[picodrive.git] / pico / cd / gfx_cd.c

// This is a direct rewrite of gfx_cd.asm (x86 asm to C).
// You can even find some x86 register names :)
// Original code (c) 2002 by Stéphane Dallongeville

// (c) Copyright 2007, Grazvydas "notaz" Ignotas


#include "../pico_int.h"

#undef dprintf
#define dprintf(...)

#define _rot_comp Pico_mcd->rot_comp

static void gfx_do_line(unsigned int func, unsigned short *stamp_base,
	unsigned int H_Dot);

static void gfx_cd_start(void)
{
	int w, h;

	w = _rot_comp.Reg_62;
	h = _rot_comp.Reg_64;
	if (w == 0 || h == 0) {
		elprintf(EL_CD|EL_ANOMALY, "gfx_cd_start with %ux%u", w, h);
		_rot_comp.Reg_64 = 0;
		// irq?
		return;
	}

	// _rot_comp.XD_Mul = ((_rot_comp.Reg_5C & 0x1f) + 1) * 4; // unused
	_rot_comp.Function = (_rot_comp.Reg_58 & 7) | (Pico_mcd->s68k_regs[3] & 0x18);	// Jmp_Adr
	// _rot_comp.Buffer_Adr = (_rot_comp.Reg_5E & 0xfff8) << 2; // unused?
	_rot_comp.YD = (_rot_comp.Reg_60 >> 3) & 7;
	_rot_comp.Vector_Adr = (_rot_comp.Reg_66 & 0xfffe) << 2;

	_rot_comp.Reg_58 |= 0x8000;	// Stamp_Size,  we start a new GFX operation

	pcd_event_schedule_s68k(PCD_EVENT_GFX, 5 * w * h);

	switch (_rot_comp.Reg_58 & 6)	// Scr_16?
	{
		case 0:	// ?
			_rot_comp.Stamp_Map_Adr = (_rot_comp.Reg_5A & 0xff80) << 2;
			break;
		case 2: // .Dot_32
			_rot_comp.Stamp_Map_Adr = (_rot_comp.Reg_5A & 0xffe0) << 2;
			break;
		case 4: // .Scr_16
			_rot_comp.Stamp_Map_Adr = 0x20000;
			break;
		case 6: // .Scr_16_Dot_32
			_rot_comp.Stamp_Map_Adr = (_rot_comp.Reg_5A & 0xe000) << 2;
			break;
	}

	if (PicoOpt & POPT_EN_MCD_GFX)
	{
		unsigned int func = _rot_comp.Function;
		unsigned short *stamp_base = (unsigned short *) (Pico_mcd->word_ram2M + _rot_comp.Stamp_Map_Adr);

		while (h--)
			gfx_do_line(func, stamp_base, w);
	}
}


PICO_INTERNAL_ASM unsigned int gfx_cd_read(unsigned int 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;
			if (_rot_comp.Reg_64 > 1)
				// fudge..
				_rot_comp.Reg_64--;
			break;
		case 0x66: break;
		default: dprintf("gfx_cd_read FIXME: unexpected address: %02x", a); break;
	}

	dprintf("gfx_cd_read(%02x) = %04x", a, d);

	return d;

}

static void gfx_do_line(unsigned int func, unsigned short *stamp_base,
	unsigned int H_Dot)
{
	unsigned int eax, ebx, ecx, edx, esi, edi, pixel;
	unsigned int XD, Buffer_Adr;
	int DYXS;

	XD = _rot_comp.Reg_60 & 7;
	Buffer_Adr = ((_rot_comp.Reg_5E & 0xfff8) + _rot_comp.YD) << 2;
	ecx = *(unsigned int *)(Pico_mcd->word_ram2M + _rot_comp.Vector_Adr);
	edx = ecx >> 16;
	ecx = (ecx & 0xffff) << 8;
	edx <<= 8;
	DYXS = *(int *)(Pico_mcd->word_ram2M + _rot_comp.Vector_Adr + 4);
	_rot_comp.Vector_Adr += 8;

