[pcsx_rearmed.git] / libpcsxcore / psxmem.c

/***************************************************************************
 *   Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team              *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA.           *
 ***************************************************************************/

/*
* PSX memory functions.
*/

// TODO: Implement caches & cycle penalty.

#include "psxmem.h"
#include "r3000a.h"
#include "psxhw.h"
#include <sys/mman.h>

#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif

s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
s8 *psxP = NULL; // Parallel Port (64K)
s8 *psxR = NULL; // BIOS ROM (512K)
s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)

u8 **psxMemWLUT = NULL;
u8 **psxMemRLUT = NULL;

/*  Playstation Memory Map (from Playstation doc by Joshua Walker)
0x0000_0000-0x0000_ffff		Kernel (64K)
0x0001_0000-0x001f_ffff		User Memory (1.9 Meg)

0x1f00_0000-0x1f00_ffff		Parallel Port (64K)

0x1f80_0000-0x1f80_03ff		Scratch Pad (1024 bytes)

0x1f80_1000-0x1f80_2fff		Hardware Registers (8K)

0x1fc0_0000-0x1fc7_ffff		BIOS (512K)

0x8000_0000-0x801f_ffff		Kernel and User Memory Mirror (2 Meg) Cached
0x9fc0_0000-0x9fc7_ffff		BIOS Mirror (512K) Cached

0xa000_0000-0xa01f_ffff		Kernel and User Memory Mirror (2 Meg) Uncached
0xbfc0_0000-0xbfc7_ffff		BIOS Mirror (512K) Uncached
*/

int psxMemInit() {
	int i;

	psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
	psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
	memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
	memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));

	psxM = mmap((void *)0x80000000, 0x00220000,
		PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

	psxP = &psxM[0x200000];
	psxH = &psxM[0x210000];

	psxR = mmap((void *)0x9fc00000, 0x80000,
		PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

	if (psxMemRLUT == NULL || psxMemWLUT == NULL || 
		psxM != (void *)0x80000000 || psxR != (void *)0x9fc00000 ||
		psxP == NULL || psxH == NULL) {
		SysMessage(_("Error allocating memory!"));
		return -1;
	}

// MemR
	for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];

	memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
	memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));

	psxMemRLUT[0x1f00] = (u8 *)psxP;
	psxMemRLUT[0x1f80] = (u8 *)psxH;

	for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];

	memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
	memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));

// MemW
	for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];

	memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
	memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));

	psxMemWLUT[0x1f00] = (u8 *)psxP;
	psxMemWLUT[0x1f80] = (u8 *)psxH;

	return 0;
}

void psxMemReset() {
	FILE *f = NULL;
	char bios[1024];

	memset(psxM, 0, 0x00200000);
	memset(psxP, 0, 0x00010000);

	if (strcmp(Config.Bios, "HLE") != 0) {
		sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
		f = fopen(bios, "rb");

		if (f == NULL) {
			SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
			memset(psxR, 0, 0x80000);
			Config.HLE = TRUE;
		} else {
			fread(psxR, 1, 0x80000, f);
			fclose(f);
			Config.HLE = FALSE;
		}
	} else Config.HLE = TRUE;
}

void psxMemShutdown() {
	munmap(psxM, 0x00220000);
	munmap(psxR, 0x80000);

	free(psxMemRLUT);
	free(psxMemWLUT);
}

static int writeok = 1;

u8 psxMemRead8(u32 mem) {
	char *p;
	u32 t;

	t = mem >> 16;
	if (t == 0x1f80) {
		if (mem < 0x1f801000)
			return psxHu8(mem);
		else
			return psxHwRead8(mem);
	} else {
		p = (char *)(psxMemRLUT[t]);
		if (p != NULL) {
			if (Config.Debug)
				DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
			return *(u8 *)(p + (mem & 0xffff));
		} else {
#ifdef PSXMEM_LOG
			PSXMEM_LOG("err lb %8.8lx\n", mem);
#endif
			return 0;
		}
	}
}

u16 psxMemRead16(u32 mem) {
	char *p;
	u32 t;

	t = mem >> 16;
	if (t == 0x1f80) {
		if (mem < 0x1f801000)
			return psxHu16(mem);
		else
			return psxHwRead16(mem);
	} else {
		p = (char *)(psxMemRLUT[t]);
		if (p != NULL) {
			if (Config.Debug)
				DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
			return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
		} else {
#ifdef PSXMEM_LOG
			PSXMEM_LOG("err lh %8.8lx\n", mem);
#endif
			return 0;
		}
	}
}

u32 psxMemRead32(u32 mem) {
	char *p;
	u32 t;

