[picodrive.git] / pico / 32x / memory.c

#include "../pico_int.h"
#include "../memory.h"

static const char str_mars[] = "MARS";

struct Pico32xMem *Pico32xMem;

static void bank_switch(int b);

// SH2 faking
static const u16 comm_fakevals[] = {
  0x4d5f, 0x4f4b, // M_OK
  0x535f, 0x4f4b, // S_OK
  0x4D41, 0x5346, // MASF - Brutal Unleashed
  0x5331, 0x4d31, // Darxide
  0x5332, 0x4d32,
  0x5333, 0x4d33,
  0x0000, 0x0000, // eq for doom
  0x0002, // Mortal Kombat
  0, // pad
};
int p32x_csum_faked;

static u32 p32x_reg_read16(u32 a)
{
  a &= 0x3e;

  // SH2 faker
  if ((a & 0x30) == 0x20)
  {
    static int f = 0;
    if (a == 0x28 && !p32x_csum_faked) {
      p32x_csum_faked = 1;
      return *(unsigned short *)(Pico.rom + 0x18e);
    }
    if (f >= sizeof(comm_fakevals) / sizeof(comm_fakevals[0]))
      f = 0;
    return comm_fakevals[f++];
  }

  return Pico32x.regs[a / 2];
}

static void p32x_reg_write8(u32 a, u32 d)
{
  a &= 0x3f;

  if (a == 1 && !(Pico32x.regs[0] & 1)) {
    Pico32x.regs[0] |= 1;
    Pico32xStartup();
    return;
  }

  if (!(Pico32x.regs[0] & 1))
    return;

  if (a == 5) {
    d &= 7;
    if (Pico32x.regs[4/2] != d) {
      Pico32x.regs[4/2] = d;
      bank_switch(d);
      return;
    }
  }
}

static void p32x_reg_write16(u32 a, u32 d)
{
  p32x_reg_write8(a + 1, d);
}

// VDP regs
static u32 p32x_vdp_read16(u32 a)
{
  a &= 0x0e;

  return Pico32x.vdp_regs[a / 2];
}

static void p32x_vdp_write8(u32 a, u32 d)
{
  u16 *r = Pico32x.vdp_regs;
  a &= 0x0f;

  // TODO: verify what's writeable
  switch (a) {
    case 0x01:
      if (((r[0] & 3) == 0) != ((d & 3) == 0)) { // forced blanking changed
        if (Pico.video.status & 8)
          r[0x0a/2] |=  P32XV_VBLK;
        else
          r[0x0a/2] &= ~P32XV_VBLK;
      }
      // priority inversion is handled in palette
      if ((r[0] ^ d) & P32XV_PRI)
        Pico32x.dirty_pal = 1;
      r[0] = (r[0] & P32XV_nPAL) | (d & 0xff);
      break;
    case 0x0b:
      d &= 1;
      Pico32x.pending_fb = d;
      // if we are blanking and FS bit is changing
      if ((r[0x0a/2] & P32XV_VBLK) && ((r[0x0a/2] ^ d) & P32XV_FS)) {
        r[0x0a/2] ^= 1;
	Pico32xSwapDRAM(d ^ 1);
      }
      break;
  }
}

static void p32x_vdp_write16(u32 a, u32 d)
{
  p32x_vdp_write8(a | 1, d);
}

// default 32x handlers
u32 PicoRead8_32x(u32 a)
{
  u32 d = 0;
  if ((a & 0xffc0) == 0x5100) { // a15100
    d = p32x_reg_read16(a);
    goto out_16to8;
  }

  if (!(Pico32x.regs[0] & 1))
    goto no_vdp;

  if ((a & 0xfff0) == 0x5180) { // a15180
    d = p32x_vdp_read16(a);
    goto out_16to8;
  }

  if ((a & 0xfe00) == 0x5200) { // a15200
    d = Pico32xMem->pal[(a & 0x1ff) / 2];
    goto out_16to8;
  }

no_vdp:
  if ((a & 0xfffc) == 0x30ec) { // a130ec
    d = str_mars[a & 3];
    goto out;
  }