	// MAKE_IMAGE_LINE
	while (H_Dot)
	{
		// MAKE_IMAGE_PIXEL
		if (!(func & 1))	// NOT TILED
		{
			int mask = (func & 4) ? 0x00800000 : 0x00f80000;
			if ((ecx | edx) & mask)
			{
				if (func & 0x18) goto Next_Pixel;
				pixel = 0;
				goto Pixel_Out;
			}
		}

		if (func & 2)		// mode 32x32 dot
		{
			if (func & 4)	// 16x16 screen
			{
				ebx = ((ecx >> (11+5)) & 0x007f) |
				      ((edx >> (11-2)) & 0x3f80);
			}
			else		// 1x1 screen
			{
				ebx = ((ecx >> (11+5)) & 0x07) |
				      ((edx >> (11+2)) & 0x38);
			}
		}
		else			// mode 16x16 dot
		{
			if (func & 4)	// 16x16 screen
			{
				ebx = ((ecx >> (11+4)) & 0x00ff) |
				      ((edx >> (11-4)) & 0xff00);
			}
			else		// 1x1 screen
			{
				ebx = ((ecx >> (11+4)) & 0x0f) |
				      ((edx >> (11+0)) & 0xf0);
			}
		}

		edi = stamp_base[ebx];
		esi = (edi & 0x7ff) << 7;
		if (!esi) { pixel = 0; goto Pixel_Out; }
		edi >>= (11+1);
		edi &= (0x1c>>1);
		eax = ecx;
		ebx = edx;
		if (func & 2) edi |= 1;	// 32 dots?
		switch (edi)
		{
			case 0x00:	// No_Flip_0, 16x16 dots
				ebx = (ebx >> 9) & 0x3c;
				ebx += esi;
				edi = (eax & 0x3800) ^ 0x1000;		// bswap
				eax = ((eax >> 8) & 0x40) + ebx;
				break;
			case 0x01:	// No_Flip_0, 32x32 dots
				ebx = (ebx >> 9) & 0x7c;
				ebx += esi;
				edi = (eax & 0x3800) ^ 0x1000;		// bswap
				eax = ((eax >> 7) & 0x180) + ebx;
				break;
			case 0x02:	// No_Flip_90, 16x16 dots
				eax = (eax >> 9) & 0x3c;
				eax += esi;
				edi = (ebx & 0x3800) ^ 0x2800;		// bswap
				eax += ((ebx >> 8) & 0x40) ^ 0x40;
				break;
			case 0x03:	// No_Flip_90, 32x32 dots
				eax = (eax >> 9) & 0x7c;
				eax += esi;
				edi = (ebx & 0x3800) ^ 0x2800;		// bswap
				eax += ((ebx >> 7) & 0x180) ^ 0x180;
				break;
			case 0x04:	// No_Flip_180, 16x16 dots
				ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
				ebx += esi;
				edi = (eax & 0x3800) ^ 0x2800;		// bswap and flip
				eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
				break;
			case 0x05:	// No_Flip_180, 32x32 dots
				ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
				ebx += esi;
				edi = (eax & 0x3800) ^ 0x2800;		// bswap and flip
				eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
				break;
			case 0x06:	// No_Flip_270, 16x16 dots
				eax = ((eax >> 9) & 0x3c) ^ 0x3c;
				eax += esi;
				edi = (ebx & 0x3800) ^ 0x1000;		// bswap
				eax += (ebx >> 8) & 0x40;
				break;
			case 0x07:	// No_Flip_270, 32x32 dots
				eax = ((eax >> 9) & 0x7c) ^ 0x7c;
				eax += esi;
				edi = (ebx & 0x3800) ^ 0x1000;		// bswap
				eax += (ebx >> 7) & 0x180;
				break;
			case 0x08:	// Flip_0, 16x16 dots
				ebx = (ebx >> 9) & 0x3c;
				ebx += esi;
				edi = (eax & 0x3800) ^ 0x2800;		// bswap, flip
				eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
				break;
			case 0x09:	// Flip_0, 32x32 dots
				ebx = (ebx >> 9) & 0x7c;
				ebx += esi;
				edi = (eax & 0x3800) ^ 0x2800;		// bswap, flip
				eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
				break;
			case 0x0a:	// Flip_90, 16x16 dots
				eax = ((eax >> 9) & 0x3c) ^ 0x3c;
				eax += esi;
				edi = (ebx & 0x3800) ^ 0x2800;		// bswap, flip
				eax += ((ebx >> 8) & 0x40) ^ 0x40;
				break;
			case 0x0b:	// Flip_90, 32x32 dots
				eax = ((eax >> 9) & 0x7c) ^ 0x7c;
				eax += esi;
				edi = (ebx & 0x3800) ^ 0x2800;		// bswap, flip
				eax += ((ebx >> 7) & 0x180) ^ 0x180;
				break;
			case 0x0c:	// Flip_180, 16x16 dots
				ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
				ebx += esi;
				edi = (eax & 0x3800) ^ 0x1000;		// bswap
				eax = ((eax >> 8) & 0x40) + ebx;
				break;
			case 0x0d:	// Flip_180, 32x32 dots
				ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
				ebx += esi;
				edi = (eax & 0x3800) ^ 0x1000;		// bswap
				eax = ((eax >> 7) & 0x180) + ebx;
				break;
			case 0x0e:	// Flip_270, 16x16 dots
				eax = (eax >> 9) & 0x3c;
				eax += esi;
				edi = (ebx & 0x3800) ^ 0x1000;		// bswap, flip
				eax += (ebx >> 8) & 0x40;
				break;
			case 0x0f:	// Flip_270, 32x32 dots
				eax = (eax >> 9) & 0x7c;
				eax += esi;
				edi = (ebx & 0x3800) ^ 0x1000;		// bswap, flip
				eax += (ebx >> 7) & 0x180;
				break;
		}

		pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
		if (!(edi & 0x800)) pixel >>= 4;
		else pixel &= 0x0f;

Pixel_Out:
		if (!pixel && (func & 0x18)) goto Next_Pixel;
		esi = Buffer_Adr + ((XD>>1)^1);				// pixel addr
		eax = *(Pico_mcd->word_ram2M + esi);			// old pixel
		if (XD & 1)
		{
			if ((eax & 0x0f) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
			*(Pico_mcd->word_ram2M + esi) = pixel | (eax & 0xf0);
		}
		else
		{
			if ((eax & 0xf0) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
			*(Pico_mcd->word_ram2M + esi) = (pixel << 4) | (eax & 0xf);
		}


Next_Pixel:
		ecx += (DYXS << 16) >> 16;	// _rot_comp.DXS;
		edx +=  DYXS >> 16;		// _rot_comp.DYS;
		XD++;
		if (XD >= 8)
		{
			Buffer_Adr += ((_rot_comp.Reg_5C & 0x1f) + 1) << 5;
			XD = 0;
		}
		H_Dot--;
	}
	// end while


// nothing_to_draw:
	_rot_comp.YD++;
	// _rot_comp.V_Dot--; // will be done by caller
}


PICO_INTERNAL_ASM void gfx_cd_write16(unsigned int a, unsigned int d)
{
	dprintf("gfx_cd_write16(%x, %04x)", a, d);

	if (_rot_comp.Reg_58 & 0x8000)
		elprintf(EL_CD|EL_ANOMALY, "cd: busy gfx reg write %02x %04x", a, d);

	switch (a) {
		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_write16 FIXME: unexpected address: %02x", a); return;
	}
}


PICO_INTERNAL void gfx_cd_reset(void)
{
	memset(&_rot_comp.Reg_58, 0, sizeof(_rot_comp));
}


// --------------------------------

#include "cell_map.c"

#ifndef UTYPES_DEFINED
typedef unsigned short u16;
#endif

// check: Heart of the alien, jaguar xj 220
PICO_INTERNAL void DmaSlowCell(unsigned int source, unsigned int a, int len, unsigned char inc)
{
  unsigned char *base;
  unsigned int asrc, a2;
  u16 *r;

  base = Pico_mcd->word_ram1M[Pico_mcd->s68k_regs[3]&1];

  switch (Pico.video.type)
  {
    case 1: // vram
      r = Pico.vram;
      for(; len; len--)
      {
        asrc = cell_map(source >> 2) << 2;
        asrc |= source & 2;
        // if(a&1) d=(d<<8)|(d>>8); // ??
        r[a>>1] = *(u16 *)(base + asrc);
	source += 2;
        // AutoIncrement
        a=(u16)(a+inc);
      }
      rendstatus |= PDRAW_SPRITES_MOVED;
      break;