	t = mem >> 16;
	if (t == 0x1f80) {
		if (mem < 0x1f801000)
			return psxHu32(mem);
		else
			return psxHwRead32(mem);
	} else {
		p = (char *)(psxMemRLUT[t]);
		if (p != NULL) {
			if (Config.Debug)
				DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
			return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
		} else {
#ifdef PSXMEM_LOG
			if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
#endif
			return 0;
		}
	}
}

void psxMemWrite8(u32 mem, u8 value) {
	char *p;
	u32 t;

	t = mem >> 16;
	if (t == 0x1f80) {
		if (mem < 0x1f801000)
			psxHu8(mem) = value;
		else
			psxHwWrite8(mem, value);
	} else {
		p = (char *)(psxMemWLUT[t]);
		if (p != NULL) {
			if (Config.Debug)
				DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
			*(u8 *)(p + (mem & 0xffff)) = value;
#ifdef PSXREC
			psxCpu->Clear((mem & (~3)), 1);
#endif
		} else {
#ifdef PSXMEM_LOG
			PSXMEM_LOG("err sb %8.8lx\n", mem);
#endif
		}
	}
}

void psxMemWrite16(u32 mem, u16 value) {
	char *p;
	u32 t;

	t = mem >> 16;
	if (t == 0x1f80) {
		if (mem < 0x1f801000)
			psxHu16ref(mem) = SWAPu16(value);
		else
			psxHwWrite16(mem, value);
	} else {
		p = (char *)(psxMemWLUT[t]);
		if (p != NULL) {
			if (Config.Debug)
				DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
			*(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
#ifdef PSXREC
			psxCpu->Clear((mem & (~3)), 1);
#endif
		} else {
#ifdef PSXMEM_LOG
			PSXMEM_LOG("err sh %8.8lx\n", mem);
#endif
		}
	}
}

void psxMemWrite32(u32 mem, u32 value) {
	char *p;
	u32 t;

//	if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
	t = mem >> 16;
	if (t == 0x1f80) {
		if (mem < 0x1f801000)
			psxHu32ref(mem) = SWAPu32(value);
		else
			psxHwWrite32(mem, value);
	} else {
		p = (char *)(psxMemWLUT[t]);
		if (p != NULL) {
			if (Config.Debug)
				DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
			*(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
#ifdef PSXREC
			psxCpu->Clear(mem, 1);
#endif
		} else {
			if (mem != 0xfffe0130) {
#ifdef PSXREC
				if (!writeok)
					psxCpu->Clear(mem, 1);
#endif

#ifdef PSXMEM_LOG
				if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
#endif
			} else {
				int i;

				switch (value) {
					case 0x800: case 0x804:
						if (writeok == 0) break;
						writeok = 0;
						memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
						memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
						memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
						break;
					case 0x00: case 0x1e988:
						if (writeok == 1) break;
						writeok = 1;
						for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
						memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
						memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
						break;
					default:
#ifdef PSXMEM_LOG
						PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
#endif
						break;
				}
			}
		}
	}
}

void *psxMemPointer(u32 mem) {
	char *p;
	u32 t;

