From 6fb0c7a7a53e1eba7a0f5dc5b1ade312a0d76119 Mon Sep 17 00:00:00 2001 From: Toad King Date: Thu, 14 Jun 2012 03:21:06 -0400 Subject: initial pocketsnes commit --- src/cheats.cpp | 391 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 391 insertions(+) create mode 100644 src/cheats.cpp (limited to 'src/cheats.cpp') diff --git a/src/cheats.cpp b/src/cheats.cpp new file mode 100644 index 0000000..966e0b9 --- /dev/null +++ b/src/cheats.cpp @@ -0,0 +1,391 @@ +/* + * Snes9x - Portable Super Nintendo Entertainment System (TM) emulator. + * + * (c) Copyright 1996 - 2001 Gary Henderson (gary.henderson@ntlworld.com) and + * Jerremy Koot (jkoot@snes9x.com) + * + * Super FX C emulator code + * (c) Copyright 1997 - 1999 Ivar (ivar@snes9x.com) and + * Gary Henderson. + * Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_. + * + * DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson. + * C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_. + * C4 C code (c) Copyright 2001 Gary Henderson (gary.henderson@ntlworld.com). + * + * DOS port code contains the works of other authors. See headers in + * individual files. + * + * Snes9x homepage: http://www.snes9x.com + * + * Permission to use, copy, modify and distribute Snes9x in both binary and + * source form, for non-commercial purposes, is hereby granted without fee, + * providing that this license information and copyright notice appear with + * all copies and any derived work. + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event shall the authors be held liable for any damages + * arising from the use of this software. + * + * Snes9x is freeware for PERSONAL USE only. Commercial users should + * seek permission of the copyright holders first. Commercial use includes + * charging money for Snes9x or software derived from Snes9x. + * + * The copyright holders request that bug fixes and improvements to the code + * should be forwarded to them so everyone can benefit from the modifications + * in future versions. + * + * Super NES and Super Nintendo Entertainment System are trademarks of + * Nintendo Co., Limited and its subsidiary companies. + */ +#include +#include +#include +#include "snes9x.h" +#include "cheats.h" +#include "memmap.h" + +static bool8 S9xAllHex (const char *code, int len) +{ + for (int i = 0; i < len; i++) + if ((code [i] < '0' || code [i] > '9') && + (code [i] < 'a' || code [i] > 'f') && + (code [i] < 'A' || code [i] > 'F')) + return (FALSE); + + return (TRUE); +} + +const char *S9xProActionReplayToRaw (const char *code, uint32 &address, uint8 &byte) +{ + uint32 data = 0; + if (strlen (code) != 8 || !S9xAllHex (code, 8) || + sscanf (code, "%x", &data) != 1) + return ("Invalid Pro Action Replay code - should be 8 hex digits in length."); + + address = data >> 8; + byte = (uint8) data; + return (NULL); +} + +const char *S9xGoldFingerToRaw (const char *code, uint32 &address, bool8 &sram, + uint8 &num_bytes, uint8 bytes[3]) +{ + char tmp [15]; + if (strlen (code) != 14) + return ("Invalid Gold Finger code should be 14 hex