    case 3: // cram
      Pico.m.dirtyPal = 1;
      r = Pico.cram;
      for(a2=a&0x7f; len; len--)
      {
        asrc = cell_map(source >> 2) << 2;
        asrc |= source & 2;
        r[a2>>1] = *(u16 *)(base + asrc);
	source += 2;
        // AutoIncrement
        a2+=inc;
        // good dest?
        if(a2 >= 0x80) break;
      }
      a=(a&0xff00)|a2;
      break;

    case 5: // vsram[a&0x003f]=d;
      r = Pico.vsram;
      for(a2=a&0x7f; len; len--)
      {
        asrc = cell_map(source >> 2) << 2;
        asrc |= source & 2;
        r[a2>>1] = *(u16 *)(base + asrc);
	source += 2;
        // AutoIncrement
        a2+=inc;
        // good dest?
        if(a2 >= 0x80) break;
      }
      a=(a&0xff00)|a2;
      break;
  }
  // remember addr
  Pico.video.addr=(u16)a;
}
Commit	Line	Data
6cadc2da	1	// This is a direct rewrite of gfx_cd.asm (x86 asm to C).
	2	// You can even find some x86 register names :)
	3	// Original code (c) 2002 by Stéphane Dallongeville
	4
	5	// (c) Copyright 2007, Grazvydas "notaz" Ignotas
	6
cb4a513a	7
efcba75f	8	#include "../pico_int.h"
cb4a513a	9
9c9cda8c	10	#undef dprintf
	11	#define dprintf(...)
	12
eff55556	13	#define _rot_comp Pico_mcd->rot_comp
d1df8786	14
ae214f1c	15	static void gfx_do_line(unsigned int func, unsigned short *stamp_base,
ae214f1c	16	unsigned int H_Dot);
d1df8786	17
cb4a513a	18	static void gfx_cd_start(void)
cb4a513a	19	{
ae214f1c	20	int w, h;
	21
	22	w = _rot_comp.Reg_62;
	23	h = _rot_comp.Reg_64;
	24	if (w == 0 \|\| h == 0) {
	25	elprintf(EL_CD\|EL_ANOMALY, "gfx_cd_start with %ux%u", w, h);
	26	_rot_comp.Reg_64 = 0;
	27	// irq?
	28	return;
	29	}
d1df8786	30
eff55556	31	// _rot_comp.XD_Mul = ((_rot_comp.Reg_5C & 0x1f) + 1) * 4; // unused
	32	_rot_comp.Function = (_rot_comp.Reg_58 & 7) \| (Pico_mcd->s68k_regs[3] & 0x18); // Jmp_Adr
	33	// _rot_comp.Buffer_Adr = (_rot_comp.Reg_5E & 0xfff8) << 2; // unused?
	34	_rot_comp.YD = (_rot_comp.Reg_60 >> 3) & 7;
	35	_rot_comp.Vector_Adr = (_rot_comp.Reg_66 & 0xfffe) << 2;
a4030801	36
eff55556	37	_rot_comp.Reg_58 \|= 0x8000; // Stamp_Size, we start a new GFX operation
d1df8786	38
ae214f1c	39	pcd_event_schedule_s68k(PCD_EVENT_GFX, 5 * w * h);
ae214f1c	40
eff55556	41	switch (_rot_comp.Reg_58 & 6) // Scr_16?
a4030801	42	{
a4030801	43	case 0: // ?
eff55556	44	_rot_comp.Stamp_Map_Adr = (_rot_comp.Reg_5A & 0xff80) << 2;
a4030801	45	break;
a4030801	46	case 2: // .Dot_32
eff55556	47	_rot_comp.Stamp_Map_Adr = (_rot_comp.Reg_5A & 0xffe0) << 2;
a4030801	48	break;
a4030801	49	case 4: // .Scr_16
eff55556	50	_rot_comp.Stamp_Map_Adr = 0x20000;
a4030801	51	break;
a4030801	52	case 6: // .Scr_16_Dot_32
eff55556	53	_rot_comp.Stamp_Map_Adr = (_rot_comp.Reg_5A & 0xe000) << 2;
a4030801	54	break;
	55	}
	56
