1 /* Project 16 Source Code~
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2 * Copyright (C) 2012-2017 sparky4 & pngwen & andrius4669 & joncampbell123 & yakui-lover
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4 * This file is part of Project 16.
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6 * Project 16 is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 3 of the License, or
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9 * (at your option) any later version.
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11 * Project 16 is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program. If not, see <http://www.gnu.org/licenses/>, or
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18 * write to the Free Software Foundation, Inc., 51 Franklin Street,
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19 * Fifth Floor, Boston, MA 02110-1301 USA.
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26 #include "src/lib/16_vl.h"
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28 byte far* VGA=(byte far*) 0xA0000000; /* this points to video memory. */
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30 static void fadePalette(sbyte fade, sbyte start, word iter, byte *palette);
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31 static byte tmppal[PAL_SIZE];
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33 /////////////////////////////////////////////////////////////////////////////
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35 // setvideo() - This function Manages the video modes //
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37 /////////////////////////////////////////////////////////////////////////////
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38 void VGAmodeX(sword vq, boolean cmem, global_game_variables_t *gv)
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44 case 0: // deinit the video
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45 // change to the video mode we were in before we switched to mode 13h
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48 in.h.al = gv->video.old_mode;
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49 int86(0x10, &in, &out);
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51 default: // init the video
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52 // get old video mode
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54 //int86(0x10, &in, &out);
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55 gv->video.old_mode = vgaGetMode();//out.h.al;
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57 modexEnter(vq, cmem, gv);
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63 vgaSetMode(byte mode)
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67 regs.h.ah = SET_MODE;
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69 int86(VIDEO_INT, ®s, ®s);
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70 //int10_setmode(mode);
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73 //---------------------------------------------------
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75 // Use the bios to get the current video mode
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78 byte/*FIXME: why long? "long" is 32-bit datatype, VGA modes are 8-bit numbers. */
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81 return int10_getmode();
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84 /* -========================= Entry Points ==========================- */
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85 void modexEnter(sword vq, boolean cmem, global_game_variables_t *gv)
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88 struct vga_mode_params cm;
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91 vgaSetMode(VGA_256_COLOR_MODE);
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92 vga_enable_256color_modex();
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94 update_state_from_vga();
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95 vga_read_crtc_mode(&cm);
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97 /* reprogram the CRT controller */
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98 //outp(CRTC_INDEX, 0x11); /* VSync End reg contains register write prot */
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99 //outp(CRTC_DATA, 0x7f); /* get current write protect on varios regs */
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104 //CRTParmCount = sizeof(ModeX_320x240regs) / sizeof(ModeX_320x240regs[0]);
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105 /*for(i=0; i<CRTParmCount; i++) {
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106 outpw(CRTC_INDEX, ModeX_320x240regs[i]);
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108 /* width and height */
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109 gv->video.page[0].sw = vga_state.vga_width = 320; // VGA lib currently does not update this
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110 gv->video.page[0].sh = vga_state.vga_height = 240; // VGA lib currently does not update this
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111 /* virtual width and height. match screen, at first */
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112 gv->video.page[0].height = gv->video.page[0].sh;
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113 gv->video.page[0].width = gv->video.page[0].sw;
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115 // mode X BYTE mode
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118 // 320x240 mode 60Hz
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119 cm.horizontal_total=0x5f + 5; /* CRTC[0] -5 */
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120 cm.horizontal_display_end=0x4f + 1; /* CRTC[1] -1 */
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121 cm.horizontal_blank_start=0x50 + 1; /* CRTC[2] */
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122 // cm.horizontal_blank_end=0x82 + 1; /* CRTC[3] bit 0-4 & CRTC[5] bit 7 *///skewing ^^;
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123 cm.horizontal_start_retrace=0x54;/* CRTC[4] */
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124 cm.horizontal_end_retrace=0x80; /* CRTC[5] bit 0-4 */
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125 //cm.horizontal_start_delay_after_total=0x3e; /* CRTC[3] bit 5-6 */
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126 //cm.horizontal_start_delay_after_retrace=0x41; /* CRTC[5] bit 5-6 */
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127 cm.vertical_total = 0x20D + 2;
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128 cm.vertical_start_retrace = 0x1EA;
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129 cm.vertical_end_retrace = 0x1EC;
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130 cm.vertical_display_end = 480;
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131 cm.vertical_blank_start = 0x1E7 + 1;
