /* VERTICAL CELL SCROLL TABLE ADDRESS (NBGO, NBG1) */
  reg16 LSTA0U; /* LINE SCROLL TABLE ADDRESS (NBG0) */
  reg16 LSTA0L; /* LINE SCROLL TABLE ADDRESS (NBG0) */
  reg16 LSTA1U; /* LINE SCROLL TABLE ADDRESS (NBG1) */
  reg16 LSTA1L; /* LINE SCROLL TABLE ADDRESS (NBG1) */
  reg16 LCTAU;  /* LINE COLOR SCREEN TABLE ADDRESS */
  reg16 LCTAL;  /* LINE COLOR SCREEN TABLE ADDRESS */
  union {
    struct {
      reg16 BKTAU;  /* BACK SCREEN TABLE ADDRESS */
      reg16 BKTAL;  /* BACK SCREEN TABLE ADDRESS */
    };
    reg32 BKTA;
  };
  reg16 RPMD;   /* ROTATION PARAMETER MODE */
  reg16 RPRCTL; /* ROTATION PARAMETER READ CONTROL */
  reg16 KTCTL;  /* COEFFICIENT TABLE CONTROL */
  reg16 KTAOF;  /* COEFFICIENT TABLE ADDRESS OFFSET (ROTATION PARAMETER A, B) */
  reg16 OVPNRA; /* SCREEN OVER PATTERN NAME (ROTATION PARAMETER A) */
  reg16 OVPNRB; /* SCREEN OVER PATTERN NAME (ROTATION PARAMETER B) */
  reg16 RPTAU;  /* ROTATION PARAMETER TABLE ADDRESS (ROTATION PARAMETER A,B) */
  reg16 RPTAL;  /* ROTATION PARAMETER TABLE ADDRESS (ROTATION PARAMETER A,B) */
  reg16 WPSX0;  /* WINDOW POSITION (W0, HORIZONTAL START POINT) */
  reg16 WPSY0;  /* WINDOW POSITION (W0, VERTICAL START POINT) */
  reg16 WPEX0;  /* WINDOW POSITION (W0, HORIZONTAL END POINT) */
  reg16 WPEY0;  /* WINDOW POSITION (W0, VERTICAL END POINT) */
  reg16 WPSX1;  /* WINDOW POSITION (W1, HORIZONTAL START POINT) */
  reg16 WPSY1;  /* WINDOW POSITION (W1, VERTICAL START POINT) */
  reg16 WPEX1;  /* WINDOW POSITION (W1, HORIZONTAL END POINT) */
  reg16 WPEY1;  /* WINDOW POSITION (W1, VERTICAL END POINT) */
  reg16 WCTLA;  /* WINDOW CONTROL (NBG0, NBG1) */
  reg16 WCTLB;  /* WINDOW CONTROL (NBG2, NBG3) */
  reg16 WCTLC;  /* WINDOW CONTROL (RGB0, SPRITE) */
  reg16 WCTLD;  /* WINDOW CONTROL (PARAMETER WINDOW, COLOR CALC. WINDOW) */
  reg16 LWTA0U; /* LINE WINDOW TABLE ADDRESS (W0) */
  reg16 LWTA0L; /* LINE WINDOW TABLE ADDRESS (W0) */
  reg16 LWTA1U; /* LINE WINDOW TABLE ADDRESS (W1) */
  reg16 LWTA1L; /* LINE WINDOW TABLE ADDRESS (W1) */
  reg16 SPCTL;  /* SPRITE CONTROL */
  reg16 SDCTL;  /* SHADOW CONTROL */
  reg16 CRAOFA; /* COLOR RAM ADDRESS OFFSET (NBG0~NBG3) */
  reg16 CRAOFB; /* COLOR RAM ADDRESS OFFSET (RGB0, SPRITE) */
  reg16 LNCLEN; /* LINE COLOR SCREEN ENABLE */
  reg16 SFPRMD; /* SPECIAL PRIORITY MODE */
  reg16 CCCTL;  /* COLOR CALCULATION CONTROL */
  reg16 SFCCMD; /* SPECIAL COLOR CALCULATION MODE */
  reg16 PRISA;  /* PRIORITY NUMBER (SPRITE 0,1) */
  reg16 PRISB;  /* PRIORITY NUMBER (SPRITE 2,3) */
  reg16 PRISC;  /* PRIORITY NUMBER (SPRITE 4,5) */
  reg16 PRISD;  /* PRIORITY NUMBER (SPRITE 6,7) */
  reg16 PRINA;  /* PRIORITY NUMBER (NBG0, NBG1) */
  reg16 PRINB;  /* PRIORITY NUMBER (NBG2, NBG3) */
  reg16 PRIR;   /* PRIORITY NUMBER (RGB0) */
  reg16 _res1;
  reg16 CCRSA;  /* COLOR CALCULATION RATIO (SPRITE 0,1) */
  reg16 CCRSB;  /* COLOR CALCULATION RATIO (SPRITE 2,3) */
  reg16 CCRSC;  /* COLOR CALCULATION RATIO (SPRITE 4,5) */
  reg16 CCRSD;  /* COLOR CALCULATION RATIO (SPRITE 6,7) */
  reg16 CCRNA;  /* COLOR CALCULATION RATIO (NBG0, NBG1) */
  reg16 CCRNB;  /* COLOR CALCULATION RATIO (NBG2, NBG3) */
  reg16 CCRR;   /* COLOR CALCULATION RATIO (RGB0) */
  reg16 CCRLB;  /* COLOR CALCULATION RATIO (LINE COLOR SCREEN, BACK SCREEN) */
  reg16 CLOFEN; /* COLOR OFFSET ENABLE */
  reg16 CLOFSL; /* COLOR OFFSET SELECT */
  reg16 COAR;   /* COLOR OFFSET A (RED) */
  reg16 COAG;   /* COLOR OFFSET A (GREEN) */
  reg16 COAB;   /* COLOR OFFSET A (BLUE) */
  reg16 COBR;   /* COLOR OFFSET B (RED) */
  reg16 COBG;   /* COLOR OFFSET B (GREEN) */
  reg16 COBB;   /* COLOR OFFSET B (BLUE) */
} vdp2_reg;

