[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, 0x00210000,
		PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

	psxP = &psxM[0x200000];
	psxH = mmap((void *)0x1f800000, 0x00010000,
		PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

	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 != (void *)0x1f800000) {
		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
ffb0b9e0	71	psxM = mmap((void *)0x80000000, 0x00210000,
ef79bbde P	72	PROT_WRITE \| PROT_READ, MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
	73
	74	psxP = &psxM[0x200000];
ffb0b9e0	75	psxH = mmap((void *)0x1f800000, 0x00010000,
ffb0b9e0	76	PROT_WRITE \| PROT_READ, MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
ef79bbde	77
a06c1d6e	78	psxR = mmap((void *)0x9fc00000, 0x80000,
a06c1d6e	79	PROT_WRITE \| PROT_READ, MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
ef79bbde P	80
ef79bbde P	81	if (psxMemRLUT == NULL \|\| psxMemWLUT == NULL \|\|
a06c1d6e	82	psxM != (void )0x80000000 \|\| psxR != (void )0x9fc00000 \|\|
ffb0b9e0	83	psxP == NULL \|\| psxH != (void *)0x1f800000) {
ef79bbde P	84	SysMessage(_("Error allocating memory!"));
	85	return -1;
	86	}
	87
	88	// MemR
	89	for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
	90
	91	memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
	92	memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
	93
	94	psxMemRLUT[0x1f00] = (u8 *)psxP;
	95	psxMemRLUT[0x1f80] = (u8 *)psxH;
	96
	97	for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
	98
	99	memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
	100	memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
	101
	102	// MemW
	103	for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
	104
	105	memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
	106	memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
	107
	108	psxMemWLUT[0x1f00] = (u8 *)psxP;
	109	psxMemWLUT[0x1f80] = (u8 *)psxH;
	110
	111	return 0;
	112	}
	113
	114	void psxMemReset() {
	115	FILE *f = NULL;
	116	char bios[1024];
	117
	118	memset(psxM, 0, 0x00200000);
	119	memset(psxP, 0, 0x00010000);
	120
	121	if (strcmp(Config.Bios, "HLE") != 0) {
	122	sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
	123	f = fopen(bios, "rb");
	124
	125	if (f == NULL) {
	126	SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
	127	memset(psxR, 0, 0x80000);
	128	Config.HLE = TRUE;
	129	} else {
	130	fread(psxR, 1, 0x80000, f);
	131	fclose(f);
	132	Config.HLE = FALSE;
	133	}
	134	} else Config.HLE = TRUE;
	135	}
	136
	137	void psxMemShutdown() {
	138	munmap(psxM, 0x00220000);
a06c1d6e	139	munmap(psxR, 0x80000);
ef79bbde	140
ef79bbde P	141	free(psxMemRLUT);
	142	free(psxMemWLUT);
	143	}
	144
	145	static int writeok = 1;
	146
	147	u8 psxMemRead8(u32 mem) {
	148	char *p;
	149	u32 t;
	150
	151	t = mem >> 16;
	152	if (t == 0x1f80) {
	153	if (mem < 0x1f801000)
	154	return psxHu8(mem);
	155	else
	156	return psxHwRead8(mem);
	157	} else {
	158	p = (char *)(psxMemRLUT[t]);
	159	if (p != NULL) {
	160	if (Config.Debug)
	161	DebugCheckBP((mem & 0xffffff) \| 0x80000000, R1);
	162	return (u8 )(p + (mem & 0xffff));
	163	} else {
	164	#ifdef PSXMEM_LOG
	165	PSXMEM_LOG("err lb %8.8lx\n", mem);
	166	#endif
	167	return 0;
	168	}
	169	}
	170	}
	171
	172	u16 psxMemRead16(u32 mem) {
	173	char *p;
	174	u32 t;
	175
	176	t = mem >> 16;
	177	if (t == 0x1f80) {
	178	if (mem < 0x1f801000)
	179	return psxHu16(mem);
	180	else
	181	return psxHwRead16(mem);
	182	} else {
	183	p = (char *)(psxMemRLUT[t]);
	184	if (p != NULL) {
	185	if (Config.Debug)
	186	DebugCheckBP((mem & 0xffffff) \| 0x80000000, R2);
	187	return SWAPu16((u16 )(p + (mem & 0xffff)));
	188	} else {
	189	#ifdef PSXMEM_LOG