ae214f1c	57	if (PicoOpt & POPT_EN_MCD_GFX)
	58	{
	59	unsigned int func = _rot_comp.Function;
	60	unsigned short stamp_base = (unsigned short ) (Pico_mcd->word_ram2M + _rot_comp.Stamp_Map_Adr);
c008977e	61
ae214f1c	62	while (h--)
	63	gfx_do_line(func, stamp_base, w);
	64	}
d1df8786	65	}
	66
	67
ae214f1c	68	PICO_INTERNAL_ASM unsigned int gfx_cd_read(unsigned int a)
d1df8786	69	{
ae214f1c	70	unsigned int d = 0;
	71
	72	switch (a) {
	73	case 0x58: d = _rot_comp.Reg_58; break;
	74	case 0x5A: d = _rot_comp.Reg_5A; break;
	75	case 0x5C: d = _rot_comp.Reg_5C; break;
	76	case 0x5E: d = _rot_comp.Reg_5E; break;
	77	case 0x60: d = _rot_comp.Reg_60; break;
	78	case 0x62: d = _rot_comp.Reg_62; break;
	79	case 0x64:
	80	d = _rot_comp.Reg_64;
	81	if (_rot_comp.Reg_64 > 1)
	82	// fudge..
	83	_rot_comp.Reg_64--;
	84	break;
	85	case 0x66: break;
	86	default: dprintf("gfx_cd_read FIXME: unexpected address: %02x", a); break;
cb4a513a	87	}
cb4a513a	88
ae214f1c	89	dprintf("gfx_cd_read(%02x) = %04x", a, d);
	90
	91	return d;
	92
	93	}
d1df8786	94
ae214f1c	95	static void gfx_do_line(unsigned int func, unsigned short *stamp_base,
ae214f1c	96	unsigned int H_Dot)
a4030801	97	{
528ec956	98	unsigned int eax, ebx, ecx, edx, esi, edi, pixel;
00bd648e	99	unsigned int XD, Buffer_Adr;
528ec956	100	int DYXS;
a4030801	101
eff55556	102	XD = _rot_comp.Reg_60 & 7;
	103	Buffer_Adr = ((_rot_comp.Reg_5E & 0xfff8) + _rot_comp.YD) << 2;
	104	ecx = (unsigned int )(Pico_mcd->word_ram2M + _rot_comp.Vector_Adr);
a4030801	105	edx = ecx >> 16;
	106	ecx = (ecx & 0xffff) << 8;
	107	edx <<= 8;
eff55556	108	DYXS = (int )(Pico_mcd->word_ram2M + _rot_comp.Vector_Adr + 4);
eff55556	109	_rot_comp.Vector_Adr += 8;
a4030801	110
a4030801	111	// MAKE_IMAGE_LINE
528ec956	112	while (H_Dot)
a4030801	113	{
c008977e	114	// MAKE_IMAGE_PIXEL
	115	if (!(func & 1)) // NOT TILED
	116	{
	117	int mask = (func & 4) ? 0x00800000 : 0x00f80000;
	118	if ((ecx \| edx) & mask)
	119	{
	120	if (func & 0x18) goto Next_Pixel;
	121	pixel = 0;
	122	goto Pixel_Out;
	123	}
	124	}
	125
a4030801	126	if (func & 2) // mode 32x32 dot
	127	{
	128	if (func & 4) // 16x16 screen
	129	{
00bd648e	130	ebx = ((ecx >> (11+5)) & 0x007f) \|
00bd648e	131	((edx >> (11-2)) & 0x3f80);
a4030801	132	}
	133	else // 1x1 screen
	134	{
00bd648e	135	ebx = ((ecx >> (11+5)) & 0x07) \|
00bd648e	136	((edx >> (11+2)) & 0x38);
a4030801	137	}
	138	}
	139	else // mode 16x16 dot
	140	{
	141	if (func & 4) // 16x16 screen
	142	{
00bd648e	143	ebx = ((ecx >> (11+4)) & 0x00ff) \|
00bd648e	144	((edx >> (11-4)) & 0xff00);
a4030801	145	}
	146	else // 1x1 screen
	147	{
00bd648e	148	ebx = ((ecx >> (11+4)) & 0x0f) \|
00bd648e	149	((edx >> (11+0)) & 0xf0);
a4030801	150	}
a4030801	151	}
a4030801	152
