[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 "debug.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"
fc8145b7	29	#include "debug.h"
ef79bbde P	30	#include <sys/mman.h>
	31
	32	#ifndef MAP_ANONYMOUS
	33	#define MAP_ANONYMOUS MAP_ANON
	34	#endif
	35
	36	s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
	37	s8 *psxP = NULL; // Parallel Port (64K)
	38	s8 *psxR = NULL; // BIOS ROM (512K)
	39	s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
	40
	41	u8 **psxMemWLUT = NULL;
	42	u8 **psxMemRLUT = NULL;
	43
	44	/* Playstation Memory Map (from Playstation doc by Joshua Walker)
	45	0x0000_0000-0x0000_ffff Kernel (64K)
	46	0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
	47
	48	0x1f00_0000-0x1f00_ffff Parallel Port (64K)
	49
	50	0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
	51
	52	0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
	53
	54	0x1fc0_0000-0x1fc7_ffff BIOS (512K)
	55
	56	0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
	57	0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
	58
	59	0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
	60	0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
	61	*/
	62
	63	int psxMemInit() {
	64	int i;
	65
	66	psxMemRLUT = (u8 *)malloc(0x10000 sizeof(void *));
	67	psxMemWLUT = (u8 *)malloc(0x10000 sizeof(void *));
	68	memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
	69	memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
	70
f95a77f7	71	psxM = mmap((void *)0x80000000, 0x00220000,
ef79bbde P	72	PROT_WRITE \| PROT_READ, MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
	73
	74	psxP = &psxM[0x200000];
	75	psxH = &psxM[0x210000];
	76
a06c1d6e	77	psxR = mmap((void *)0x9fc00000, 0x80000,
a06c1d6e	78	PROT_WRITE \| PROT_READ, MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
ef79bbde P	79
ef79bbde P	80	if (psxMemRLUT == NULL \|\| psxMemWLUT == NULL \|\|
a06c1d6e	81	psxM != (void )0x80000000 \|\| psxR != (void )0x9fc00000 \|\|
a06c1d6e	82	psxP == NULL \|\| psxH == NULL) {
ef79bbde P	83	SysMessage(_("Error allocating memory!"));
	84	return -1;
	85	}
	86
	87	// MemR
	88	for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
	89
	90	memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
	91	memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
	92
	93	psxMemRLUT[0x1f00] = (u8 *)psxP;
	94	psxMemRLUT[0x1f80] = (u8 *)psxH;
	95
	96	for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
	97
	98	memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
	99	memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
	100
	101	// MemW
	102	for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
	103
	104	memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
	105	memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
	106
	107	psxMemWLUT[0x1f00] = (u8 *)psxP;
	108	psxMemWLUT[0x1f80] = (u8 *)psxH;
	109
	110	return 0;
	111	}
	112
	113	void psxMemReset() {
	114	FILE *f = NULL;
	115	char bios[1024];
	116
	117	memset(psxM, 0, 0x00200000);
	118	memset(psxP, 0, 0x00010000);
	119
	120	if (strcmp(Config.Bios, "HLE") != 0) {
	121	sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
	122	f = fopen(bios, "rb");
	123
	124	if (f == NULL) {
	125	SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
	126	memset(psxR, 0, 0x80000);
	127	Config.HLE = TRUE;
	128	} else {
	129	fread(psxR, 1, 0x80000, f);
	130	fclose(f);
	131	Config.HLE = FALSE;
	132	}
	133	} else Config.HLE = TRUE;
	134	}
	135
	136	void psxMemShutdown() {
	137	munmap(psxM, 0x00220000);
a06c1d6e	138	munmap(psxR, 0x80000);
ef79bbde	139
ef79bbde P	140	free(psxMemRLUT);
	141	free(psxMemWLUT);
	142	}
	143
	144	static int writeok = 1;
	145
	146	u8 psxMemRead8(u32 mem) {
	147	char *p;
	148	u32 t;
	149
	150	t = mem >> 16;
	151	if (t == 0x1f80) {
	152	if (mem < 0x1f801000)
	153	return psxHu8(mem);
	154	else
	155	return psxHwRead8(mem);
	156	} else {
	157	p = (char *)(psxMemRLUT[t]);
	158	if (p != NULL) {
	159	if (Config.Debug)
	160	DebugCheckBP((mem & 0xffffff) \| 0x80000000, R1);
	161	return (u8 )(p + (mem & 0xffff));
	162	} else {
	163	#ifdef PSXMEM_LOG
	164	PSXMEM_LOG("err lb %8.8lx\n", mem);
	165	#endif
	166	return 0;
