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r7294 Tuesday 9th February, 2010 at 09:00:42 UTC by Barry Rodewald
[FMTOWNS] Converted text to render to VRAM, added inverse text, added VBlank flag.
[src/mess/drivers]fmtowns.c
[src/mess/video]fmtowns.c

src/mess/video/fmtowns.c
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115115static rectangle towns_crtc_layerscr[2];  // each layer has independent sizes
116116static UINT8 towns_display_plane;
117117static UINT8 towns_display_page_sel;
118static UINT8 towns_vblank_flag;
118119
119120extern UINT32* towns_vram;
120121extern UINT8* towns_gfxvram;
121122extern UINT8* towns_txtvram;
122extern UINT8* towns_sprram;
123//extern UINT8* towns_sprram;
123124
124125extern UINT32 towns_mainmem_enable;
125126extern UINT32 towns_ankcg_enable;
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464465   {
465466      case 0x02:  // 0x5ca - VSync clear?
466467         pic8259_set_irq_line(dev,3,0);
468         //towns_vblank_flag = 0;
467469         break;
468470   }
469471   logerror("VID: wrote 0x%02x to port %04x\n",data,offset+0x5c8);
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477479 */
478480READ8_HANDLER(towns_video_fd90_r)
479481{
482   UINT8 ret = 0;
480483   switch(offset)
481484   {
482485      case 0x00:
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496499      case 0x0e:
497500      case 0x0f:
498501         return towns_degipal[offset-0x08];
502      case 0x10:  // "sub status register" - bit 0 = vblank, bit 1 = hblank
503         if(towns_vblank_flag)
504            ret |= 0x01;
505         return ret;
499506   }
500507//  logerror("VID: read port %04x\n",offset+0xfd90);
501508   return 0x00;
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564571   {  // 0xc8000-0xc8fff
565572      if(towns_mainmem_enable == 0)
566573      {
567         if(towns_tvram_enable == 0)
568            return towns_sprram[offset];
569         else
574//         if(towns_tvram_enable == 0)
575//            return towns_sprram[offset];
576//         else
570577            return towns_txtvram[offset];
571578      }
572579      else
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582589      {
583590         if(towns_ankcg_enable != 0 && offset < 0x2800)
584591            return ROM[0x180000 + 0x3d000 + (offset-0x2000)];
585         if(towns_tvram_enable == 0)
586            return towns_sprram[offset];
587         else
592//         if(towns_tvram_enable == 0)
593//            return towns_sprram[offset];
594//         else
588595            return towns_txtvram[offset];
589596      }
590597      else
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620627
621628READ8_HANDLER( towns_spriteram_r)
622629{
623   return towns_sprram[offset];
630   return towns_txtvram[offset];
624631}
625632
626633WRITE8_HANDLER( towns_spriteram_w)
627634{
628   towns_sprram[offset] = data;
635   towns_txtvram[offset] = data;
629636}
630637
631638/*
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684691      for(xpos=xstart;xpos!=xend;xpos+=xdir)
685692      {
686693         voffset = 0;
687         pixel = (towns_sprram[poffset] & 0xf0) >> 4;
688         col = towns_sprram[coffset+(pixel*2)] | (towns_sprram[coffset+(pixel*2)+1] << 8);
694         pixel = (towns_txtvram[poffset] & 0xf0) >> 4;
695         col = towns_txtvram[coffset+(pixel*2)] | (towns_txtvram[coffset+(pixel*2)+1] << 8);
689696         voffset += (towns_crtc_reg[24] * 4) * ypos;  // scanline size in bytes * y pos
690697         voffset += (xpos & 0x1ff) * 2;
691698         voffset &= 0x3ffff;
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699706            voffset+=2;
700707         else
701708            voffset-=2;
702         pixel = towns_sprram[poffset] & 0x0f;
703         col = towns_sprram[coffset+(pixel*2)] | (towns_sprram[coffset+(pixel*2)+1] << 8);
709         pixel = towns_txtvram[poffset] & 0x0f;
710         col = towns_txtvram[coffset+(pixel*2)] | (towns_txtvram[coffset+(pixel*2)+1] << 8);
704711         voffset &= 0x3ffff;
705712         voffset += (towns_sprite_reg[6] & 0x10) ? 0x60000 : 0x40000;
706713         if(xpos <= rect->max_x && ypos <= rect->max_y && pixel != 0)
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750757      for(xpos=xstart;xpos!=xend;xpos+=xdir)
751758      {