  elprintf(EL_UIO, "m68k unmapped r8  [%06x] @%06x", a, SekPc);
  return d;

out_16to8:
  if (a & 1)
    d &= 0xff;
  else
    d >>= 8;

out:
  elprintf(EL_32X, "m68k 32x r8  [%06x]   %02x @%06x", a, d, SekPc);
  return d;
}

u32 PicoRead16_32x(u32 a)
{
  u32 d = 0;
  if ((a & 0xffc0) == 0x5100) { // a15100
    d = p32x_reg_read16(a);
    goto out;
  }

  if (!(Pico32x.regs[0] & 1))
    goto no_vdp;

  if ((a & 0xfff0) == 0x5180) { // a15180
    d = p32x_vdp_read16(a);
    goto out;
  }

  if ((a & 0xfe00) == 0x5200) { // a15200
    d = Pico32xMem->pal[(a & 0x1ff) / 2];
    goto out;
  }

no_vdp:
  if ((a & 0xfffc) == 0x30ec) { // a130ec
    d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S';
    goto out;
  }

  elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc);
  return d;

out:
  elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc);
  return d;
}

void PicoWrite8_32x(u32 a, u32 d)
{
  if ((a & 0xfc00) == 0x5000)
    elprintf(EL_32X, "m68k 32x w8  [%06x]   %02x @%06x", a, d & 0xff, SekPc);

  if ((a & 0xffc0) == 0x5100) { // a15100
    p32x_reg_write8(a, d);
    return;
  }

  if (!(Pico32x.regs[0] & 1))
    goto no_vdp;

  if ((a & 0xfff0) == 0x5180) { // a15180
    p32x_vdp_write8(a, d);
    return;
  }

  // TODO: verify
  if ((a & 0xfe00) == 0x5200) { // a15200
    elprintf(EL_32X|EL_ANOMALY, "m68k 32x PAL w8  [%06x]   %02x @%06x", a, d & 0xff, SekPc);
    ((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d;
    Pico32x.dirty_pal = 1;
    return;
  }

no_vdp:
  elprintf(EL_UIO, "m68k unmapped w8  [%06x]   %02x @%06x", a, d & 0xff, SekPc);
}

void PicoWrite16_32x(u32 a, u32 d)
{
  if ((a & 0xfc00) == 0x5000)
    elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);

  if ((a & 0xffc0) == 0x5100) { // a15100
    p32x_reg_write16(a, d);
    return;
  }

  if (!(Pico32x.regs[0] & 1))
    goto no_vdp;

  if ((a & 0xfff0) == 0x5180) { // a15180
    p32x_vdp_write16(a, d);
    return;
  }

  if ((a & 0xfe00) == 0x5200) { // a15200
    Pico32xMem->pal[(a & 0x1ff) / 2] = d;
    Pico32x.dirty_pal = 1;
    return;
  }

no_vdp:
  elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
}

// hint vector is writeable
static void PicoWrite8_hint(u32 a, u32 d)
{
  if ((a & 0xfffc) == 0x0070) {
    Pico32xMem->m68k_rom[a ^ 1] = d;
    return;
  }

  elprintf(EL_UIO, "m68k unmapped w8  [%06x]   %02x @%06x", a, d & 0xff, SekPc);
}

static void PicoWrite16_hint(u32 a, u32 d)
{
  if ((a & 0xfffc) == 0x0070) {
    ((u16 *)Pico32xMem->m68k_rom)[a/2] = d;
    return;
  }

  elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
}

void Pico32xSwapDRAM(int b)
{
  cpu68k_map_set(m68k_read8_map,   0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
  cpu68k_map_set(m68k_read16_map,  0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
  cpu68k_map_set(m68k_write8_map,  0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
  cpu68k_map_set(m68k_write16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
}

static void bank_switch(int b)
{
  unsigned int rs, bank;

  bank = b << 20;
  if (bank >= Pico.romsize) {
    elprintf(EL_32X|EL_ANOMALY, "missing bank @ %06x", bank);
    return;
  }