c008977e	153	edi = stamp_base[ebx];
00bd648e	154	esi = (edi & 0x7ff) << 7;
528ec956	155	if (!esi) { pixel = 0; goto Pixel_Out; }
00bd648e	156	edi >>= (11+1);
a4030801	157	edi &= (0x1c>>1);
	158	eax = ecx;
	159	ebx = edx;
	160	if (func & 2) edi \|= 1; // 32 dots?
	161	switch (edi)
	162	{
	163	case 0x00: // No_Flip_0, 16x16 dots
	164	ebx = (ebx >> 9) & 0x3c;
	165	ebx += esi;
	166	edi = (eax & 0x3800) ^ 0x1000; // bswap
	167	eax = ((eax >> 8) & 0x40) + ebx;
a4030801	168	break;
	169	case 0x01: // No_Flip_0, 32x32 dots
	170	ebx = (ebx >> 9) & 0x7c;
	171	ebx += esi;
	172	edi = (eax & 0x3800) ^ 0x1000; // bswap
	173	eax = ((eax >> 7) & 0x180) + ebx;
a4030801	174	break;
	175	case 0x02: // No_Flip_90, 16x16 dots
	176	eax = (eax >> 9) & 0x3c;
	177	eax += esi;
	178	edi = (ebx & 0x3800) ^ 0x2800; // bswap
	179	eax += ((ebx >> 8) & 0x40) ^ 0x40;
a4030801	180	break;
	181	case 0x03: // No_Flip_90, 32x32 dots
	182	eax = (eax >> 9) & 0x7c;
	183	eax += esi;
	184	edi = (ebx & 0x3800) ^ 0x2800; // bswap
01bc6b19	185	eax += ((ebx >> 7) & 0x180) ^ 0x180;
a4030801	186	break;
	187	case 0x04: // No_Flip_180, 16x16 dots
	188	ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
	189	ebx += esi;
	190	edi = (eax & 0x3800) ^ 0x2800; // bswap and flip
	191	eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
a4030801	192	break;
	193	case 0x05: // No_Flip_180, 32x32 dots
	194	ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
	195	ebx += esi;
	196	edi = (eax & 0x3800) ^ 0x2800; // bswap and flip
	197	eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
a4030801	198	break;
	199	case 0x06: // No_Flip_270, 16x16 dots
	200	eax = ((eax >> 9) & 0x3c) ^ 0x3c;
	201	eax += esi;
	202	edi = (ebx & 0x3800) ^ 0x1000; // bswap
	203	eax += (ebx >> 8) & 0x40;
a4030801	204	break;
	205	case 0x07: // No_Flip_270, 32x32 dots
	206	eax = ((eax >> 9) & 0x7c) ^ 0x7c;
	207	eax += esi;
	208	edi = (ebx & 0x3800) ^ 0x1000; // bswap
	209	eax += (ebx >> 7) & 0x180;
a4030801	210	break;
a4030801	211	case 0x08: // Flip_0, 16x16 dots
01bc6b19	212	ebx = (ebx >> 9) & 0x3c;
a4030801	213	ebx += esi;
	214	edi = (eax & 0x3800) ^ 0x2800; // bswap, flip
	215	eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
a4030801	216	break;
a4030801	217	case 0x09: // Flip_0, 32x32 dots
01bc6b19	218	ebx = (ebx >> 9) & 0x7c;
a4030801	219	ebx += esi;
	220	edi = (eax & 0x3800) ^ 0x2800; // bswap, flip
	221	eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
a4030801	222	break;
	223	case 0x0a: // Flip_90, 16x16 dots
	224	eax = ((eax >> 9) & 0x3c) ^ 0x3c;
	225	eax += esi;
	226	edi = (ebx & 0x3800) ^ 0x2800; // bswap, flip
	227	eax += ((ebx >> 8) & 0x40) ^ 0x40;
a4030801	228	break;
	229	case 0x0b: // Flip_90, 32x32 dots
	230	eax = ((eax >> 9) & 0x7c) ^ 0x7c;