752759         voffset = (towns_sprite_reg[6] & 0x10) ? 0x60000 : 0x40000;
753         col = towns_sprram[poffset] | (towns_sprram[poffset+1] << 8);
760         col = towns_txtvram[poffset] | (towns_txtvram[poffset+1] << 8);
754761         voffset += (towns_crtc_reg[24] * 4) * ypos;  // scanline size in bytes * y pos
755762         voffset += (xpos & 0x1ff) * 2;
756763         voffset &= 0x7ffff;
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781788   
782789   for(n=sprite_limit;n<1024;n++)
783790   {
784      x = towns_sprram[8*n] | (towns_sprram[8*n+1] << 8);
785      y = towns_sprram[8*n+2] | (towns_sprram[8*n+3] << 8);
786      attr = towns_sprram[8*n+4] | (towns_sprram[8*n+5] << 8);
787      colour = towns_sprram[8*n+6] | (towns_sprram[8*n+7] << 8);
791      x = towns_txtvram[8*n] | (towns_txtvram[8*n+1] << 8);
792      y = towns_txtvram[8*n+2] | (towns_txtvram[8*n+3] << 8);
793      attr = towns_txtvram[8*n+4] | (towns_txtvram[8*n+5] << 8);
794      colour = towns_txtvram[8*n+6] | (towns_txtvram[8*n+7] << 8);
788795      if(attr & 0x8000)
789796      {
790797         x += xoff;
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11491156   }
11501157}
11511158
1152void draw_text_layer(running_machine* machine,bitmap_t* bitmap, const rectangle* rect)
1159void render_text_char(running_machine* machine, UINT8 x, UINT8 y, UINT8 ascii, UINT16 jis, UINT8 attr)
11531160{
1161   UINT32 rom_addr;
1162   UINT32 vram_addr;
1163   UINT16 linesize = towns_crtc_reg[24] * 4;
1164   UINT8 code_h,code_l;
1165   UINT8 colour;
1166   UINT8 data;
1167   UINT8 temp;
1168   UINT8* font_rom = memory_region(machine,"user");
1169   int a,b;
1170   
1171   // all characters are 16 pixels high
1172   vram_addr = (x * 16) * linesize;
1173   
1174   if((attr & 0xc0) == 0)
1175      rom_addr = 0x3d800 + (ascii * 128);
1176   else
1177   {
1178      code_h = (jis & 0xff00) >> 8;
1179      code_l = jis & 0x00ff;
1180      if(code_h < 0x30)
1181      {
1182         rom_addr = ((code_l & 0x1f) << 4)
1183                            | (((code_l - 0x20) & 0x20) << 8)
1184                            | (((code_l - 0x20) & 0x40) << 6)
1185                            | ((code_h & 0x07) << 9);
1186      }
1187      else if(towns_kanji_code_h < 0x70)
1188      {
1189         rom_addr = ((code_l & 0x1f) << 4)
1190                            + (((code_l - 0x20) & 0x60) << 8)
1191                            + ((code_h & 0x0f) << 9)
1192                            + (((code_h - 0x30) & 0x70) * 0xc00)
1193                            + 0x8000;
1194      }
1195      else
1196      {
1197         rom_addr = ((code_l & 0x1f) << 4)
1198                            | (((code_l - 0x20) & 0x20) << 8)
1199                            | (((code_l - 0x20) & 0x40) << 6)
1200                            | ((code_h & 0x07) << 9)
1201                            | 0x38000;
1202      }
1203   }
1204   colour = attr & 0x07;
1205   if(attr & 0x20)
1206      colour |= 0x08;
1207     
1208   for(a=0;a<16;a++)  // for each scanline
1209   {
1210      if((attr & 0xc0) == 0)
1211         data = font_rom[0x180000 + rom_addr + a];
1212      else
1213      {
1214         if((attr & 0xc0) == 0x80)
1215            data = font_rom[0x180000 + rom_addr + (a*2)];
1216         else
1217            data = font_rom[0x180000 + rom_addr + (a*2) + 1];
1218      }
1219     
1220      if(attr & 0x08)
1221         data = ~data;  // inverse
1222     
1223      // and finally, put the data in VRAM
1224      for(b=0;b<8;b+=2)
1225      {
1226         temp = 0;
1227         if(data & (1<<b))
1228            temp |= ((colour & 0x0f) << 4);
1229         if(data & (1<<(b+1)))
1230            temp |= (colour & 0x0f);
1231      }
1232     
1233      vram_addr += linesize;
1234   }
1235}
1236
1237void draw_text_layer(running_machine* machine)
1238{
11541239/*
1155 *  Text layer format
1240 *  Text format
11561241 *  2 bytes per character at both 0xc8000 and 0xca000
11571242 *  0xc8xxx: Byte 1: ASCII character
11581243 *           Byte 2: Attributes
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11651250 *  If either bits 6 or 7 are high, then a fullwidth Kanji character is displayed
11661251 *  at this location.  The character displayed is represented by a 2-byte
11671252 *  JIS code at the same offset at 0xca000.