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132 cm.vertical_blank_end = 0x206 + 1;
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133 cm.clock_select = 0; /* misc register = 0xE3 25MHz */
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136 cm.offset = (vga_state.vga_width / (4 * 2)); // 320 wide (40 x 4 pixel groups x 2)
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138 case 2: // TODO: 160x120 according to ModeX_160x120regs
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140 case 3: // TODO: 160x120 according to ModeX_320x200regs
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142 case 4: // TODO: 160x120 according to ModeX_192x144regs
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144 case 5: // TODO: 160x120 according to ModeX_256x192regs
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150 vga_state.vga_stride = cm.offset * 2;
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151 vga_write_crtc_mode(&cm,0);
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153 /* clear video memory */
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157 /* clear video memory */
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158 dword far*ptr=(dword far*)vga_state.vga_graphics_ram;//VGA; /* used for faster screen clearing */
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159 vga_write_sequencer(2/*map mask register*/,0xf/*all 4 planes*/);
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160 for(i = 0;i < 0x4000; i++) ptr[i] = 0x0000; // 0x4000 x dword = 64KB
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161 /* fix up the palette and everything */
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162 modexPalBlack(); //reset the palette~
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170 /* VGAmodeX restores original mode and palette */
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171 vgaSetMode(TEXT_MODE);
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175 modexDefaultPage(page_t *p)
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179 /* default page values */
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181 //page.data = (byte far *)(vga_state.vga_graphics_ram);
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182 page.data = (vga_state.vga_graphics_ram);
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187 page.width = p->sw+TILEWHD;
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188 page.height = p->sh+TILEWHD;
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189 page.ti.tw = page.sw/TILEWH;
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190 page.ti.th = page.sh/TILEWH;
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191 page.ti.tilesw=page.width/TILEWH;
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192 page.ti.tilesh=page.height/TILEWH;
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193 page.ti.tilemidposscreenx = page.ti.tw/2;
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194 page.ti.tilemidposscreeny = (page.ti.th/2)+1;
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195 page.stridew=page.width/4;
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196 page.pagesize = (word)(page.stridew)*page.height;
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197 page.pi=page.width*4;
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203 /* returns the next page in contiguous memory
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204 * the next page will be the same size as p, by default
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207 modexNextPage(page_t *p) {
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210 result.data = p->data + (p->pagesize);
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211 result.dx = p->dx; // not used anymore we use page[0].dx
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212 result.dy = p->dy; // not used anymore we use page[0].dy
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215 result.width = p->width;
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216 result.height = p->height;
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217 result.ti.tw = p->ti.tw;
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218 result.ti.th = p->ti.th;
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219 result.ti.tilesw = p->ti.tilesw;
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220 result.ti.tilesh = p->ti.tilesh;
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221 result.stridew=p->stridew;
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222 result.pagesize = p->pagesize;
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223 result.pi=result.width*4;
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224 result.id = p->id+1;
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229 //next page with defined dimentions~
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231 modexNextPageFlexibleSize(page_t *p, word x, word y)
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235 result.data = p->data + (p->pagesize); /* compute the offset */
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236 result.dx = 0; // not used anymore we use page[0].dx
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237 result.dy = 0; // not used anymore we use page[0].dy
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242 result.ti.tw = result.sw/TILEWH;
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243 result.ti.th = result.sh/TILEWH;
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244 result.ti.tilesw=result.width/TILEWH;
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245 result.ti.tilesh=result.height/TILEWH;
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246 result.id = p->id+1;
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247 result.stridew=result.width/4;//p->sw/4;
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248 result.pagesize = (word)(result.stridew)*result.height;
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249 /* switch(result.id)
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252 result.pi=p->width*4;
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258 result.pi=result.width*4;
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263 void modexCalcVmemRemain(video_t *video)
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266 //printf("\n\n 1st vmem_remain=%u\n", video->vmem_remain);
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267 for(i=0; i<video->num_of_pages; i++)
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269 video->vmem_remain-=video->page[i].pagesize;
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270 //printf(" [%u], video->page[%u].pagesize=%u\n", i, i, video->page[i].pagesize);
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271 //printf(" [%u], vmem_remain=%u\n", i, video->vmem_remain);