  // 32X ROM (unbanked, XXX: consider mirroring?)
  rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
  rs -= bank;
  if (rs > 0x100000)
    rs = 0x100000;
  cpu68k_map_set(m68k_read8_map,   0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);
  cpu68k_map_set(m68k_read16_map,  0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);

  elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank);
}

#define HWSWAP(x) (((x) << 16) | ((x) >> 16))
void PicoMemSetup32x(void)
{
  unsigned short *ps;
  unsigned int *pl;
  unsigned int rs;
  int i;

  Pico32xMem = calloc(1, sizeof(*Pico32xMem));
  if (Pico32xMem == NULL) {
    elprintf(EL_STATUS, "OOM");
    return;
  }

  // generate 68k ROM
  ps = (unsigned short *)Pico32xMem->m68k_rom;
  pl = (unsigned int *)Pico32xMem->m68k_rom;
  for (i = 1; i < 0xc0/4; i++)
    pl[i] = HWSWAP(0x880200 + (i - 1) * 6);

  // fill with nops
  for (i = 0xc0/2; i < 0x100/2; i++)
    ps[i] = 0x4e71;

#if 0
  ps[0xc0/2] = 0x46fc;
  ps[0xc2/2] = 0x2700; // move #0x2700,sr
  ps[0xfe/2] = 0x60fe; // jump to self
#else
  ps[0xfe/2] = 0x4e75; // rts
#endif

  // fill remaining mem with ROM
  memcpy(Pico32xMem->m68k_rom + 0x100, Pico.rom + 0x100, sizeof(Pico32xMem->m68k_rom) - 0x100);

  // cartridge area becomes unmapped
  // XXX: we take the easy way and don't unmap ROM,
  // so that we can avoid handling the RV bit.
  // m68k_map_unmap(0x000000, 0x3fffff);

  // MD ROM area
  rs = sizeof(Pico32xMem->m68k_rom);
  cpu68k_map_set(m68k_read8_map,   0x000000, rs - 1, Pico32xMem->m68k_rom, 0);
  cpu68k_map_set(m68k_read16_map,  0x000000, rs - 1, Pico32xMem->m68k_rom, 0);
  cpu68k_map_set(m68k_write8_map,  0x000000, rs - 1, PicoWrite8_hint, 1); // TODO verify
  cpu68k_map_set(m68k_write16_map, 0x000000, rs - 1, PicoWrite16_hint, 1);

  // DRAM area
  Pico32xSwapDRAM(1);

  // 32X ROM (unbanked, XXX: consider mirroring?)
  rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
  if (rs > 0x80000)
    rs = 0x80000;
  cpu68k_map_set(m68k_read8_map,   0x880000, 0x880000 + rs - 1, Pico.rom, 0);
  cpu68k_map_set(m68k_read16_map,  0x880000, 0x880000 + rs - 1, Pico.rom, 0);