1253 *
1254 *  The video hardware renders text to VRAM layer 1, there is no separate text layer
11681255 */
1169   int x,y;
1170   UINT8 colour;
1171   UINT32 colourcode;
1172   UINT8 row;  // JIS row number
1173   UINT16 code;
1174   int off = 0;
1256   int x,y,c = 0;
11751257
11761258   for(y=0;y<40;y++)
11771259   {
1178      off = 160 * y;
11791260      for(x=0;x<80;x++)
11801261      {
1181         colour = towns_txtvram[off+1] & 0x07;
1182         if(towns_txtvram[off+1] & 0x20)
1183         {  // Bright
1184            colourcode = (((colour & 0x02) ? 0xfe : 0x00) << 16)
1185               | (((colour & 0x04) ? 0xfe : 0x00) << 8)
1186               | ((colour & 0x01) ? 0xfe : 0x00);
1187         }
1188         else
1189         {
1190            colourcode = (((colour & 0x02) ? 0x7f : 0x00) << 16)
1191               | (((colour & 0x04) ? 0x7f : 0x00) << 8)
1192               | ((colour & 0x01) ? 0x7f : 0x00);
1193         }
1194
1195         if((towns_txtvram[off+1] & 0xc0) != 0)
1196         {   // double width
1197            if(towns_txtvram[off+1] & 0x40)
1198            {
1199               row = (towns_txtvram[off+0x2000] - 32);
1200               code = 0;
1201               if(row <= 8)
1202               {
1203                  code = (row & 0x07) * 0x20;
1204                  code += ((towns_txtvram[off+0x2001]-32) & 0x1f)
1205                        | (((towns_txtvram[off+0x2001]-32) & 0x40) << 2)
1206                        | (((towns_txtvram[off+0x2001]-32) & 0x20) << 4);
1207               }
1208               if(row >= 16)  // Kanji
1209               {
1210                  code = 0x400;
1211                  code += ((towns_txtvram[off+0x2001]) & 0x1f)
1212                        + (((towns_txtvram[off+0x2001]-32) & 0x60) << 4)
1213                        + ((row & 0x0f) << 5)
1214                        + (((row-16) & 0x70) * 0x60);
1215               }
1216               drawgfx_transpen_raw(bitmap,rect,machine->gfx[1],code,
1217                  colourcode,   0,0,towns_crtc_layerscr[0].min_x+(x*8),towns_crtc_layerscr[0].min_y+(y*16),0);
1218            }
1219         }
1220         else
1221         {
1222            drawgfx_transpen_raw(bitmap,rect,machine->gfx[0],towns_txtvram[off],
1223               colourcode,   0,0,towns_crtc_layerscr[0].min_x+(x*8),towns_crtc_layerscr[0].min_y+(y*16),0);
1224         }
1225         off += 2;
1262         render_text_char(machine,x,y,towns_txtvram[c],((towns_txtvram[c+0x2000] << 8)|(towns_txtvram[c+0x2001])),towns_txtvram[c+1]);
1263         c+=2;
12261264      }
12271265   }
12281266}
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12321270   // here we'll clear the vsync signal, I presume it goes low on it's own eventually
12331271   running_device* dev = (running_device*)ptr;
12341272   pic8259_set_irq_line(dev,3,0);  // IRQ11 = VSync
1273   towns_vblank_flag = 0;
12351274}
12361275
12371276INTERRUPT_GEN( towns_vsync_irq )
12381277{
12391278   running_device* dev = devtag_get_device(device->machine,"pic8259_slave");
12401279   pic8259_set_irq_line(dev,3,1);  // IRQ11 = VSync
1280   towns_vblank_flag = 1;
12411281   timer_set(device->machine,video_screen_get_time_until_vblank_end(device->machine->primary_screen),(void*)dev,0,towns_vblank_end);
1282   if(towns_tvram_enable)
1283      draw_text_layer(dev->machine);
12421284   if(towns_sprite_reg[1] & 0x80)  // if sprites are enabled, then sprites are drawn on this layer.