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275 void VL_Initofs(video_t *video)
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279 video->ofs.offscreen_ofs = video->page[0].pagesize+video->page[1].pagesize;//(vga_state.vga_stride * vga_state.vga_height);
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280 video->ofs.pattern_ofs = (uint16_t)video->page[2].data;
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282 video->ofs.offscreen_ofs = 0;
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283 video->ofs.pattern_ofs = 0;//(uint16_t)video->page[0].data;
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287 void modexHiganbanaPageSetup(video_t *video)
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289 video->vmem_remain=65535U;
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290 video->num_of_pages=0;
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291 (video->page[0]) = modexDefaultPage(&(video->page[0])); video->num_of_pages++; //video->page[0].width += (TILEWHD); video->page[0].height += (TILEWHD);
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292 (video->page[1]) = modexNextPage(&(video->page[0])); video->num_of_pages++;
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293 //0000 (video->page[2]) = modexNextPageFlexibleSize(&(video->page[1]), (video->page[0]).width, TILEWH*4); video->num_of_pages++;
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294 //0000 (video->page[3]) = (video->page[2]); video->num_of_pages++;
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295 //// (video->page[2]) = modexNextPageFlexibleSize(&(video->page[1]), TILEWH*4, TILEWH*4); video->num_of_pages++;
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296 //// (video->page[3]) = modexNextPageFlexibleSize(&(video->page[2]), video->page[0].sw, 208); video->num_of_pages++;
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297 (video->page[2]) = modexNextPageFlexibleSize(&(video->page[1]), video->page[0].width, 96); video->num_of_pages++;
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298 (video->page[3]) = modexNextPageFlexibleSize(&(video->page[2]), video->page[0].width, 96); video->num_of_pages++;
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299 modexCalcVmemRemain(video);
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301 video->sp=video->p = 0; //showpage
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302 video->dorender = 1; //render
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303 video->vh=video->page[0].height+video->page[1].height+video->page[2].height+video->page[3].height;
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307 video->omemptr= vga_state.vga_graphics_ram;
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308 video->vga_draw_stride= vga_state.vga_draw_stride;
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309 video->vga_draw_stride_limit= vga_state.vga_draw_stride_limit;
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310 //sprite render switch and bgpreservation switch
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314 //setup the buffersize
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315 video->page[0].dx=video->page[0].dy=
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316 video->page[1].dx=video->page[1].dy=TILEWH; // 1 tile size buffer
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317 video->page[2].dx=video->page[2].dy=
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318 video->page[3].dx=video->page[3].dy=0; // cache pages are buffer wwww
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322 // move page to appropriate part and show it
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325 modexShowPage(page_t *page) {
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326 word high_address, low_address, offset;
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329 /* calculate offset */
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330 offset = (word) page->data;
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331 offset += page[0].dy * (page->width >> 2 );
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332 offset += page[0].dx >> 2;
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334 /* calculate crtcOffset according to virtual width */
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335 crtcOffset = page->width >> 3;
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337 high_address = HIGH_ADDRESS | (offset & 0xff00);
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338 low_address = LOW_ADDRESS | (offset << 8);
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340 /* wait for appropriate timing and then program CRTC */
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341 //+=+= while ((inp(INPUT_STATUS_1) & DISPLAY_ENABLE));
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342 outpw(CRTC_INDEX, high_address);
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343 outpw(CRTC_INDEX, low_address);
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344 outp(CRTC_INDEX, 0x13);
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345 outp(CRTC_DATA, crtcOffset);
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347 /* wait for one retrace */
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348 //+=+= while (!(inp(INPUT_STATUS_1) & VRETRACE));
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350 /* do PEL panning here */
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351 outp(AC_INDEX, 0x33);
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352 outp(AC_INDEX, (page[0].dx & 0x03) << 1);
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355 //args: page, vertical sync switch, screen resolution switch, page0 switch
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357 VL_ShowPage(page_t *page, boolean vsync, boolean sr) {
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358 word high_address, low_address, offset;
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361 // calculate offset
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362 offset = (word) page->data;
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363 offset += page->dy * (page->width >> 2 );
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364 offset += page->dx >> 2;
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366 // calculate crtcOffset according to virtual width
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370 crtcOffset = page->sw >> 3;
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374 crtcOffset = page->width >> 3;
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378 high_address = HIGH_ADDRESS | (offset & 0xff00);
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379 low_address = LOW_ADDRESS | (offset << 8);
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381 // wait for appropriate timing and then program CRTC