  // 32X ROM (banked)
  bank_switch(0);
}
Commit	Line	Data
be2c4208	1	#include "../pico_int.h"
	2	#include "../memory.h"
	3
	4	static const char str_mars[] = "MARS";
	5
974fdb5b	6	struct Pico32xMem *Pico32xMem;
974fdb5b	7
5e49c3a8	8	static void bank_switch(int b);
5e49c3a8	9
974fdb5b	10	// SH2 faking
	11	static const u16 comm_fakevals[] = {
	12	0x4d5f, 0x4f4b, // M_OK
	13	0x535f, 0x4f4b, // S_OK
5e49c3a8	14	0x4D41, 0x5346, // MASF - Brutal Unleashed
	15	0x5331, 0x4d31, // Darxide
	16	0x5332, 0x4d32,
	17	0x5333, 0x4d33,
	18	0x0000, 0x0000, // eq for doom
974fdb5b	19	0x0002, // Mortal Kombat
974fdb5b	20	0, // pad
be2c4208	21	};
5e49c3a8	22	int p32x_csum_faked;
be2c4208	23
be2c4208	24	static u32 p32x_reg_read16(u32 a)
	25	{
	26	a &= 0x3e;
	27
974fdb5b	28	// SH2 faker
	29	if ((a & 0x30) == 0x20)
	30	{
5e49c3a8	31	static int f = 0;
	32	if (a == 0x28 && !p32x_csum_faked) {
	33	p32x_csum_faked = 1;
974fdb5b	34	return (unsigned short )(Pico.rom + 0x18e);
	35	}
	36	if (f >= sizeof(comm_fakevals) / sizeof(comm_fakevals[0]))
	37	f = 0;
	38	return comm_fakevals[f++];
	39	}
	40
be2c4208	41	return Pico32x.regs[a / 2];
	42	}
	43
be2c4208	44	static void p32x_reg_write8(u32 a, u32 d)
	45	{
	46	a &= 0x3f;
	47
	48	if (a == 1 && !(Pico32x.regs[0] & 1)) {
	49	Pico32x.regs[0] \|= 1;
	50	Pico32xStartup();
	51	return;
	52	}
5e49c3a8	53
	54	if (!(Pico32x.regs[0] & 1))
	55	return;
	56
	57	if (a == 5) {
	58	d &= 7;
	59	if (Pico32x.regs[4/2] != d) {
	60	Pico32x.regs[4/2] = d;
	61	bank_switch(d);
	62	return;
	63	}
	64	}
	65	}
	66
	67	static void p32x_reg_write16(u32 a, u32 d)
	68	{
	69	p32x_reg_write8(a + 1, d);
be2c4208	70	}
	71
	72	// VDP regs
	73	static u32 p32x_vdp_read16(u32 a)
	74	{
	75	a &= 0x0e;
	76
	77	return Pico32x.vdp_regs[a / 2];
	78	}
	79
be2c4208	80	static void p32x_vdp_write8(u32 a, u32 d)
be2c4208	81	{
974fdb5b	82	u16 *r = Pico32x.vdp_regs;
be2c4208	83	a &= 0x0f;
be2c4208	84
974fdb5b	85	// TODO: verify what's writeable
be2c4208	86	switch (a) {
974fdb5b	87	case 0x01:
	88	if (((r[0] & 3) == 0) != ((d & 3) == 0)) { // forced blanking changed
	89	if (Pico.video.status & 8)
	90	r[0x0a/2] \|= P32XV_VBLK;
	91	else
	92	r[0x0a/2] &= ~P32XV_VBLK;
	93	}
5e49c3a8	94	// priority inversion is handled in palette
	95	if ((r[0] ^ d) & P32XV_PRI)
	96	Pico32x.dirty_pal = 1;
974fdb5b	97	r[0] = (r[0] & P32XV_nPAL) \| (d & 0xff);
974fdb5b	98	break;
be2c4208	99	case 0x0b:
974fdb5b	100	d &= 1;
	101	Pico32x.pending_fb = d;
	102	// if we are blanking and FS bit is changing
	103	if ((r[0x0a/2] & P32XV_VBLK) && ((r[0x0a/2] ^ d) & P32XV_FS)) {
	104	r[0x0a/2] ^= 1;
	105	Pico32xSwapDRAM(d ^ 1);
be2c4208	106	}
	107	break;
	108	}
	109	}
	110
974fdb5b	111	static void p32x_vdp_write16(u32 a, u32 d)
	112	{
	113	p32x_vdp_write8(a \| 1, d);
	114	}
	115
be2c4208	116	// default 32x handlers
	117	u32 PicoRead8_32x(u32 a)
	118	{
	119	u32 d = 0;
	120	if ((a & 0xffc0) == 0x5100) { // a15100
	121	d = p32x_reg_read16(a);
	122	goto out_16to8;
	123	}
	124
974fdb5b	125	if (!(Pico32x.regs[0] & 1))
	126	goto no_vdp;
	127
	128	if ((a & 0xfff0) == 0x5180) { // a15180
be2c4208	129	d = p32x_vdp_read16(a);
	130	goto out_16to8;
	131	}
	132
974fdb5b	133	if ((a & 0xfe00) == 0x5200) { // a15200
