Pico/cd/gfx_cd.c

   1 // TODO...
   2
   3 #include "../PicoInt.h"
   4
   5 #define rot_comp Pico_mcd->rot_comp
   6
   7 static int Table_Rot_Time[] =
   8 {
   9         0x00054000, 0x00048000, 0x00040000, 0x00036000,          //; 008-032               ; briefing - sprite
  10         0x0002E000, 0x00028000, 0x00024000, 0x00022000,          //; 036-064               ; arbre souvent
  11         0x00021000, 0x00020000, 0x0001E000, 0x0001B800,          //; 068-096               ; map thunderstrike
  12         0x00019800, 0x00017A00, 0x00015C00, 0x00013E00,          //; 100-128               ; logo défoncé
  13
  14         0x00012000, 0x00011800, 0x00011000, 0x00010800,          //; 132-160               ; briefing - map
  15         0x00010000, 0x0000F800, 0x0000F000, 0x0000E800,          //; 164-192
  16         0x0000E000, 0x0000D800, 0x0000D000, 0x0000C800,          //; 196-224
  17         0x0000C000, 0x0000B800, 0x0000B000, 0x0000A800,          //; 228-256               ; batman visage
  18
  19         0x0000A000, 0x00009F00, 0x00009E00, 0x00009D00,          //; 260-288
  20         0x00009C00, 0x00009B00, 0x00009A00, 0x00009900,          //; 292-320
  21         0x00009800, 0x00009700, 0x00009600, 0x00009500,          //; 324-352
  22         0x00009400, 0x00009300, 0x00009200, 0x00009100,          //; 356-384
  23
  24         0x00009000, 0x00008F00, 0x00008E00, 0x00008D00,          //; 388-416
  25         0x00008C00, 0x00008B00, 0x00008A00, 0x00008900,          //; 420-448
  26         0x00008800, 0x00008700, 0x00008600, 0x00008500,          //; 452-476
  27         0x00008400, 0x00008300, 0x00008200, 0x00008100,          //; 480-512
  28 };
  29
  30
  31 #if 1*0
  32 typedef struct
  33 {
  34         unsigned int Reg_58;    // Stamp_Size
  35         unsigned int Reg_5A;
  36         unsigned int Reg_5C;
  37         unsigned int Reg_5E;
  38         unsigned int Reg_60;
  39         unsigned int Reg_62;
  40         unsigned int Reg_64;    // V_Dot
  41         unsigned int Reg_66;
  42
  43         unsigned int Stamp_Map_Adr;
  44         unsigned int Buffer_Adr;
  45         unsigned int Vector_Adr;
  46         unsigned int Jmp_Adr;
  47         unsigned int Float_Part;
  48         unsigned int Draw_Speed;
  49
  50         unsigned int XS;
  51         unsigned int YS;
  52         unsigned int DXS;
  53         unsigned int DYS;
  54         unsigned int XD;
  55         unsigned int YD;
  56         unsigned int XD_Mul;
  57         unsigned int H_Dot;
  58 } Rot_Comp;
  59 #endif
  60
  61 static void gfx_cd_start(void)
  62 {
  63         int upd_len;
  64
  65         dprintf("gfx_cd_start()");
  66
  67         upd_len = (rot_comp.Reg_62 >> 3) & 0x3f;
  68         upd_len = Table_Rot_Time[upd_len];
  69
  70         rot_comp.Draw_Speed = rot_comp.Float_Part = upd_len;
  71
  72         rot_comp.Reg_58 |= 0x8000;      // Stamp_Size,  we start a new GFX operation
  73
  74         gfx_cd_update();
  75 }
  76
  77
  78 static void gfx_completed(void)
  79 {
  80         rot_comp.Reg_58 &= 0x7fff;      // Stamp_Size
  81         rot_comp.Reg_64  = 0;
  82         if (Pico_mcd->s68k_regs[0x33] & (1<<1))
  83         {
  84                 dprintf("gfx_cd irq 1");
  85                 SekInterruptS68k(1);
  86         }
  87 }
  88
  89
  90 //static void gfx_do(void)
  91 //{
  92 //}
  93
  94
  95 void gfx_cd_update(void)
  96 {
  97         unsigned char *V_Dot = (unsigned char *) &rot_comp.Reg_64;
  98         int jobs;
  99
 100         dprintf("gfx_cd_update, Reg_64 = %04x", rot_comp.Reg_64);
 101
 102         if (!*V_Dot)
 103         {
 104                 // ...