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382 if(vsync) while ((inp(INPUT_STATUS_1) & DISPLAY_ENABLE));
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383 outpw(CRTC_INDEX, high_address);
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384 outpw(CRTC_INDEX, low_address);
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385 outp(CRTC_INDEX, 0x13);
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386 outp(CRTC_DATA, crtcOffset);
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388 // wait for one retrace
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389 if(vsync) while (!(inp(INPUT_STATUS_1) & VRETRACE));
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391 // do PEL panning here
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392 outp(AC_INDEX, 0x33);
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393 outp(AC_INDEX, (page->dx & 0x03) << 1);
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394 vga_state.vga_graphics_ram = (VGA_RAM_PTR)page->data;
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397 //=============================================================================
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400 modexPanPage(page_t *page, int dx, int dy) {
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406 modexSelectPlane(byte plane) {
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407 outp(SC_INDEX, MAP_MASK); /* select plane */
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408 outp(SC_DATA, plane);
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412 modexClearRegion(page_t *page, int x, int y, int w, int h, byte color) {
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413 word pageOff = (word) page->data;
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414 word xoff=x/4; /* xoffset that begins each row */
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415 word scanCount=w/4; /* number of iterations per row (excluding right clip)*/
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416 word poffset = pageOff + y*(page->stridew) + xoff; /* starting offset */
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417 word nextRow = page->stridew-scanCount-1; /* loc of next row */
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418 byte lclip[] = {0x0f, 0x0e, 0x0c, 0x08}; /* clips for rectangles not on 4s */
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419 byte rclip[] = {0x00, 0x01, 0x03, 0x07};
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420 byte left = lclip[x&0x03];
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421 byte right = rclip[(x+w)&0x03];
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423 /* handle the case which requires an extra group */
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424 if((x & 0x03) && !((x+w) & 0x03)) {
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428 //printf("modexClearRegion(x=%u, y=%u, w=%u, h=%u, left=%u, right=%u)\n", x, y, w, h, left, right);
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439 MOV AX, SCREEN_SEG ; go to the VGA memory
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441 MOV DI, poffset ; go to the first pixel
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442 MOV DX, SC_INDEX ; point to the map mask
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446 MOV AL, color ; get ready to write colors
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448 MOV CX, scanCount ; count the line
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449 MOV BL, AL ; remember color
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450 MOV AL, left ; do the left clip
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451 OUT DX, AL ; set the left clip
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452 MOV AL, BL ; restore color
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453 STOSB ; write the color
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455 JZ SCAN_DONE ; handle 1 group stuff
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457 ;-- write the main body of the scanline
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458 MOV BL, AL ; remember color
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459 MOV AL, 0x0f ; write to all pixels
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461 MOV AL, BL ; restore color
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462 REP STOSB ; write the color
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464 MOV BL, AL ; remeber color
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466 OUT DX, AL ; do the right clip
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467 MOV AL, BL ; restore color
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468 STOSB ; write pixel
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469 ADD DI, nextRow ; go to the next row
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483 /* moved to src/lib/modex16/16render.c */
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485 /* copy a region of video memory from one page to another.
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486 * It assumes that the left edge of the tile is the same on both
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487 * regions and the memory areas do not overlap.
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490 modexCopyPageRegion(page_t *dest, page_t *src,
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493 word width, word height)
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495 word doffset = (word)dest->data + dy*(dest->stridew) + dx/4;
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496 word soffset = (word)src->data + sy*(src->stridew) + sx/4;
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497 word scans = vga_state.vga_stride; //++++0000 the quick and dirty fix of the major issue with p16 video display wwww
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498 word nextSrcRow = src->stridew - scans - 1;
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499 word nextDestRow = dest->stridew - scans - 1;
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500 byte lclip[] = {0x0f, 0x0e, 0x0c, 0x08}; /* clips for rectangles not on 4s */
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501 byte rclip[] = {0x00, 0x01, 0x03, 0x07};
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502 byte left = lclip[sx&0x03];
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503 byte right = rclip[(sx+width)&0x03];
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505 /* handle the case which requires an extra group */
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506 if((sx & 0x03) && !((sx+width) & 0x03)) {
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510 // printf("modexCopyPageRegion(src->stridew=%u, dest->stridew=%u, sx=%u, sy=%u, dx=%u, dy=%u, width=%u, height=%u, left=%u, right=%u)\n", src->stridew, dest->stridew, sx, sy, dx, dy, width, height, left, right);