	231	eax += esi;
	232	edi = (ebx & 0x3800) ^ 0x2800; // bswap, flip
	233	eax += ((ebx >> 7) & 0x180) ^ 0x180;
a4030801	234	break;
	235	case 0x0c: // Flip_180, 16x16 dots
	236	ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
	237	ebx += esi;
	238	edi = (eax & 0x3800) ^ 0x1000; // bswap
	239	eax = ((eax >> 8) & 0x40) + ebx;
a4030801	240	break;
	241	case 0x0d: // Flip_180, 32x32 dots
	242	ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
	243	ebx += esi;
	244	edi = (eax & 0x3800) ^ 0x1000; // bswap
	245	eax = ((eax >> 7) & 0x180) + ebx;
a4030801	246	break;
	247	case 0x0e: // Flip_270, 16x16 dots
	248	eax = (eax >> 9) & 0x3c;
	249	eax += esi;
	250	edi = (ebx & 0x3800) ^ 0x1000; // bswap, flip
	251	eax += (ebx >> 8) & 0x40;
a4030801	252	break;
	253	case 0x0f: // Flip_270, 32x32 dots
	254	eax = (eax >> 9) & 0x7c;
	255	eax += esi;
	256	edi = (ebx & 0x3800) ^ 0x1000; // bswap, flip
	257	eax += (ebx >> 7) & 0x180;
a4030801	258	break;
	259	}
	260
01bc6b19	261	pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
01bc6b19	262	if (!(edi & 0x800)) pixel >>= 4;
528ec956	263	else pixel &= 0x0f;
01bc6b19	264
a4030801	265	Pixel_Out:
a4030801	266	if (!pixel && (func & 0x18)) goto Next_Pixel;
528ec956	267	esi = Buffer_Adr + ((XD>>1)^1); // pixel addr
a4030801	268	eax = *(Pico_mcd->word_ram2M + esi); // old pixel
528ec956	269	if (XD & 1)
a4030801	270	{
	271	if ((eax & 0x0f) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
	272	*(Pico_mcd->word_ram2M + esi) = pixel \| (eax & 0xf0);
	273	}
	274	else
	275	{
	276	if ((eax & 0xf0) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
	277	*(Pico_mcd->word_ram2M + esi) = (pixel << 4) \| (eax & 0xf);
	278	}
	279
	280
	281	Next_Pixel:
eff55556	282	ecx += (DYXS << 16) >> 16; // _rot_comp.DXS;
eff55556	283	edx += DYXS >> 16; // _rot_comp.DYS;
528ec956	284	XD++;
528ec956	285	if (XD >= 8)
a4030801	286	{
eff55556	287	Buffer_Adr += ((_rot_comp.Reg_5C & 0x1f) + 1) << 5;
528ec956	288	XD = 0;
a4030801	289	}
528ec956	290	H_Dot--;
a4030801	291	}
528ec956	292	// end while
a4030801	293
a4030801	294
00bd648e	295	// nothing_to_draw:
eff55556	296	_rot_comp.YD++;
eff55556	297	// _rot_comp.V_Dot--; // will be done by caller
a4030801	298	}
d1df8786	299
d1df8786	300
eff55556	301	PICO_INTERNAL_ASM void gfx_cd_write16(unsigned int a, unsigned int d)
cb4a513a	302	{
5c69a605	303	dprintf("gfx_cd_write16(%x, %04x)", a, d);
cb4a513a	304
ae214f1c	305	if (_rot_comp.Reg_58 & 0x8000)
	306	elprintf(EL_CD\|EL_ANOMALY, "cd: busy gfx reg write %02x %04x", a, d);
	307
cb4a513a	308	switch (a) {
d1df8786	309	case 0x58: // .Reg_Stamp_Size
eff55556	310	_rot_comp.Reg_58 = d & 7;
d1df8786	311	return;
	312
	313	case 0x5A: // .Reg_Stamp_Adr
eff55556	314	_rot_comp.Reg_5A = d & 0xffe0;
