gfx chip faker, hint vector

git-svn-id: file:///home/notaz/opt/svn/PicoDrive@20 be3aeb3a-fb24-0410-a615-afba39da0efa

Pico/PicoInt.h

@@ -161,6 +161,7 @@ struct PicoSRAM
 // MCD
 #include "cd/cd_sys.h"
 #include "cd/LC89510.h"
+#include "cd/gfx_cd.h"
 
 struct mcd_misc
 {
@@ -183,6 +184,7 @@ typedef struct
 	CDD  cdd;
 	CDC  cdc;
 	_scd scd;
+	Rot_Comp rot_comp;
 	struct mcd_misc m;
 } mcd_state;
 

Pico/cd/Memory.c

@@ -24,8 +24,8 @@ typedef unsigned int   u32;
 
 //#define __debug_io
 //#define __debug_io2
-#define rdprintf dprintf
+//#define rdprintf dprintf
-//#define rdprintf(...)
+#define rdprintf(...)
 
 // -----------------------------------------------------------------
 
@@ -61,7 +61,7 @@ static u32 m68k_reg_read16(u32 a)
       dprintf("m68k reserved read");
       goto end;
     case 0xC:
-      dprintf("m68k stopwatch read");
+      dprintf("m68k stopwatch timer read");
       break;
   }
 
@@ -118,9 +118,11 @@ static void m68k_reg_write8(u32 a, u32 d)
       return;
     case 6:
       *((char *)&Pico_mcd->m.hint_vector+1) = d;
+      Pico_mcd->bios[0x72 + 1] = d; // simple hint vector changer
       return;
     case 7:
       *(char *)&Pico_mcd->m.hint_vector = d;
+      Pico_mcd->bios[0x72] = d;
       return;
     case 0xe:
       //dprintf("m68k: comm flag: %02x", d);
@@ -162,7 +164,10 @@ static u32 s68k_reg_read16(u32 a)
       d = Read_CDC_Host(1); // Gens returns 0 here on byte reads
       goto end;
     case 0xC:
-      dprintf("s68k stopwatch read");
+      dprintf("s68k stopwatch timer read");
+      break;
+    case 0x30:
+      dprintf("s68k int3 timer read");
       break;
     case 0x34: // fader
       d = 0; // no busy bit
@@ -210,6 +215,12 @@ static void s68k_reg_write8(u32 a, u32 d)
     case 0xa:
       dprintf("s68k set CDC dma addr");
       break;
+    case 0xc:
+      dprintf("s68k set stopwatch timer");
+      break;
+    case 0x31:
+      dprintf("s68k set int3 timer");
+      break;
     case 0x33: // IRQ mask
       dprintf("s68k irq mask: %02x", d);
       if ((d&(1<<4)) && (Pico_mcd->s68k_regs[0x37]&4) && !(Pico_mcd->s68k_regs[0x33]&(1<<4))) {

Pico/cd/Pico.c

@@ -32,6 +32,7 @@ int PicoResetMCD(int hard)
 {
   // clear everything except BIOS
   memset(Pico_mcd->prg_ram, 0, sizeof(mcd_state) - sizeof(Pico_mcd->bios));
+  *(unsigned int *)(Pico_mcd->bios + 0x70) = 0xffffffff; // reset hint vector (simplest way to implement reg6)
   PicoMCD |= 2; // s68k reset pending
   Pico_mcd->s68k_regs[3] = 1; // 2M word RAM mode with m68k access after reset
   counter75hz = 0;
@@ -209,6 +210,9 @@ static int PicoFrameHintsMCD(void)
       counter75hz -= counter75hz_lim;
       Check_CD_Command();
     }
+
+    if (Pico_mcd->rot_comp.Reg_58 & 0x8000)
+      gfx_cd_update();
   }
 
   // draw a frame just after vblank in alternative render mode

Pico/cd/gfx_cd.c

@@ -2,10 +2,83 @@
 
 #include "../PicoInt.h"
 
