Pico/cd/gfx_cd.c

   1 // TODO...
   2
   3 // #include <string.h>
   4 #include "../PicoInt.h"
   5
   6 #define rot_comp Pico_mcd->rot_comp
   7
   8 static const int Table_Rot_Time[] =
   9 {
  10         0x00054000, 0x00048000, 0x00040000, 0x00036000,          //; 008-032               ; briefing - sprite
  11         0x0002E000, 0x00028000, 0x00024000, 0x00022000,          //; 036-064               ; arbre souvent
  12         0x00021000, 0x00020000, 0x0001E000, 0x0001B800,          //; 068-096               ; map thunderstrike
  13         0x00019800, 0x00017A00, 0x00015C00, 0x00013E00,          //; 100-128               ; logo défoncé
  14
  15         0x00012000, 0x00011800, 0x00011000, 0x00010800,          //; 132-160               ; briefing - map
  16         0x00010000, 0x0000F800, 0x0000F000, 0x0000E800,          //; 164-192
  17         0x0000E000, 0x0000D800, 0x0000D000, 0x0000C800,          //; 196-224
  18         0x0000C000, 0x0000B800, 0x0000B000, 0x0000A800,          //; 228-256               ; batman visage
  19
  20         0x0000A000, 0x00009F00, 0x00009E00, 0x00009D00,          //; 260-288
  21         0x00009C00, 0x00009B00, 0x00009A00, 0x00009900,          //; 292-320
  22         0x00009800, 0x00009700, 0x00009600, 0x00009500,          //; 324-352
  23         0x00009400, 0x00009300, 0x00009200, 0x00009100,          //; 356-384
  24
  25         0x00009000, 0x00008F00, 0x00008E00, 0x00008D00,          //; 388-416
  26         0x00008C00, 0x00008B00, 0x00008A00, 0x00008900,          //; 420-448
  27         0x00008800, 0x00008700, 0x00008600, 0x00008500,          //; 452-476
  28         0x00008400, 0x00008300, 0x00008200, 0x00008100,          //; 480-512
  29 };
  30
  31
  32 #if 1*0
  33 typedef struct
  34 {
  35         unsigned int Reg_58;    // Stamp_Size
  36         unsigned int Reg_5A;
  37         unsigned int Reg_5C;
  38         unsigned int Reg_5E;
  39         unsigned int Reg_60;
  40         unsigned int Reg_62;
  41         unsigned int Reg_64;    // V_Dot
  42         unsigned int Reg_66;
  43
  44         unsigned int Stamp_Map_Adr;
  45         unsigned int Buffer_Adr;
  46         unsigned int Vector_Adr;
  47         unsigned int Jmp_Adr;
  48         unsigned int Float_Part;
  49         unsigned int Draw_Speed;
  50
  51         unsigned int XS;
  52         unsigned int YS;
  53         unsigned int DXS;
  54         unsigned int DYS;
  55         unsigned int XD;
  56         unsigned int YD;
  57         unsigned int XD_Mul;
  58         unsigned int H_Dot;
  59 } Rot_Comp;
  60 #endif
  61
  62 static void gfx_cd_start(void)
  63 {
  64         int upd_len;
  65
  66         dprintf("gfx_cd_start()");
  67
  68         upd_len = (rot_comp.Reg_62 >> 3) & 0x3f;
  69         upd_len = Table_Rot_Time[upd_len];
  70
  71         rot_comp.Draw_Speed = rot_comp.Float_Part = upd_len;
  72
  73         rot_comp.Reg_58 |= 0x8000;      // Stamp_Size,  we start a new GFX operation
  74
  75         gfx_cd_update();
  76 }
  77
  78
  79 static void gfx_completed(void)
  80 {
  81         rot_comp.Reg_58 &= 0x7fff;      // Stamp_Size
  82         rot_comp.Reg_64  = 0;
  83         if (Pico_mcd->s68k_regs[0x33] & (1<<1))
  84         {
  85                 dprintf("gfx_cd irq 1");
  86                 SekInterruptS68k(1);
  87         }
  88 }
  89
  90
  91 //static void gfx_do(void)
  92 //{
  93 //}
  94
  95
  96 void gfx_cd_update(void)
  97 {
  98         unsigned char *V_Dot = (unsigned char *) &rot_comp.Reg_64;
  99         int jobs;
 100
 101         dprintf("gfx_cd_update, Reg_64 = %04x", rot_comp.Reg_64);
 102
 103         if (!*V_Dot)
 104         {
 105                 // ...