	167	}
	168	}
	169	}
	170
	171	u16 psxMemRead16(u32 mem) {
	172	char *p;
	173	u32 t;
	174
	175	t = mem >> 16;
	176	if (t == 0x1f80) {
	177	if (mem < 0x1f801000)
	178	return psxHu16(mem);
	179	else
	180	return psxHwRead16(mem);
	181	} else {
	182	p = (char *)(psxMemRLUT[t]);
	183	if (p != NULL) {
	184	if (Config.Debug)
	185	DebugCheckBP((mem & 0xffffff) \| 0x80000000, R2);
	186	return SWAPu16((u16 )(p + (mem & 0xffff)));
	187	} else {
	188	#ifdef PSXMEM_LOG
	189	PSXMEM_LOG("err lh %8.8lx\n", mem);
	190	#endif
	191	return 0;
	192	}
	193	}
	194	}
	195
	196	u32 psxMemRead32(u32 mem) {
	197	char *p;
	198	u32 t;
	199
	200	t = mem >> 16;
	201	if (t == 0x1f80) {
	202	if (mem < 0x1f801000)
	203	return psxHu32(mem);
204	else
205	return psxHwRead32(mem);
206	} else {
207	p = (char *)(psxMemRLUT[t]);
208	if (p != NULL) {
209	if (Config.Debug)
210	DebugCheckBP((mem & 0xffffff) \| 0x80000000, R4);
211	return SWAPu32((u32 )(p + (mem & 0xffff)));
212	} else {
213	#ifdef PSXMEM_LOG
214	if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
215	#endif
216	return 0;
217	}
218	}
219	}
220
221	void psxMemWrite8(u32 mem, u8 value) {
222	char *p;
223	u32 t;
224
225	t = mem >> 16;
226	if (t == 0x1f80) {
227	if (mem < 0x1f801000)
228	psxHu8(mem) = value;
229	else
230	psxHwWrite8(mem, value);
231	} else {
232	p = (char *)(psxMemWLUT[t]);
233	if (p != NULL) {
234	if (Config.Debug)
235	DebugCheckBP((mem & 0xffffff) \| 0x80000000, W1);
236	(u8 )(p + (mem & 0xffff)) = value;
237	#ifdef PSXREC
238	psxCpu->Clear((mem & (~3)), 1);
239	#endif
240	} else {
241	#ifdef PSXMEM_LOG
242	PSXMEM_LOG("err sb %8.8lx\n", mem);
243	#endif
244	}
245	}
246	}
247
248	void psxMemWrite16(u32 mem, u16 value) {
249	char *p;
250	u32 t;
251
252	t = mem >> 16;
253	if (t == 0x1f80) {
254	if (mem < 0x1f801000)
255	psxHu16ref(mem) = SWAPu16(value);
256	else
257	psxHwWrite16(mem, value);
258	} else {
259	p = (char *)(psxMemWLUT[t]);
260	if (p != NULL) {
261	if (Config.Debug)
262	DebugCheckBP((mem & 0xffffff) \| 0x80000000, W2);
263	(u16 )(p + (mem & 0xffff)) = SWAPu16(value);
264	#ifdef PSXREC
3e31e934	265	psxCpu->Clear((mem & (~3)), 1);
ef79bbde P	266	#endif
	267	} else {
	268	#ifdef PSXMEM_LOG
	269	PSXMEM_LOG("err sh %8.8lx\n", mem);
	270	#endif
	271	}
	272	}
	273	}
	274
	275	void psxMemWrite32(u32 mem, u32 value) {
	276	char *p;
	277	u32 t;
	278
	279	// if ((mem&0x1fffff) == 0x71E18 \|\| value == 0x48088800) SysPrintf("t2fix!!\n");
	280	t = mem >> 16;
	281	if (t == 0x1f80) {
	282	if (mem < 0x1f801000)
	283	psxHu32ref(mem) = SWAPu32(value);
	284	else
	285	psxHwWrite32(mem, value);
	286	} else {
	287	p = (char *)(psxMemWLUT[t]);
	288	if (p != NULL) {
	289	if (Config.Debug)
	290	DebugCheckBP((mem & 0xffffff) \| 0x80000000, W4);
	291	(u32 )(p + (mem & 0xffff)) = SWAPu32(value);
	292	#ifdef PSXREC
	293	psxCpu->Clear(mem, 1);
	294	#endif
	295	} else {
	296	if (mem != 0xfffe0130) {
	297	#ifdef PSXREC
	298	if (!writeok)
	299	psxCpu->Clear(mem, 1);
	300	#endif
	301
	302	#ifdef PSXMEM_LOG
	303	if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
	304	#endif
	305	} else {
	306	int i;
	307
	308	switch (value) {
	309	case 0x800: case 0x804:
	310	if (writeok == 0) break;
	311	writeok = 0;
	312	memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
	313	memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
	314	memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
	315	break;
	316	case 0x00: case 0x1e988:
	317	if (writeok == 1) break;
	318	writeok = 1;
	319	for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
	320	memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
	321	memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
	322	break;
	323	default:
	324	#ifdef PSXMEM_LOG
	325	PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
	326	#endif
	327	break;
	328	}
	329	}
330	}
331	}
332	}
333
334	void *psxMemPointer(u32 mem) {
335	char *p;
336	u32 t;
337
338	t = mem >> 16;
339	if (t == 0x1f80) {
340	if (mem < 0x1f801000)
341	return (void *)&psxH[mem];
342	else
343	return NULL;
344	} else {
345	p = (char *)(psxMemWLUT[t]);
346	if (p != NULL) {
347	return (void *)(p + (mem & 0xffff));
348	}
349	return NULL;
350	}
351	}