 105                 gfx_completed();
 106                 return;
 107         }
 108
 109         jobs = rot_comp.Float_Part >> 16;
 110
 111         if (!jobs)
 112         {
 113                 rot_comp.Float_Part += rot_comp.Draw_Speed;
 114                 return;
 115         }
 116
 117         rot_comp.Float_Part &= 0xffff;
 118         rot_comp.Float_Part += rot_comp.Draw_Speed;
 119
 120         while (jobs--)
 121         {
 122                 // jmp [Jmp_Adr]:
 123                 (*V_Dot)--;     // dec byte [V_Dot]
 124
 125                 if (!*V_Dot)
 126                 {
 127                         // GFX_Completed:
 128                         gfx_completed();
 129                         return;
 130                 }
 131         }
 132 }
 133
 134
 135 unsigned int gfx_cd_read(unsigned int a)
 136 {
 137         unsigned int d = 0;
 138
 139         switch (a) {
 140                 case 0x58: d = rot_comp.Reg_58; break;
 141                 case 0x5A: d = rot_comp.Reg_5A; break;
 142                 case 0x5C: d = rot_comp.Reg_5C; break;
 143                 case 0x5E: d = rot_comp.Reg_5E; break;
 144                 case 0x60: d = rot_comp.Reg_60; break;
 145                 case 0x62: d = rot_comp.Reg_62; break;
 146                 case 0x64: d = rot_comp.Reg_64; break;
 147                 case 0x66: break;
 148                 default: dprintf("gfx_cd_read: unexpected address: %02x", a); break;
 149         }
 150
 151         dprintf("gfx_cd_read(%02x) = %04x", a, d);
 152
 153         return 0;
 154 }
 155
 156 void gfx_cd_write(unsigned int a, unsigned int d)
 157 {
 158         dprintf("gfx_cd_write(%x, %04x)", a, d);
 159
 160         switch (a) {
 161                 case 0x58: // .Reg_Stamp_Size
 162                         rot_comp.Reg_58 = d & 7;
 163                         return;
 164
 165                 case 0x5A: // .Reg_Stamp_Adr
 166                         rot_comp.Reg_5A = d & 0xffe0;
 167                         return;
 168
 169                 case 0x5C: // .Reg_IM_VCell_Size
 170                         rot_comp.Reg_5C = d & 0x1f;
 171                         return;
 172
 173                 case 0x5E: // .Reg_IM_Adr
 174                         rot_comp.Reg_5E = d & 0xFFF8;
 175                         return;
 176
 177                 case 0x60: // .Reg_IM_Offset
 178                         rot_comp.Reg_60 = d & 0x3f;
 179                         return;
 180
 181                 case 0x62: // .Reg_IM_HDot_Size
 182                         rot_comp.Reg_62 = d & 0x1ff;
 183                         return;
 184
 185                 case 0x64: // .Reg_IM_VDot_Size
 186                         rot_comp.Reg_64 = d & 0xff;     // V_Dot, must be 32bit?
 187                         return;
 188
 189                 case 0x66: // .Reg_Vector_Adr
 190                         rot_comp.Reg_66 = d & 0xfffe;
 191                         if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
 192                         gfx_cd_start();
 193                         return;
 194
 195                 default: dprintf("gfx_cd_write: unexpected address: %02x", a); return;
 196         }
 197 }
 198
 199