X-Git-Url: http://4ch.mooo.com/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fmodex16.c;h=90005d7ecb0d125fcb96b7627a82c7707bb14483;hb=60d62fcab6d8310dc1ab11b40906e9a59e4c9c6a;hp=9d130a3b79ae6e807d02d541a106fddfba9e2da8;hpb=d280f25c9633d068fd3e106f2418e59ace6da2f1;p=16.git

diff --git a/src/lib/modex16.c b/src/lib/modex16.c
index 9d130a3b..90005d7e 100755
--- a/src/lib/modex16.c
+++ b/src/lib/modex16.c
@@ -29,7 +29,6 @@ byte far* VGA=(byte far*) 0xA0000000;   /* this points to video memory. */
 
 static void fadePalette(sbyte fade, sbyte start, word iter, byte *palette);
 static byte tmppal[PAL_SIZE];
-//int old_mode;
 
 /////////////////////////////////////////////////////////////////////////////
 //																														//
@@ -40,23 +39,23 @@ void VGAmodeX(sword vq, global_game_variables_t *gv)
 {
 	union REGS in, out;
 
-	if(!vq)
-	{ // deinit the video
-		// change to the video mode we were in before we switched to mode 13h
-		modexLeave();
-		in.h.ah = 0x00;
-		in.h.al = gv->old_mode;
-		int86(0x10, &in, &out);
-
-	}
-	else if(vq==1)
-	{ // init the video
-		// get old video mode
-		in.h.ah = 0xf;
-		int86(0x10, &in, &out);
-		gv->old_mode = out.h.al;
-		// enter mode
-		modexEnter();
+	switch (vq)
+	{
+		case 0: // deinit the video
+			// change to the video mode we were in before we switched to mode 13h
+			modexLeave();
+			in.h.ah = 0x00;
+			in.h.al = gv->video.old_mode;
+			int86(0x10, &in, &out);
+		break;
+		default: // init the video
+			// get old video mode
+			//in.h.ah = 0xf;
+			//int86(0x10, &in, &out);
+			gv->video.old_mode = vgaGetMode();//out.h.al;
+			// enter mode
+			modexEnter(vq, gv);
+		break;
 	}
 }
 
@@ -70,58 +69,74 @@ vgaSetMode(byte mode)
   int86(VIDEO_INT, &regs, &regs);
 }
 
+//---------------------------------------------------
+//
+// Use the bios to get the current video mode
+//
+
+long
+vgaGetMode()
+{
+    union REGS rg;
+
+    rg.h.ah = 0x0f;
+    int86(VIDEO_INT, &rg, &rg);
+
+    return rg.h.al;
+}
 
 /* -========================= Entry  Points ==========================- */
 void
-modexEnter() {
-    word i;
-    dword far*ptr=(dword far*)VGA;      /* used for faster screen clearing */
-    word CRTParms[] = {
-        0x0d06,         /* vertical total */
-        0x3e07,         /* overflow (bit 8 of vertical counts) */
-        0x4109,         /* cell height (2 to double-scan */
-        0xea10,         /* v sync start */
-        0xac11,         /* v sync end and protect cr0-cr7 */
-        0xdf12,         /* vertical displayed */
-	0x2013,		/* offset/logical width */
-        0x0014,         /* turn off dword mode */
-        0xe715,         /* v blank start */
-        0x0616,         /* v blank end */
-        0xe317          /* turn on byte mode */
-    };
-    int CRTParmCount = sizeof(CRTParms) / sizeof(CRTParms[0]);
-
-    /* TODO save current video mode and palette */
-    vgaSetMode(VGA_256_COLOR_MODE);
-
-    /* disable chain4 mode */
-    outpw(SC_INDEX, 0x0604);
-
-    /* synchronous reset while setting Misc Output */
-    outpw(SC_INDEX, 0x0100);
-
-    /* select 25 MHz dot clock & 60 Hz scanning rate */
-    outp(MISC_OUTPUT, 0xe3);
-
-    /* undo reset (restart sequencer) */
-    outpw(SC_INDEX, 0x0300);
-
-    /* reprogram the CRT controller */
-    outp(CRTC_INDEX, 0x11); /* VSync End reg contains register write prot */
-    outp(CRTC_DATA, 0x7f);  /* get current write protect on varios regs */
-
-    /* send the CRTParms */
-    for(i=0; i<CRTParmCount; i++) {
-        outpw(CRTC_INDEX, CRTParms[i]);
-    }
+modexEnter(sword vq, global_game_variables_t *gv)
+{
+	word i;
+	dword far*ptr=(dword far*)VGA;      /* used for faster screen clearing */
+	int CRTParmCount;
+	/* common mode X initiation stuff~ */
+	modexsetBaseXMode(gv->video.page);
 