	134	d = Pico32xMem->pal[(a & 0x1ff) / 2];
	135	goto out_16to8;
	136	}
	137
	138	no_vdp:
be2c4208	139	if ((a & 0xfffc) == 0x30ec) { // a130ec
	140	d = str_mars[a & 3];
	141	goto out;
	142	}
	143
	144	elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);
	145	return d;
	146
	147	out_16to8:
	148	if (a & 1)
	149	d &= 0xff;
	150	else
	151	d >>= 8;
	152
	153	out:
	154	elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc);
	155	return d;
	156	}
	157
	158	u32 PicoRead16_32x(u32 a)
	159	{
	160	u32 d = 0;
	161	if ((a & 0xffc0) == 0x5100) { // a15100
	162	d = p32x_reg_read16(a);
	163	goto out;
	164	}
	165
974fdb5b	166	if (!(Pico32x.regs[0] & 1))
	167	goto no_vdp;
	168
	169	if ((a & 0xfff0) == 0x5180) { // a15180
be2c4208	170	d = p32x_vdp_read16(a);
	171	goto out;
	172	}
	173
974fdb5b	174	if ((a & 0xfe00) == 0x5200) { // a15200
	175	d = Pico32xMem->pal[(a & 0x1ff) / 2];
	176	goto out;
	177	}
	178
	179	no_vdp:
be2c4208	180	if ((a & 0xfffc) == 0x30ec) { // a130ec
	181	d = !(a & 2) ? ('M'<<8)\|'A' : ('R'<<8)\|'S';
	182	goto out;
	183	}
	184
	185	elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc);
	186	return d;
	187
	188	out:
	189	elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc);
	190	return d;
	191	}
	192
	193	void PicoWrite8_32x(u32 a, u32 d)
	194	{
	195	if ((a & 0xfc00) == 0x5000)
	196	elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
	197
	198	if ((a & 0xffc0) == 0x5100) { // a15100
	199	p32x_reg_write8(a, d);
	200	return;
	201	}
	202
974fdb5b	203	if (!(Pico32x.regs[0] & 1))
	204	goto no_vdp;
	205
	206	if ((a & 0xfff0) == 0x5180) { // a15180
be2c4208	207	p32x_vdp_write8(a, d);
	208	return;
	209	}
	210
974fdb5b	211	// TODO: verify
	212	if ((a & 0xfe00) == 0x5200) { // a15200
	213	elprintf(EL_32X\|EL_ANOMALY, "m68k 32x PAL w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
	214	((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d;
	215	Pico32x.dirty_pal = 1;
	216	return;
	217	}
	218
	219	no_vdp:
be2c4208	220	elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
	221	}
	222
	223	void PicoWrite16_32x(u32 a, u32 d)
	224	{
	225	if ((a & 0xfc00) == 0x5000)
	226	elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
	227
	228	if ((a & 0xffc0) == 0x5100) { // a15100
	229	p32x_reg_write16(a, d);
	230	return;
	231	}
	232
974fdb5b	233	if (!(Pico32x.regs[0] & 1))
	234	goto no_vdp;
	235
	236	if ((a & 0xfff0) == 0x5180) { // a15180
be2c4208	237	p32x_vdp_write16(a, d);
	238	return;
	239	}
	240
974fdb5b	241	if ((a & 0xfe00) == 0x5200) { // a15200
	242	Pico32xMem->pal[(a & 0x1ff) / 2] = d;
	243	Pico32x.dirty_pal = 1;
	244	return;
	245	}
	246
	247	no_vdp:
be2c4208	248	elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
	249	}
	250
	251	// hint vector is writeable
	252	static void PicoWrite8_hint(u32 a, u32 d)
	253	{
	254	if ((a & 0xfffc) == 0x0070) {
	255	Pico32xMem->m68k_rom[a ^ 1] = d;
	256	return;
	257	}
	258
	259	elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
	260	}
	261
	262	static void PicoWrite16_hint(u32 a, u32 d)
	263	{
	264	if ((a & 0xfffc) == 0x0070) {
	265	((u16 *)Pico32xMem->m68k_rom)[a/2] = d;
	266	return;
	267	}
	268
	269	elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
	270	}
	271