 106                 gfx_completed();
 107                 return;
 108         }
 109
 110         jobs = rot_comp.Float_Part >> 16;
 111
 112         if (!jobs)
 113         {
 114                 rot_comp.Float_Part += rot_comp.Draw_Speed;
 115                 return;
 116         }
 117
 118         rot_comp.Float_Part &= 0xffff;
 119         rot_comp.Float_Part += rot_comp.Draw_Speed;
 120
 121         while (jobs--)
 122         {
 123                 // jmp [Jmp_Adr]:
 124                 (*V_Dot)--;     // dec byte [V_Dot]
 125
 126                 if (!*V_Dot)
 127                 {
 128                         // GFX_Completed:
 129                         gfx_completed();
 130                         return;
 131                 }
 132         }
 133 }
 134
 135
 136 unsigned int gfx_cd_read(unsigned int a)
 137 {
 138         unsigned int d = 0;
 139
 140         switch (a) {
 141                 case 0x58: d = rot_comp.Reg_58; break;
 142                 case 0x5A: d = rot_comp.Reg_5A; break;
 143                 case 0x5C: d = rot_comp.Reg_5C; break;
 144                 case 0x5E: d = rot_comp.Reg_5E; break;
 145                 case 0x60: d = rot_comp.Reg_60; break;
 146                 case 0x62: d = rot_comp.Reg_62; break;
 147                 case 0x64: d = rot_comp.Reg_64; break;
 148                 case 0x66: break;
 149                 default: dprintf("gfx_cd_read FIXME: unexpected address: %02x", a); break;
 150         }
 151
 152         dprintf("gfx_cd_read(%02x) = %04x", a, d);
 153
 154         return 0;
 155 }
 156
 157 void gfx_cd_write(unsigned int a, unsigned int d)
 158 {
 159         dprintf("gfx_cd_write(%x, %04x)", a, d);
 160
 161         switch (a) {
 162                 case 0x58: // .Reg_Stamp_Size
 163                         rot_comp.Reg_58 = d & 7;
 164                         return;
 165
 166                 case 0x5A: // .Reg_Stamp_Adr
 167                         rot_comp.Reg_5A = d & 0xffe0;
 168                         return;
 169
 170                 case 0x5C: // .Reg_IM_VCell_Size
 171                         rot_comp.Reg_5C = d & 0x1f;
 172                         return;
 173
 174                 case 0x5E: // .Reg_IM_Adr
 175                         rot_comp.Reg_5E = d & 0xFFF8;
 176                         return;
 177
 178                 case 0x60: // .Reg_IM_Offset
 179                         rot_comp.Reg_60 = d & 0x3f;
 180                         return;
 181
 182                 case 0x62: // .Reg_IM_HDot_Size
 183                         rot_comp.Reg_62 = d & 0x1ff;
 184                         return;
 185
 186                 case 0x64: // .Reg_IM_VDot_Size
 187                         rot_comp.Reg_64 = d & 0xff;     // V_Dot, must be 32bit?
 188                         return;
 189
 190                 case 0x66: // .Reg_Vector_Adr
 191                         rot_comp.Reg_66 = d & 0xfffe;
 192                         if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
 193                         gfx_cd_start();
 194                         return;
 195
 196                 default: dprintf("gfx_cd_write FIXME: unexpected address: %02x", a); return;
 197         }
 198 }
 199
 200
 201 void gfx_cd_reset(void)
 202 {
 203         memset(&rot_comp.Reg_58, 0, sizeof(rot_comp));
 204 }
 205
 206
 207 // --------------------------------
 208
 209 #include "cell_map.c"
 210
 211 typedef unsigned short u16;
 212
 213 void DmaSlowCell(unsigned int source, unsigned int a, int len, unsigned char inc)
 214 {
 215   unsigned char *base;
 216   unsigned int asrc, a2;
 217   u16 *r;
 218
 219   base = Pico_mcd->word_ram1M[Pico_mcd->s68k_regs[3]&1];
 220
 221   switch (Pico.video.type)
 222   {
 223     case 1: // vram
 224       r = Pico.vram;
 225       for(; len; len--)
 226       {
 227         asrc = cell_map(source >> 2) << 2;
 228         asrc |= source & 2;
 229         // if(a&1) d=(d<<8)|(d>>8); // ??
 230         r[a>>1] = *(u16 *)(base + asrc);
 231         source += 2;
 232         // AutoIncrement
 233         a=(u16)(a+inc);
 234       }
 235       rendstatus|=0x10;
 236       break;
 237
 238     case 3: // cram
 239       Pico.m.dirtyPal = 1;
 240       r = Pico.cram;
 241       for(a2=a&0x7f; len; len--)
 242       {
 243         asrc = cell_map(source >> 2) << 2;
 244         asrc |= source & 2;
 245         r[a2>>1] = *(u16 *)(base + asrc);
 246         source += 2;
 247         // AutoIncrement
 248         a2+=inc;
 249         // good dest?
 250         if(a2 >= 0x80) break;
 251       }
 252       a=(a&0xff00)|a2;
 253       break;
 254
 255     case 5: // vsram[a&0x003f]=d;
 256       r = Pico.vsram;
 257       for(a2=a&0x7f; len; len--)
 258       {
 259         asrc = cell_map(source >> 2) << 2;
 260         asrc |= source & 2;
 261         r[a2>>1] = *(u16 *)(base + asrc);
 262         source += 2;
 263         // AutoIncrement
 264         a2+=inc;
 265         // good dest?
 266         if(a2 >= 0x80) break;
 267       }
 268       a=(a&0xff00)|a2;
 269       break;
 270   }
 271   // remember addr
 272   Pico.video.addr=(u16)a;
 273 }
 274