digits in length."); + + strncpy (tmp, code, 5); + tmp [5] = 0; + if (sscanf (tmp, "%x", &address) != 1) + return ("Invalid Gold Finger code."); + + int i; + for (i = 0; i < 3; i++) + { + strncpy (tmp, code + 5 + i * 2, 2); + tmp [2] = 0; + int byte; + if (sscanf (tmp, "%x", &byte) != 1) + break; + bytes [i] = (uint8) byte; + } + num_bytes = i; + sram = code [13] == '1'; + return (NULL); +} + +const char *S9xGameGenieToRaw (const char *code, uint32 &address, uint8 &byte) +{ + char new_code [12]; + + if (strlen (code) != 9 || *(code + 4) != '-' || !S9xAllHex (code, 4) || + !S9xAllHex (code + 5, 4)) + return ("Invalid Game Genie(tm) code - should be 'xxxx-xxxx'."); + + strcpy (new_code, "0x"); + strncpy (new_code + 2, code, 4); + strcpy (new_code + 6, code + 5); + + static char *real_hex = "0123456789ABCDEF"; + static char *genie_hex = "DF4709156BC8A23E"; + + for (int i = 2; i < 10; i++) + { + if (islower (new_code [i])) + new_code [i] = toupper (new_code [i]); + int j; + for (j = 0; j < 16; j++) + { + if (new_code [i] == genie_hex [j]) + { + new_code [i] = real_hex [j]; + break; + } + } + if (j == 16) + return ("Invalid hex-character in Game Genie(tm) code"); + } + uint32 data = 0; + sscanf (new_code, "%x", &data); + byte = (uint8)(data >> 24); + address = data & 0xffffff; + address = ((address & 0x003c00) << 10) + + ((address & 0x00003c) << 14) + + ((address & 0xf00000) >> 8) + + ((address & 0x000003) << 10) + + ((address & 0x00c000) >> 6) + + ((address & 0x0f0000) >> 12) + + ((address & 0x0003c0) >> 6); + + return (NULL); +} + +void S9xStartCheatSearch (SCheatData *d) +{ + memmove (d->CWRAM, d->RAM, 0x20000); + memmove (d->CSRAM, d->SRAM, 0x10000); + memmove (d->CIRAM, &d->FillRAM [0x3000], 0x2000); + memset ((char *) d->WRAM_BITS, 0xff, 0x20000 >> 3); + memset ((char *) d->SRAM_BITS, 0xff, 0x10000 >> 3); + memset ((char *) d->IRAM_BITS, 0xff, 0x2000 >> 3); +} + +#define BIT_CLEAR(a,v) \ +(a)[(v) >> 5] &= ~(1 << ((v) & 31)) + +#define BIT_SET(a,v) \ +(a)[(v) >> 5] |= 1 << ((v) & 31) + +#define TEST_BIT(a,v) \ +((a)[(v) >> 5] & (1 << ((v) & 31))) + +#define _C(c,a,b) \ +((c) == S9X_LESS_THAN ? (a) < (b) : \ + (c) == S9X_GREATER_THAN ? (a) > (b) : \ + (c) == S9X_LESS_THAN_OR_EQUAL ? (a) <= (b) : \ + (c) == S9X_GREATER_THAN_OR_EQUAL ? (a) >= (b) : \ + (c) == S9X_EQUAL ? (a) == (b) : \ + (a) != (b)) + +#define _D(s,m,o) \ +((s) == S9X_8_BITS ? (uint8) (*((m) + (o))) : \ + (s) == S9X_16_BITS ? ((uint16) (*((m) + (o)) + (*((m) + (o) + 1) << 8))) : \ + (s) == S9X_24_BITS ? ((uint32) (*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16))) : \ +((uint32) (*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16) + (*((m) + (o) + 3) << 24)))) + +#define _DS(s,m,o) \ +((s) == S9X_8_BITS ? ((int8) *((m) + (o))) : \ + (s) == S9X_16_BITS ? ((int16) (*((m) + (o)) + (*((m) + (o) + 1) << 8))) : \ + (s) == S9X_24_BITS ? (((int32) ((*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16)) << 8)) >> 8): \ + ((int32) (*((m) + (o)) + (*((m) + (o) + 1) << 8) + (*((m) + (o) + 2) << 16) + (*((m) + (o) + 