-    /* clear video memory */
-    outpw(SC_INDEX, 0x0f02);
-    for(i=0; i<0x8000; i++) {
-        ptr[i] = 0x0000;
-    }
-}
+	switch(vq)
+	{
+		case 0:
+			CRTParmCount = sizeof(ModeX_320x240regs) / sizeof(ModeX_320x240regs[0]);
+			/* width and height */
+			gv->video.page->sw=320;
+			gv->video.page->sh=240;
+			gv->video.page->tilesw = gv->video.page->sw/TILEWH;
+			gv->video.page->tilesh = gv->video.page->sh/TILEWH;
+			//TODO MAKE FLEXIBLE~
+			gv->video.page->tilemidposscreenx = 10;
+			gv->video.page->tilemidposscreeny = 8;
+
+			/* send the CRTParms */
+			for(i=0; i<CRTParmCount; i++) {
+				outpw(CRTC_INDEX, ModeX_320x240regs[i]);
+			}
 
+			/* clear video memory */
+			outpw(SC_INDEX, 0x0f02);
+			for(i=0; i<0x8000; i++) {
+				ptr[i] = 0x0000;
+			}
+		break;
+		case 1:
+			CRTParmCount = sizeof(ModeX_192x144regs) / sizeof(ModeX_192x144regs[0]);
+			/* width and height */
+			//TODO add width and height of screen
+
+			/* send the CRTParms */
+			for(i=0; i<CRTParmCount; i++) {
+				outpw(CRTC_INDEX, ModeX_192x144regs[i]);
+			}
+
+			/* clear video memory */
+			outpw(SC_INDEX, 0x0f02);
+			for(i=0; i<0x8000; i++) {
+				ptr[i] = 0x0000;
+			}
+		break;
+	}
+}
 
 void
 modexLeave() {
@@ -129,6 +144,36 @@ modexLeave() {
     vgaSetMode(TEXT_MODE);
 }
 
+//    setBaseXMode() does the initialization to make the VGA ready to
+//    accept any combination of configuration register settings.  This
+//    involves enabling writes to index 0 to 7 of the CRT controller (port
+//    0x3D4), by clearing the most significant bit (bit 7) of index 0x11.
+void
+modexsetBaseXMode(page_t *page)
+{
+	word temp;
+	/* TODO save current video mode and palette */
+	vgaSetMode(VGA_256_COLOR_MODE);
+
+	/* disable chain4 mode */
+	outpw(SC_INDEX, 0x0604);
+
+	/* synchronous reset while setting Misc Output */
+	outpw(SC_INDEX, 0x0100);
+
+	/* select 25 MHz dot clock & 60 Hz scanning rate */
+	outp(MISC_OUTPUT, 0xe3);
+
+	/* undo reset (restart sequencer) */
+	outpw(SC_INDEX, 0x0300);
+
+	/* reprogram the CRT controller */
+	outp(CRTC_INDEX, 0x11); /* VSync End reg contains register write prot */
+	temp = inp(CRTC_DATA) & 0x7F;
+	outp(CRTC_INDEX, 0x11);
+//	outp(CRTC_DATA, 0x7f);  /* get current write protect on varios regs */
+	outp(CRTC_DATA, temp);  /* get current write protect on varios regs */
+}
 
 page_t
 modexDefaultPage() {
@@ -138,8 +183,8 @@ modexDefaultPage() {
     page.data = VGA;
     page.dx = 0;
     page.dy = 0;
-    page.width = SCREEN_WIDTH;
-    page.height = SCREEN_HEIGHT;
+	page.width = SCREEN_WIDTH;
+	page.height = SCREEN_HEIGHT;
 	page.tw = page.width/TILEWH;
 	page.th = page.height/TILEWH;
 	page.id = 0;
@@ -1262,6 +1307,21 @@ void modexprintbig(page_t *page, word x, word y, word t, word col, word bgcol, c
 	}
 }
 
+/* palette dump on display! */
+void pdump(page_t *pee)
+{
+	int mult=(QUADWH);
+	int palq=(mult)*TILEWH;
+	int palcol=0;
+	int palx, paly;
+	for(paly=0; paly<palq; paly+=mult){
+		for(palx=0; palx<palq; palx+=mult){
+				modexClearRegion(pee, palx+TILEWH, paly+TILEWH, mult, mult, palcol);
+			palcol++;
+		}
+	}
+}
+
 /////////////////////////////////////////////////////////////////////////////
 //																		 //
 // cls() - This clears the screen to the specified color, on the VGA or on //