+#define rot_comp Pico_mcd->rot_comp
+
+static int Table_Rot_Time[] =
+{
+	0x00054000, 0x00048000, 0x00040000, 0x00036000,          //; 008-032               ; briefing - sprite
+	0x0002E000, 0x00028000, 0x00024000, 0x00022000,          //; 036-064               ; arbre souvent
+	0x00021000, 0x00020000, 0x0001E000, 0x0001B800,          //; 068-096               ; map thunderstrike
+	0x00019800, 0x00017A00, 0x00015C00, 0x00013E00,          //; 100-128               ; logo défoncé
+
+	0x00012000, 0x00011800, 0x00011000, 0x00010800,          //; 132-160               ; briefing - map
+	0x00010000, 0x0000F800, 0x0000F000, 0x0000E800,          //; 164-192
+	0x0000E000, 0x0000D800, 0x0000D000, 0x0000C800,          //; 196-224
+	0x0000C000, 0x0000B800, 0x0000B000, 0x0000A800,          //; 228-256               ; batman visage
+
+	0x0000A000, 0x00009F00, 0x00009E00, 0x00009D00,          //; 260-288
+	0x00009C00, 0x00009B00, 0x00009A00, 0x00009900,          //; 292-320
+	0x00009800, 0x00009700, 0x00009600, 0x00009500,          //; 324-352
+	0x00009400, 0x00009300, 0x00009200, 0x00009100,          //; 356-384
+
+	0x00009000, 0x00008F00, 0x00008E00, 0x00008D00,          //; 388-416
+	0x00008C00, 0x00008B00, 0x00008A00, 0x00008900,          //; 420-448
+	0x00008800, 0x00008700, 0x00008600, 0x00008500,          //; 452-476
+	0x00008400, 0x00008300, 0x00008200, 0x00008100,          //; 480-512
+};
+
+
+#if 1*0
+typedef struct
+{
+	unsigned int Reg_58;	// Stamp_Size
+	unsigned int Reg_5A;
+	unsigned int Reg_5C;
+	unsigned int Reg_5E;
+	unsigned int Reg_60;
+	unsigned int Reg_62;
+	unsigned int Reg_64;	// V_Dot
+	unsigned int Reg_66;
+
+	unsigned int Stamp_Map_Adr;
+	unsigned int Buffer_Adr;
+	unsigned int Vector_Adr;
+	unsigned int Jmp_Adr;
+	unsigned int Float_Part;
+	unsigned int Draw_Speed;
+
+	unsigned int XS;
+	unsigned int YS;
+	unsigned int DXS;
+	unsigned int DYS;
+	unsigned int XD;
+	unsigned int YD;
+	unsigned int XD_Mul;
+	unsigned int H_Dot;
+} Rot_Comp;
+#endif
 
 static void gfx_cd_start(void)
 {
-		dprintf("gfx_cd_start()");
+	int upd_len;
+
+	dprintf("gfx_cd_start()");
+
+	upd_len = (rot_comp.Reg_62 >> 3) & 0x3f;
+	upd_len = Table_Rot_Time[upd_len];
+
+	rot_comp.Draw_Speed = rot_comp.Float_Part = upd_len;
+
+	rot_comp.Reg_58 |= 0x8000;	// Stamp_Size,  we start a new GFX operation
+
+	gfx_cd_update();
+}
+
+
+static void gfx_completed(void)
+{
+	rot_comp.Reg_58 &= 0x7fff;	// Stamp_Size
+	rot_comp.Reg_64  = 0;
 	if (Pico_mcd->s68k_regs[0x33] & (1<<1))
 	{
 		dprintf("gfx_cd irq 1");
@@ -13,18 +86,70 @@ static void gfx_cd_start(void)
 	}
 }
 
+
+//static void gfx_do(void)
+//{
+//}
+
+
 void gfx_cd_update(void)
 {
+	unsigned char *V_Dot = (unsigned char *) &rot_comp.Reg_64;
+	int jobs;
+
+	dprintf("gfx_cd_update, Reg_64 = %04x", rot_comp.Reg_64);
+
+	if (!*V_Dot)
+	{
+		// ...
+		gfx_completed();
+		return;
+	}
+
+	jobs = rot_comp.Float_Part >> 16;
+
+	if (!jobs)
+	{
+		rot_comp.Float_Part += rot_comp.Draw_Speed;
+		return;
+	}
+
+	rot_comp.Float_Part &= 0xffff;
+	rot_comp.Float_Part += rot_comp.Draw_Speed;
+
+	while (jobs--)
+	{
+		// jmp [Jmp_Adr]:
+		(*V_Dot)--;	// dec byte [V_Dot]
+
+		if (!*V_Dot)
+		{
+			// GFX_Completed:
+			gfx_completed();
+			return;
+		}
+	}
 }
 