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522 MOV AX, SCREEN_SEG ; work in the vga space
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527 MOV DX, GC_INDEX ; turn off cpu bits
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531 MOV AX, SC_INDEX ; point to the mask register
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541 MOV CX, scans ; the number of latches
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543 MOV AL, left ; do the left column
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548 MOV AL, 0fh ; do the inner columns
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550 REP MOVSB ; copy the pixels
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552 MOV AL, right ; do the right column
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557 MOV AX, SI ; go the start of the next row
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558 ADD AX, nextSrcRow ;
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561 ADD AX, nextDestRow ;
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564 DEC height ; do the rest of the actions
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567 MOV DX, GC_INDEX+1 ; go back to CPU data
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568 MOV AL, 0ffh ; none from latches
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583 /* fade and flash */
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585 modexFadeOn(word fade, byte *palette) {
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586 fadePalette(-fade, 64, 64/fade+1, palette);
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591 modexFadeOff(word fade, byte *palette) {
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592 fadePalette(fade, 0, 64/fade+1, palette);
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597 modexFlashOn(word fade, byte *palette) {
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598 fadePalette(fade, -64, 64/fade+1, palette);
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603 modexFlashOff(word fade, byte *palette) {
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604 fadePalette(-fade, 0, 64/fade+1, palette);
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609 fadePalette(sbyte fade, sbyte start, word iter, byte *palette) {
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613 /* handle the case where we just update */
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615 modexPalUpdate(palette);
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619 while(iter > 0) { /* FadeLoop */
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620 for(i=0; i<PAL_SIZE; i++) { /* loadpal_loop */
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621 tmppal[i] = palette[i] - dim;
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622 if(tmppal[i] > 127) {
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624 } else if(tmppal[i] > 63) {
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628 modexPalUpdate(tmppal);
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635 /* save and load */
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637 modexPalSave(byte *palette) {
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640 outp(PAL_READ_REG, 0); /* start at palette entry 0 */
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641 for(i=0; i<PAL_SIZE; i++) {
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642 palette[i] = inp(PAL_DATA_REG); /* read the palette data */
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650 ptr = malloc(PAL_SIZE);
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652 /* handle errors */
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654 printf("Could not allocate palette.\n");
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662 modexLoadPalFile(byte *filename, byte **palette) {
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666 /* free the palette if it exists */
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671 /* allocate the new palette */
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672 *palette = modexNewPal();
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674 /* open the file */
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675 file = fopen(filename, "rb");
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677 printf("Could not open palette file: %s\n", filename);
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680 /* read the file */
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682 while(!feof(file)) {
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683 *ptr++ = fgetc(file);
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690 void VL_LoadPalFile(const char *filename, byte *palette)
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694 fd = open(filename,O_RDONLY|O_BINARY);
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698 read(fd,palette, PAL_SIZE);
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701 vga_palette_lseek(0);
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702 for (i=0;i < 256;i++) vga_palette_write(palette[(i*3)+0]>>2,palette[(i*3)+1]>>2,palette[(i*3)+2]>>2);
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706 void VL_LoadPalFilewithoffset(const char *filename, byte *palette, word o)
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710 fd = open(filename,O_RDONLY|O_BINARY);
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714 read(fd,palette, PAL_SIZE);
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717 vga_palette_lseek(o);
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718 for (i=o;i < 256-o;i++) vga_palette_write(palette[(i*3)+0]>>2,palette[(i*3)+1]>>2,palette[(i*3)+2]>>2);
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724 modexSavePalFile(char *filename, byte *pal) {
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728 /* open the file for writing */
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729 file = fopen(filename, "wb");
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731 printf("Could not open %s for writing\n", filename);
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734 /* write the data to the file */
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735 fwrite(pal, 1, PAL_SIZE, file);
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743 fadePalette(-1, 64, 1, tmppal);
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749 fadePalette(-1, -64, 1, tmppal);
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754 //moved to 16_vlpal.c
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757 modexPalUpdate(byte *p)
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760 //modexWaitBorder();
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761 vga_wait_for_vsync();
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762 outp(PAL_WRITE_REG, 0); /* start at the beginning of palette */