	190	PSXMEM_LOG("err lh %8.8lx\n", mem);
	191	#endif
	192	return 0;
	193	}
	194	}
	195	}
	196
	197	u32 psxMemRead32(u32 mem) {
	198	char *p;
	199	u32 t;
	200
	201	t = mem >> 16;
	202	if (t == 0x1f80) {
	203	if (mem < 0x1f801000)
	204	return psxHu32(mem);
205	else
206	return psxHwRead32(mem);
207	} else {
208	p = (char *)(psxMemRLUT[t]);
209	if (p != NULL) {
210	if (Config.Debug)
211	DebugCheckBP((mem & 0xffffff) \| 0x80000000, R4);
212	return SWAPu32((u32 )(p + (mem & 0xffff)));
213	} else {
214	#ifdef PSXMEM_LOG
215	if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
216	#endif
217	return 0;
218	}
219	}
220	}
221
222	void psxMemWrite8(u32 mem, u8 value) {
223	char *p;
224	u32 t;
225
226	t = mem >> 16;
227	if (t == 0x1f80) {
228	if (mem < 0x1f801000)
229	psxHu8(mem) = value;
230	else
231	psxHwWrite8(mem, value);
232	} else {
233	p = (char *)(psxMemWLUT[t]);
234	if (p != NULL) {
235	if (Config.Debug)
236	DebugCheckBP((mem & 0xffffff) \| 0x80000000, W1);
237	(u8 )(p + (mem & 0xffff)) = value;
238	#ifdef PSXREC
239	psxCpu->Clear((mem & (~3)), 1);
240	#endif
241	} else {
242	#ifdef PSXMEM_LOG
243	PSXMEM_LOG("err sb %8.8lx\n", mem);
244	#endif
245	}
246	}
247	}
248
249	void psxMemWrite16(u32 mem, u16 value) {
250	char *p;
251	u32 t;
252
253	t = mem >> 16;
254	if (t == 0x1f80) {
255	if (mem < 0x1f801000)
256	psxHu16ref(mem) = SWAPu16(value);
257	else
258	psxHwWrite16(mem, value);
259	} else {
260	p = (char *)(psxMemWLUT[t]);
261	if (p != NULL) {
262	if (Config.Debug)
263	DebugCheckBP((mem & 0xffffff) \| 0x80000000, W2);
264	(u16 )(p + (mem & 0xffff)) = SWAPu16(value);
265	#ifdef PSXREC
3e31e934	266	psxCpu->Clear((mem & (~3)), 1);
ef79bbde P	267	#endif
	268	} else {
	269	#ifdef PSXMEM_LOG
	270	PSXMEM_LOG("err sh %8.8lx\n", mem);
	271	#endif
	272	}
	273	}
	274	}
	275
	276	void psxMemWrite32(u32 mem, u32 value) {
	277	char *p;
	278	u32 t;
	279
	280	// if ((mem&0x1fffff) == 0x71E18 \|\| value == 0x48088800) SysPrintf("t2fix!!\n");
	281	t = mem >> 16;
	282	if (t == 0x1f80) {
	283	if (mem < 0x1f801000)
	284	psxHu32ref(mem) = SWAPu32(value);
	285	else
	286	psxHwWrite32(mem, value);
	287	} else {
	288	p = (char *)(psxMemWLUT[t]);
	289	if (p != NULL) {
	290	if (Config.Debug)
	291	DebugCheckBP((mem & 0xffffff) \| 0x80000000, W4);
	292	(u32 )(p + (mem & 0xffff)) = SWAPu32(value);
	293	#ifdef PSXREC
	294	psxCpu->Clear(mem, 1);
	295	#endif
	296	} else {
	297	if (mem != 0xfffe0130) {
	298	#ifdef PSXREC
	299	if (!writeok)
	300	psxCpu->Clear(mem, 1);
	301	#endif
	302
	303	#ifdef PSXMEM_LOG
	304	if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
	305	#endif
	306	} else {
	307	int i;
	308
	309	switch (value) {
	310	case 0x800: case 0x804:
	311	if (writeok == 0) break;
	312	writeok = 0;
	313	memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
	314	memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
	315	memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
	316	break;
	317	case 0x00: case 0x1e988:
	318	if (writeok == 1) break;
	319	writeok = 1;
	320	for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
	321	memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
	322	memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
	323	break;
	324	default:
	325	#ifdef PSXMEM_LOG
	326	PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
	327	#endif
	328	break;
	329	}
	330	}
331	}
332	}
333	}
334
335	void *psxMemPointer(u32 mem) {
336	char *p;
337	u32 t;
338
339	t = mem >> 16;
340	if (t == 0x1f80) {
341	if (mem < 0x1f801000)
342	return (void *)&psxH[mem];
343	else
344	return NULL;
345	} else {
346	p = (char *)(psxMemWLUT[t]);
347	if (p != NULL) {
348	return (void *)(p + (mem & 0xffff));
349	}
350	return NULL;
351	}
352	}