static_assert((sizeof (struct vdp2_reg)) == 0x120);

struct vdp2 {
  vdp2_vram vram;
  vdp2_res0 _res0;
  vdp2_cram cram;
  vdp2_res1 _res1;
  vdp2_reg reg;
};

static_assert((sizeof (struct vdp2)) == 0x180120);
static_assert((offsetof (struct vdp2, vram)) == 0x000000);
static_assert((offsetof (struct vdp2, cram)) == 0x100000);
static_assert((offsetof (struct vdp2, reg)) == 0x180000);

extern struct vdp2 vdp2 __asm("vdp2");

/* register bits */

/* TVMD */
#define TVMD__DISP (1 << 15)
#define TVMD__BDCLMD (1 << 8) // display back screen
#define TVMD__LSMD__NON_INTERLACE (0b00 << 6)
#define TVMD__LSMD__SINGLE_DENSITY (0b10 << 6)
#define TVMD__LSMD__DOUBLE_DENSITY (0b11 << 6)

#define TVMD__VRESO__224 (0b00 << 4)
#define TVMD__VRESO__240 (0b01 << 4)
#define TVMD__VRESO__256 (0b10 << 4)

#define TVMD__HRESO__NORMAL_320 (0b000 << 0)
#define TVMD__HRESO__NORMAL_352 (0b001 << 0)
#define TVMD__HRESO__HIRES_640 (0b010 << 0)
#define TVMD__HRESO__HIRES_704 (0b011 << 0)

#define TVMD__HRESO__EXCLUSIVE_320 (0b100 << 0)
#define TVMD__HRESO__EXCLUSIVE_352 (0b101 << 0)
#define TVMD__HRESO__EXCLUSIVE_640 (0b110 << 0)
#define TVMD__HRESO__EXCLUSIVE_704 (0b111 << 0)

/* TVSTAT */
#define TVSTAT__VBLANK (1 << 3)

/* BKTAU */
#define BKTAU__BKCLMD_SINGLE_COLOR (0 << 15)
#define BKTAU__BKCLMD_PER_LINE (1 << 15)