	t = mem >> 16;
	if (t == 0x1f80) {
		if (mem < 0x1f801000)
			return (void *)&psxH[mem];
		else
			return NULL;
	} else {
		p = (char *)(psxMemWLUT[t]);
		if (p != NULL) {
			return (void *)(p + (mem & 0xffff));
		}
		return NULL;
	}
}
Commit	Line	Data
ef79bbde P	1	/***************************************************************************
	2	* Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team *
	3	* *
	4	* This program is free software; you can redistribute it and/or modify *
	5	* it under the terms of the GNU General Public License as published by *
	6	* the Free Software Foundation; either version 2 of the License, or *
	7	* (at your option) any later version. *
	8	* *
	9	* This program is distributed in the hope that it will be useful, *
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
	12	* GNU General Public License for more details. *
	13	* *
	14	* You should have received a copy of the GNU General Public License *
	15	* along with this program; if not, write to the *
	16	* Free Software Foundation, Inc., *
	17	* 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. *
	18	***************************************************************************/
	19
	20	/*
	21	* PSX memory functions.
	22	*/
	23
	24	// TODO: Implement caches & cycle penalty.
	25
	26	#include "psxmem.h"
	27	#include "r3000a.h"
	28	#include "psxhw.h"
	29	#include <sys/mman.h>
	30
	31	#ifndef MAP_ANONYMOUS
	32	#define MAP_ANONYMOUS MAP_ANON
	33	#endif
	34
	35	s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
	36	s8 *psxP = NULL; // Parallel Port (64K)
	37	s8 *psxR = NULL; // BIOS ROM (512K)
	38	s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
	39
	40	u8 **psxMemWLUT = NULL;
	41	u8 **psxMemRLUT = NULL;
	42
	43	/* Playstation Memory Map (from Playstation doc by Joshua Walker)
	44	0x0000_0000-0x0000_ffff Kernel (64K)
	45	0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
	46
	47	0x1f00_0000-0x1f00_ffff Parallel Port (64K)
	48
	49	0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
	50
	51	0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
	52
	53	0x1fc0_0000-0x1fc7_ffff BIOS (512K)
	54
	55	0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
	56	0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
	57
	58	0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
	59	0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
	60	*/
	61
	62	int psxMemInit() {
	63	int i;
	64
65	psxMemRLUT = (u8 *)malloc(0x10000 sizeof(void *));
66	psxMemWLUT = (u8 *)malloc(0x10000 sizeof(void *));
67	memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
68	memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
69
f95a77f7	70	psxM = mmap((void *)0x80000000, 0x00220000,
ef79bbde P	71	PROT_WRITE \| PROT_READ, MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
	72
	73	psxP = &psxM[0x200000];
	74	psxH = &psxM[0x210000];
	75
a06c1d6e	76	psxR = mmap((void *)0x9fc00000, 0x80000,
a06c1d6e	77	PROT_WRITE \| PROT_READ, MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
ef79bbde P	78
ef79bbde P	79	if (psxMemRLUT == NULL \|\| psxMemWLUT == NULL \|\|
a06c1d6e	80	psxM != (void )0x80000000 \|\| psxR != (void )0x9fc00000 \|\|
a06c1d6e	81	psxP == NULL \|\| psxH == NULL) {
ef79bbde P	82	SysMessage(_("Error allocating memory!"));
	83	return -1;
	84	}
	85
	86	// MemR
	87	for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
	88
	89	memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
	90	memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
	91
	92	psxMemRLUT[0x1f00] = (u8 *)psxP;
	93	psxMemRLUT[0x1f80] = (u8 *)psxH;
	94
	95	for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
	96
	97	memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
	98	memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
	99
	100	// MemW
	101	for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
	102
	103	memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
	104	memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
	105
	106	psxMemWLUT[0x1f00] = (u8 *)psxP;
	107	psxMemWLUT[0x1f80] = (u8 *)psxH;
	108
	109	return 0;
	110	}
	111
	112	void psxMemReset() {
	113	FILE *f = NULL;
	114	char bios[1024];
	115
	116	memset(psxM, 0, 0x00200000);
	117	memset(psxP, 0, 0x00010000);
	118
	119	if (strcmp(Config.Bios, "HLE") != 0) {
	120	sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
	121	f = fopen(bios, "rb");
	122
	123	if (f == NULL) {
	124	SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
	125	memset(psxR, 0, 0x80000);
	126	Config.HLE = TRUE;
	127	} else {
	128	fread(psxR, 1, 0x80000, f);
	129	fclose(f);
	130	Config.HLE = FALSE;
	131	}
	132	} else Config.HLE = TRUE;
	133	}
	134
	135	void psxMemShutdown() {
	136	munmap(psxM, 0x00220000);
a06c1d6e	137	munmap(psxR, 0x80000);