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763 for(i=0; i<PAL_SIZE/2; i++)
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765 outp(PAL_DATA_REG, p[i]);
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767 //modexWaitBorder(); /* waits one retrace -- less flicker */
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768 vga_wait_for_vsync();
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769 for(; i<PAL_SIZE; i++)
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771 outp(PAL_DATA_REG, p[(i)]);
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776 modexPalUpdate0(byte *p)
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779 //modexWaitBorder();
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780 vga_wait_for_vsync();
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781 outp(PAL_WRITE_REG, 0); /* start at the beginning of palette */
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782 for(i=0; i<PAL_SIZE/2; i++)
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784 outp(PAL_DATA_REG, rand());
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786 //modexWaitBorder(); /* waits one retrace -- less flicker */
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787 vga_wait_for_vsync();
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788 for(; i<PAL_SIZE; i++)
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790 outp(PAL_DATA_REG, rand());
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795 modexPalOverscan(word col)
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797 //modexWaitBorder();
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798 vga_wait_for_vsync();
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799 outp(PAL_WRITE_REG, 0); /* start at the beginning of palette */
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800 outp(PAL_DATA_REG, col);
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803 void modexputPixel(page_t *page, int x, int y, byte color)
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805 word pageOff = (word) page->data;
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806 /* Each address accesses four neighboring pixels, so set
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807 Write Plane Enable according to which pixel we want
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808 to modify. The plane is determined by the two least
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809 significant bits of the x-coordinate: */
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810 modexSelectPlane(PLANE(x));
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811 //outp(SC_INDEX, 0x02);
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812 //outp(SC_DATA, 0x01 << (x & 3));
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814 /* The offset of the pixel into the video segment is
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815 offset = (width * y + x) / 4, and write the given
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816 color to the plane we selected above. Heed the active
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817 page start selection. */
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818 VGA[(unsigned)((page->width/4) * y) + (x / 4) + pageOff] = color;
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822 byte modexgetPixel(page_t *page, int x, int y)
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824 word pageOff = (word) page->data;
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825 /* Select the plane from which we must read the pixel color: */
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826 outpw(GC_INDEX, 0x04);
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827 outpw(GC_INDEX+1, x & 3);
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829 return VGA[(unsigned)((page->width/4) * y) + (x / 4) + pageOff];
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833 void modexDrawChar(page_t *page, int x/*for planar selection only*/, word t, word col, word bgcol, word addr)
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835 /* vertical drawing routine by joncampbell123.
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837 * optimize for VGA mode X planar memory to minimize the number of times we do I/O write to map mask register.
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838 * so, we enumerate over columns (not rows!) to draw every 4th pixel. bit masks are used because of the font bitmap.
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840 * NTS: addr defines what VGA memory address we use, "x" is redundant except to specify which of the 4 pixels we select in the map mask register. */
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841 word rows = romFonts[t].charSize;
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849 m1 = 0x80; // left half
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850 m2 = 0x08; // right half
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851 for (colm=0;colm < 4;colm++) {
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853 modexSelectPlane(PLANE(plane));
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854 for (row=0;row < rows;row++) {
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855 fontbyte = romFontsData.l[row];
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856 vga_state.vga_graphics_ram[drawaddr ] = (fontbyte & m1) ? col : bgcol;
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857 vga_state.vga_graphics_ram[drawaddr+1] = (fontbyte & m2) ? col : bgcol;
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858 drawaddr += page->width >> 2;
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863 if ((++plane) == 4) {
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870 void modexprint(page_t *page, word x, word y, word t, word col, word bgcol, const byte *str)
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874 //word addr = (word) romFontsData.l;
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875 word addrq = (page->stridew) * y + (x / 4) + ((word)page->data);
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876 word addrr = addrq;
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881 w=romFonts[t].charSize;
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882 romFontsData.chw=0;
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884 for(; *str != '\0'; str++)
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890 romFontsData.chw = 0;
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891 addrq += (page->stridew) * 8;
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897 // load the character into romFontsData.l
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898 // no need for inline assembly!
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899 // NTS: It might even be faster to just let the modexDrawChar point directly at ROM font than to copy per char! --J.C.