 
 unsigned int gfx_cd_read(unsigned int a)
 {
-	dprintf("gfx_cd_read(%x)", a);
+	unsigned int d = 0;
+
+	switch (a) {
+		case 0x58: d = rot_comp.Reg_58; break;
+		case 0x5A: d = rot_comp.Reg_5A; break;
+		case 0x5C: d = rot_comp.Reg_5C; break;
+		case 0x5E: d = rot_comp.Reg_5E; break;
+		case 0x60: d = rot_comp.Reg_60; break;
+		case 0x62: d = rot_comp.Reg_62; break;
+		case 0x64: d = rot_comp.Reg_64; break;
+		case 0x66: break;
+		default: dprintf("gfx_cd_read: unexpected address: %02x", a); break;
+	}
+
+	dprintf("gfx_cd_read(%02x) = %04x", a, d);
 
-//	switch (a) {
-//		case 2:
-//			return;
 	return 0;
 }
 
@@ -33,10 +158,42 @@ void gfx_cd_write(unsigned int a, unsigned int d)
 	dprintf("gfx_cd_write(%x, %04x)", a, d);
 
 	switch (a) {
-		case 0x66:
+		case 0x58: // .Reg_Stamp_Size
+			rot_comp.Reg_58 = d & 7;
+			return;
+
+		case 0x5A: // .Reg_Stamp_Adr
+			rot_comp.Reg_5A = d & 0xffe0;
+			return;
+
+		case 0x5C: // .Reg_IM_VCell_Size
+			rot_comp.Reg_5C = d & 0x1f;
+			return;
+
+		case 0x5E: // .Reg_IM_Adr
+			rot_comp.Reg_5E = d & 0xFFF8;
+			return;
+
+		case 0x60: // .Reg_IM_Offset
+			rot_comp.Reg_60 = d & 0x3f;
+			return;
+
+		case 0x62: // .Reg_IM_HDot_Size
+			rot_comp.Reg_62 = d & 0x1ff;
+			return;
+
+		case 0x64: // .Reg_IM_VDot_Size
+			rot_comp.Reg_64 = d & 0xff;	// V_Dot, must be 32bit?
+			return;
+
+		case 0x66: // .Reg_Vector_Adr
+			rot_comp.Reg_66 = d & 0xfffe;
 			if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
 			gfx_cd_start();
 			return;
+
+		default: dprintf("gfx_cd_write: unexpected address: %02x", a); return;
 	}
 }
 
+

Pico/cd/gfx_cd.h

@@ -1,3 +1,34 @@
+#ifndef _GFX_CD_H
+#define _GFX_CD_H
+
+
+typedef struct
+{
+	unsigned int Reg_58;	// Stamp_Size
+	unsigned int Reg_5A;
+	unsigned int Reg_5C;
+	unsigned int Reg_5E;
+	unsigned int Reg_60;
+	unsigned int Reg_62;
+	unsigned int Reg_64;	// V_Dot
+	unsigned int Reg_66;
+
+	unsigned int Stamp_Map_Adr;
+	unsigned int Buffer_Adr;
+	unsigned int Vector_Adr;
+	unsigned int Jmp_Adr;
+	unsigned int Float_Part;
+	unsigned int Draw_Speed;
+
+	unsigned int XS;
+	unsigned int YS;
+	unsigned int DXS;
+	unsigned int DYS;
+	unsigned int XD;
+	unsigned int YD;
+	unsigned int XD_Mul;
+	unsigned int H_Dot;
+} Rot_Comp;
 
 
 void gfx_cd_update(void);
@@ -5,3 +36,5 @@ void gfx_cd_update(void);
 unsigned int gfx_cd_read(unsigned int a);
 void gfx_cd_write(unsigned int a, unsigned int d);
 
+#endif // _GFX_CD_H
+