ef79bbde	138
ef79bbde P	139	free(psxMemRLUT);
	140	free(psxMemWLUT);
	141	}
	142
	143	static int writeok = 1;
	144
	145	u8 psxMemRead8(u32 mem) {
	146	char *p;
	147	u32 t;
	148
	149	t = mem >> 16;
	150	if (t == 0x1f80) {
	151	if (mem < 0x1f801000)
	152	return psxHu8(mem);
	153	else
	154	return psxHwRead8(mem);
	155	} else {
	156	p = (char *)(psxMemRLUT[t]);
	157	if (p != NULL) {
	158	if (Config.Debug)
	159	DebugCheckBP((mem & 0xffffff) \| 0x80000000, R1);
	160	return (u8 )(p + (mem & 0xffff));
	161	} else {
	162	#ifdef PSXMEM_LOG
	163	PSXMEM_LOG("err lb %8.8lx\n", mem);
	164	#endif
	165	return 0;
	166	}
	167	}
	168	}
	169
	170	u16 psxMemRead16(u32 mem) {
	171	char *p;
	172	u32 t;
	173
	174	t = mem >> 16;
	175	if (t == 0x1f80) {
	176	if (mem < 0x1f801000)
	177	return psxHu16(mem);
	178	else
	179	return psxHwRead16(mem);
	180	} else {
	181	p = (char *)(psxMemRLUT[t]);
	182	if (p != NULL) {
	183	if (Config.Debug)
	184	DebugCheckBP((mem & 0xffffff) \| 0x80000000, R2);
	185	return SWAPu16((u16 )(p + (mem & 0xffff)));
	186	} else {
	187	#ifdef PSXMEM_LOG
	188	PSXMEM_LOG("err lh %8.8lx\n", mem);
	189	#endif
	190	return 0;
	191	}
	192	}
	193	}
	194
	195	u32 psxMemRead32(u32 mem) {
	196	char *p;
	197	u32 t;
	198
	199	t = mem >> 16;
	200	if (t == 0x1f80) {
	201	if (mem < 0x1f801000)
	202	return psxHu32(mem);
203	else
204	return psxHwRead32(mem);
205	} else {
206	p = (char *)(psxMemRLUT[t]);
207	if (p != NULL) {
208	if (Config.Debug)
209	DebugCheckBP((mem & 0xffffff) \| 0x80000000, R4);
210	return SWAPu32((u32 )(p + (mem & 0xffff)));
211	} else {
212	#ifdef PSXMEM_LOG
213	if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
214	#endif
215	return 0;
216	}
217	}
218	}
219
220	void psxMemWrite8(u32 mem, u8 value) {
221	char *p;
222	u32 t;
223
224	t = mem >> 16;
225	if (t == 0x1f80) {
226	if (mem < 0x1f801000)
227	psxHu8(mem) = value;
228	else
229	psxHwWrite8(mem, value);
230	} else {
231	p = (char *)(psxMemWLUT[t]);
232	if (p != NULL) {
233	if (Config.Debug)
234	DebugCheckBP((mem & 0xffffff) \| 0x80000000, W1);
235	(u8 )(p + (mem & 0xffff)) = value;
236	#ifdef PSXREC
237	psxCpu->Clear((mem & (~3)), 1);
238	#endif
239	} else {
240	#ifdef PSXMEM_LOG
241	PSXMEM_LOG("err sb %8.8lx\n", mem);
242	#endif
243	}
244	}
245	}
246
247	void psxMemWrite16(u32 mem, u16 value) {
248	char *p;
249	u32 t;
250
251	t = mem >> 16;
252	if (t == 0x1f80) {
253	if (mem < 0x1f801000)
254	psxHu16ref(mem) = SWAPu16(value);
255	else
256	psxHwWrite16(mem, value);
257	} else {
258	p = (char *)(psxMemWLUT[t]);
259	if (p != NULL) {
260	if (Config.Debug)
261	DebugCheckBP((mem & 0xffffff) \| 0x80000000, W2);
262	(u16 )(p + (mem & 0xffff)) = SWAPu16(value);
263	#ifdef PSXREC
3e31e934	264	psxCpu->Clear((mem & (~3)), 1);
ef79bbde P	265	#endif
	266	} else {
	267	#ifdef PSXMEM_LOG
	268	PSXMEM_LOG("err sh %8.8lx\n", mem);
	269	#endif
	270	}
	271	}
	272	}
	273
	274	void psxMemWrite32(u32 mem, u32 value) {
	275	char *p;
	276	u32 t;
	277
	278	// if ((mem&0x1fffff) == 0x71E18 \|\| value == 0x48088800) SysPrintf("t2fix!!\n");
	279	t = mem >> 16;
	280	if (t == 0x1f80) {
	281	if (mem < 0x1f801000)
	282	psxHu32ref(mem) = SWAPu32(value);
	283	else
	284	psxHwWrite32(mem, value);
	285	} else {
	286	p = (char *)(psxMemWLUT[t]);
	287	if (p != NULL) {
	288	if (Config.Debug)
	289	DebugCheckBP((mem & 0xffffff) \| 0x80000000, W4);
	290	(u32 )(p + (mem & 0xffff)) = SWAPu32(value);
	291	#ifdef PSXREC
	292	psxCpu->Clear(mem, 1);
	293	#endif
	294	} else {
	295	if (mem != 0xfffe0130) {
	296	#ifdef PSXREC
	297	if (!writeok)
	298	psxCpu->Clear(mem, 1);
	299	#endif
	300
	301	#ifdef PSXMEM_LOG
	302	if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
	303	#endif
	304	} else {
	305	int i;
	306
	307	switch (value) {
	308	case 0x800: case 0x804:
	309	if (writeok == 0) break;
	310	writeok = 0;
	311	memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
	312	memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
	313	memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
	314	break;
	315	case 0x00: case 0x1e988:
	316	if (writeok == 1) break;
	317	writeok = 1;
	318	for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
	319	memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
	320	memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
	321	break;
	322	default:
	323	#ifdef PSXMEM_LOG
	324	PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
	325	#endif
	326	break;
	327	}
	328	}
329	}
330	}
331	}
332
333	void *psxMemPointer(u32 mem) {
334	char *p;
335	u32 t;
336
337	t = mem >> 16;
338	if (t == 0x1f80) {
339	if (mem < 0x1f801000)
340	return (void *)&psxH[mem];
341	else
342	return NULL;
343	} else {
344	p = (char *)(psxMemWLUT[t]);
345	if (p != NULL) {
346	return (void *)(p + (mem & 0xffff));
347	}
348	return NULL;
349	}
350	}