12431285      draw_sprites(dev->machine,&towns_crtc_layerscr[1]);
12441286}
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12671309         towns_crtc_draw_layer(screen->machine,bitmap,&towns_crtc_layerscr[1],1);
12681310   }
12691311
1270   if(!(towns_sprite_reg[1] & 0x80))  // if sprites are not enabled
1271      draw_text_layer(screen->machine,bitmap,cliprect);
1272
12731312#ifdef SPR_DEBUG
12741313   if(input_code_pressed(screen->machine,KEYCODE_O))
12751314      pshift+=0x80;
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12791318#endif
12801319
12811320#ifdef CRTC_REG_DISP
1282   popmessage("CRTC: %i %i %i %i %i %i %i %i %i\n%i %i %i %i | %i %i %i %i\n%i %i %i %i | %i %i %i %i\nZOOM: %04x\nVideo: %02x %02x\nText=%i",
1321   popmessage("CRTC: %i %i %i %i %i %i %i %i %i\n%i %i %i %i | %i %i %i %i\n%i %i %i %i | %i %i %i %i\nZOOM: %04x\nVideo: %02x %02x\nText=%i Spr=%02x",
12831322      towns_crtc_reg[0],towns_crtc_reg[1],towns_crtc_reg[2],towns_crtc_reg[3],
12841323      towns_crtc_reg[4],towns_crtc_reg[5],towns_crtc_reg[6],towns_crtc_reg[7],
12851324      towns_crtc_reg[8],
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12871326      towns_crtc_reg[13],towns_crtc_reg[14],towns_crtc_reg[15],towns_crtc_reg[16],
12881327      towns_crtc_reg[17],towns_crtc_reg[18],towns_crtc_reg[19],towns_crtc_reg[20],
12891328      towns_crtc_reg[21],towns_crtc_reg[22],towns_crtc_reg[23],towns_crtc_reg[24],
1290      towns_crtc_reg[27],towns_video_reg[0],towns_video_reg[1],towns_tvram_enable);
1329      towns_crtc_reg[27],towns_video_reg[0],towns_video_reg[1],towns_tvram_enable,towns_sprite_reg[1] & 0x80);
12911330#endif
12921331
12931332    return 0;
src/mess/drivers/fmtowns.c
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138138UINT32* towns_vram;
139139UINT8* towns_gfxvram;
140140UINT8* towns_txtvram;
141UINT8* towns_sprram;
141//UINT8* towns_sprram;
142142static int towns_selected_drive;
143143static UINT8 towns_fdc_irq6mask;
144144static UINT8* towns_serial_rom;
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19611961   towns_cmos = auto_alloc_array(machine,UINT8,0x2000);
19621962   towns_gfxvram = auto_alloc_array(machine,UINT8,0x80000);
19631963   towns_txtvram = auto_alloc_array(machine,UINT8,0x20000);
1964   towns_sprram = auto_alloc_array(machine,UINT8,0x20000);
1964   //towns_sprram = auto_alloc_array(machine,UINT8,0x20000);
19651965   towns_serial_rom = auto_alloc_array(machine,UINT8,256/8);
19661966   towns_init_serial_rom(machine);
19671967   towns_init_rtc();

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