974fdb5b	272	void Pico32xSwapDRAM(int b)
	273	{
	274	cpu68k_map_set(m68k_read8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
	275	cpu68k_map_set(m68k_read16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
	276	cpu68k_map_set(m68k_write8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
	277	cpu68k_map_set(m68k_write16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
	278	}
	279
5e49c3a8	280	static void bank_switch(int b)
	281	{
	282	unsigned int rs, bank;
	283
	284	bank = b << 20;
	285	if (bank >= Pico.romsize) {
	286	elprintf(EL_32X\|EL_ANOMALY, "missing bank @ %06x", bank);
	287	return;
	288	}
	289
	290	// 32X ROM (unbanked, XXX: consider mirroring?)
	291	rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
	292	rs -= bank;
	293	if (rs > 0x100000)
	294	rs = 0x100000;
	295	cpu68k_map_set(m68k_read8_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);
	296	cpu68k_map_set(m68k_read16_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);
	297
	298	elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank);
	299	}
	300
be2c4208	301	#define HWSWAP(x) (((x) << 16) \| ((x) >> 16))
	302	void PicoMemSetup32x(void)
	303	{
	304	unsigned short *ps;
	305	unsigned int *pl;
5e49c3a8	306	unsigned int rs;
be2c4208	307	int i;
	308
	309	Pico32xMem = calloc(1, sizeof(*Pico32xMem));
	310	if (Pico32xMem == NULL) {
	311	elprintf(EL_STATUS, "OOM");
	312	return;
	313	}
	314
	315	// generate 68k ROM
	316	ps = (unsigned short *)Pico32xMem->m68k_rom;
	317	pl = (unsigned int *)Pico32xMem->m68k_rom;
	318	for (i = 1; i < 0xc0/4; i++)
974fdb5b	319	pl[i] = HWSWAP(0x880200 + (i - 1) * 6);
be2c4208	320
	321	// fill with nops
	322	for (i = 0xc0/2; i < 0x100/2; i++)
	323	ps[i] = 0x4e71;
	324
5e49c3a8	325	#if 0
be2c4208	326	ps[0xc0/2] = 0x46fc;
	327	ps[0xc2/2] = 0x2700; // move #0x2700,sr
	328	ps[0xfe/2] = 0x60fe; // jump to self
5e49c3a8	329	#else
	330	ps[0xfe/2] = 0x4e75; // rts
	331	#endif
be2c4208	332
be2c4208	333	// fill remaining mem with ROM
974fdb5b	334	memcpy(Pico32xMem->m68k_rom + 0x100, Pico.rom + 0x100, sizeof(Pico32xMem->m68k_rom) - 0x100);
be2c4208	335
	336	// cartridge area becomes unmapped
	337	// XXX: we take the easy way and don't unmap ROM,
	338	// so that we can avoid handling the RV bit.
	339	// m68k_map_unmap(0x000000, 0x3fffff);
	340
	341	// MD ROM area
974fdb5b	342	rs = sizeof(Pico32xMem->m68k_rom);
	343	cpu68k_map_set(m68k_read8_map, 0x000000, rs - 1, Pico32xMem->m68k_rom, 0);
	344	cpu68k_map_set(m68k_read16_map, 0x000000, rs - 1, Pico32xMem->m68k_rom, 0);
	345	cpu68k_map_set(m68k_write8_map, 0x000000, rs - 1, PicoWrite8_hint, 1); // TODO verify
	346	cpu68k_map_set(m68k_write16_map, 0x000000, rs - 1, PicoWrite16_hint, 1);
	347
	348	// DRAM area
	349	Pico32xSwapDRAM(1);
be2c4208	350
be2c4208	351	// 32X ROM (unbanked, XXX: consider mirroring?)
5e49c3a8	352	rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
	353	if (rs > 0x80000)
	354	rs = 0x80000;
	355	cpu68k_map_set(m68k_read8_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0);
	356	cpu68k_map_set(m68k_read16_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0);
be2c4208	357
be2c4208	358	// 32X ROM (banked)
5e49c3a8	359	bank_switch(0);
be2c4208	360	}
be2c4208	361