d1df8786	315	return;
	316
	317	case 0x5C: // .Reg_IM_VCell_Size
eff55556	318	_rot_comp.Reg_5C = d & 0x1f;
d1df8786	319	return;
	320
	321	case 0x5E: // .Reg_IM_Adr
eff55556	322	_rot_comp.Reg_5E = d & 0xFFF8;
d1df8786	323	return;
	324
	325	case 0x60: // .Reg_IM_Offset
eff55556	326	_rot_comp.Reg_60 = d & 0x3f;
d1df8786	327	return;
	328
	329	case 0x62: // .Reg_IM_HDot_Size
eff55556	330	_rot_comp.Reg_62 = d & 0x1ff;
d1df8786	331	return;
	332
	333	case 0x64: // .Reg_IM_VDot_Size
eff55556	334	_rot_comp.Reg_64 = d & 0xff; // V_Dot, must be 32bit?
d1df8786	335	return;
	336
	337	case 0x66: // .Reg_Vector_Adr
eff55556	338	_rot_comp.Reg_66 = d & 0xfffe;
cb4a513a	339	if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
	340	gfx_cd_start();
	341	return;
d1df8786	342
5c69a605	343	default: dprintf("gfx_cd_write16 FIXME: unexpected address: %02x", a); return;
cb4a513a	344	}
	345	}
	346
d1df8786	347
eff55556	348	PICO_INTERNAL void gfx_cd_reset(void)
51a902ae	349	{
eff55556	350	memset(&_rot_comp.Reg_58, 0, sizeof(_rot_comp));
fa1e5e29	351	}
	352
	353
	354	// --------------------------------
	355
	356	#include "cell_map.c"
	357
eff55556	358	#ifndef UTYPES_DEFINED
fa1e5e29	359	typedef unsigned short u16;
eff55556	360	#endif
fa1e5e29	361
0a051f55	362	// check: Heart of the alien, jaguar xj 220
eff55556	363	PICO_INTERNAL void DmaSlowCell(unsigned int source, unsigned int a, int len, unsigned char inc)
fa1e5e29	364	{
	365	unsigned char *base;
	366	unsigned int asrc, a2;
	367	u16 *r;
	368
	369	base = Pico_mcd->word_ram1M[Pico_mcd->s68k_regs[3]&1];
	370
	371	switch (Pico.video.type)
	372	{
	373	case 1: // vram
	374	r = Pico.vram;
	375	for(; len; len--)
	376	{
	377	asrc = cell_map(source >> 2) << 2;
	378	asrc \|= source & 2;
	379	// if(a&1) d=(d<<8)\|(d>>8); // ??
	380	r[a>>1] = (u16 )(base + asrc);
	381	source += 2;
	382	// AutoIncrement
	383	a=(u16)(a+inc);
	384	}
602133e1	385	rendstatus \|= PDRAW_SPRITES_MOVED;
fa1e5e29	386	break;
	387
	388	case 3: // cram
	389	Pico.m.dirtyPal = 1;
	390	r = Pico.cram;
	391	for(a2=a&0x7f; len; len--)
	392	{
	393	asrc = cell_map(source >> 2) << 2;
	394	asrc \|= source & 2;
	395	r[a2>>1] = (u16 )(base + asrc);
	396	source += 2;
	397	// AutoIncrement
	398	a2+=inc;
	399	// good dest?
	400	if(a2 >= 0x80) break;
	401	}
	402	a=(a&0xff00)\|a2;
	403	break;
	404
	405	case 5: // vsram[a&0x003f]=d;
	406	r = Pico.vsram;
	407	for(a2=a&0x7f; len; len--)
	408	{
	409	asrc = cell_map(source >> 2) << 2;
	410	asrc \|= source & 2;
	411	r[a2>>1] = (u16 )(base + asrc);
	412	source += 2;
	413	// AutoIncrement
	414	a2+=inc;
	415	// good dest?
	416	if(a2 >= 0x80) break;
	417	}
	418	a=(a&0xff00)\|a2;
	419	break;
	420	}
	421	// remember addr
	422	Pico.video.addr=(u16)a;
51a902ae	423	}
51a902ae	424