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900 _fmemcpy(romFontsData.l,MK_FP(s,o+(w*c))/*ROM font location*/,w/*char size*/);
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901 modexDrawChar(page, x_draw/*for mode X planar use*/, t, col, bgcol, addrr);
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902 x_draw += 8; /* track X for edge of screen */
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903 addrr += 2; /* move 8 pixels over (2 x 4 planar pixels per byte) */
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907 void modexprintbig(page_t *page, word x, word y, word t, word col, word bgcol, const byte *str)
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909 word i, s, o, w, j, xp;
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911 word addr = (word) l;
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938 for(; *str != '\0'; str++)
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941 if((c=='\n'/* || c=="\
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942 "*/)/* || chw>=page->width*/)
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948 //load the letter 'A'
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963 MOV AL, c ; the letter
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966 ADD SI, AX ;the address of charcter
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990 //modexputPixel(page, x+xp+chw, y+i, l[i] & j ? col:bgcol);
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991 modexClearRegion(page, (x+xp+chw)*8, (y+i)*8, 8, 8, l[i] & j ? col:bgcol);
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1000 /* palette dump on display! */
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1001 void modexpdump(page_t *pee)
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1003 int mult=(QUADWH);
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1004 int palq=(mult)*TILEWH;
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1007 for(paly=0; paly<palq; paly+=mult){
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1008 for(palx=0; palx<palq; palx+=mult){
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1009 modexClearRegion(pee, palx+TILEWH, paly+TILEWH, mult, mult, palcol);
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1015 /////////////////////////////////////////////////////////////////////////////
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1017 // cls() - This clears the screen to the specified color, on the VGA or on //
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1018 // the Virtual screen. //
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1020 /////////////////////////////////////////////////////////////////////////////
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1021 void modexcls(page_t *page, byte color, byte *Where)
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1023 //modexClearRegion(page, 0, 0, page->width, page->height, color);
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1024 /* set map mask to all 4 planes */
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1025 outpw(SC_INDEX, 0xff02);
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1026 //_fmemset(VGA, color, 16000);
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1027 _fmemset(Where, color, page->stridew*page->height);
\r
1031 // pattern filler from joncampbell123's code
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1033 void VL_PatternDraw(video_t *video, word pn, boolean sw, boolean allsw)
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1035 unsigned int i,j,o, d,h,s;
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1041 w=vga_state.vga_width;
\r
1043 s=vga_state.vga_stride;
\r
1047 h=vga_state.vga_height;
\r
1055 w=video->page[pn].width;
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1056 d=(0x10000UL - (uint16_t)video->page[pn].data);
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1057 s=video->page[pn].stridew;
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1061 h=video->page[pn].height;
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1064 if(!pn) h=video->vh;
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1065 else h=video->page[pn].height;
\r
1071 /* fill screen/pattern with a distinctive pattern */
\r
1072 for (i=0;i < w;i++) {
\r
1074 vga_write_sequencer(0x02/*map mask*/,1 << (i&3));
\r
1075 for (j=0;j < h;j++,o += s)
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1076 vga_state.vga_graphics_ram[o] = (i^j)&15; // VRL samples put all colors in first 15!
\r
1081 modexWaitBorder() {
\r
1082 while(inp(INPUT_STATUS_1) & 8) {
\r
1086 while(!(inp(INPUT_STATUS_1) & 8)) {
\r
1092 modexWaitBorder_start()
\r
1094 while(inp(INPUT_STATUS_1) & 8) {
\r
1101 modexWaitBorder_end()
\r
1103 while(!(inp(INPUT_STATUS_1) & 8)) {
\r
1110 // printings of video memory information
\r
1112 void VL_PrintmodexmemInfo(video_t *v)
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1116 // printf("========================================\n");
\r
1117 printf("VL_PrintmodexmemInfo:\n");
\r
1118 // printf("========================================\n");
\r
1119 printf(" Virtual Screen: %dx", v->page[0].width); printf("%d ", v->page[0].height); printf("Tile: %dx", v->page[0].ti.tilesw); printf("%d", v->page[0].ti.tilesh); printf("=((Virtual Screen)/16)\n");
\r
1120 printf(" Screen: %dx", v->page[0].sw); printf("%d ", v->page[0].sh); printf("Tile: %dx", v->page[0].ti.tw); printf("%d", v->page[0].ti.th); printf("=((Screen)/16)\n");
\r
1122 printf(" Free Video Memory: %u\n", v->vmem_remain);
\r
1124 for(i=0; i<v->num_of_pages;i++)
\r
1126 printf(" [%u]=", i);
\r
1127 printf("(%Fp)", (v->page[i].data));
\r
1128 printf(" size=%u ", v->page[i].pagesize);
\r
1129 printf("w=%-3lu h=%-3lu ", (unsigned long)v->page[i].width, (unsigned long)v->page[i].height);
\r
1130 printf("sw=%-3lu sh=%-3lu ", (unsigned long)v->page[i].sw, (unsigned long)v->page[i].sh);
\r
1131 printf("pi=%u", v->page[i].pi);
\r