3) << 24)))) + +void S9xSearchForChange (SCheatData *d, S9xCheatComparisonType cmp, + S9xCheatDataSize size, bool8 is_signed, bool8 update) +{ + int l; + + switch (size) + { + case S9X_8_BITS: l = 0; break; + case S9X_16_BITS: l = 1; break; + case S9X_24_BITS: l = 2; break; + default: + case S9X_32_BITS: l = 3; break; + } + + int i; + if (is_signed) + { + for (i = 0; i < 0x20000 - l; i++) + { + if (TEST_BIT (d->WRAM_BITS, i) && + _C(cmp, _DS(size, d->RAM, i), _DS(size, d->CWRAM, i))) + { + if (update) + d->CWRAM [i] = d->RAM [i]; + } + else + BIT_CLEAR (d->WRAM_BITS, i); + } + + for (i = 0; i < 0x10000 - l; i++) + { + if (TEST_BIT (d->SRAM_BITS, i) && + _C(cmp, _DS(size, d->SRAM, i), _DS(size, d->CSRAM, i))) + { + if (update) + d->CSRAM [i] = d->SRAM [i]; + } + else + BIT_CLEAR (d->SRAM_BITS, i); + } + + for (i = 0; i < 0x2000 - l; i++) + { + if (TEST_BIT (d->IRAM_BITS, i) && + _C(cmp, _DS(size, d->FillRAM + 0x3000, i), _DS(size, d->CIRAM, i))) + { + if (update) + d->CIRAM [i] = d->FillRAM [i + 0x3000]; + } + else + BIT_CLEAR (d->IRAM_BITS, i); + } + } + else + { + for (i = 0; i < 0x20000 - l; i++) + { + if (TEST_BIT (d->WRAM_BITS, i) && + _C(cmp, _D(size, d->RAM, i), _D(size, d->CWRAM, i))) + { + if (update) + d->CWRAM [i] = d->RAM [i]; + } + else + BIT_CLEAR (d->WRAM_BITS, i); + } + + for (i = 0; i < 0x10000 - l; i++) + { + if (TEST_BIT (d->SRAM_BITS, i) && + _C(cmp, _D(size, d->SRAM, i), _D(size, d->CSRAM, i))) + { + if (update) + d->CSRAM [i] = d->SRAM [i]; + } + else + BIT_CLEAR (d->SRAM_BITS, i); + } + + for (i = 0; i < 0x2000 - l; i++) + { + if (TEST_BIT (d->IRAM_BITS, i) && + _C(cmp, _D(size, d->FillRAM + 0x3000, i), _D(size, d->CIRAM, i))) + { + if (update) + d->CIRAM [i] = d->FillRAM [i + 0x3000]; + } + else + BIT_CLEAR (d->IRAM_BITS, i); + } + } +} + +void S9xSearchForValue (SCheatData *d, S9xCheatComparisonType cmp, + S9xCheatDataSize size, uint32 value, + bool8 is_signed, bool8 update) +{ + int l; + + switch (size) + { + case S9X_8_BITS: l = 0; break; + case S9X_16_BITS: l = 1; break; + case S9X_24_BITS: l = 2; break; + default: + case S9X_32_BITS: l = 3; break; + } + + int i; + + if (is_signed) + { + for (i = 0; i < 0x20000 - l; i++) + { + if (TEST_BIT (d->WRAM_BITS, i) && + _C(cmp, _DS(size, d->RAM, i), (int32) value)) + { + if (update) + d->CWRAM [i] = d->RAM [i]; + } + else + BIT_CLEAR (d->WRAM_BITS, i); + } + + for (i = 0; i < 0x10000 - l; i++) + { + if (TEST_BIT (d->SRAM_BITS, i) && + _C(cmp, _DS(size, d->SRAM, i), (int32) value)) + { + if (update) + d->CSRAM [i] = d->SRAM [i]; + } + else + BIT_CLEAR (d->SRAM_BITS, i); + } + + for (i = 0; i < 0x2000 - l; i++) + { + if (TEST_BIT (d->IRAM_BITS, i) && + _C(cmp, _DS(size, d->FillRAM + 0x3000, i), (int32) value)) + { + if (update) + d->CIRAM [i] = d->FillRAM [i + 0x3000]; + } + else + BIT_CLEAR (d->IRAM_BITS, i); + } + } + else + { + for (i = 0; i < 0x20000 - l; i++) + { + if (TEST_BIT (d->WRAM_BITS, i) && + _C(cmp, _D(size, d->RAM, i), value)) + { + if (update) + d->CWRAM [i] = d->RAM [i]; + } + else + BIT_CLEAR (d->WRAM_BITS, i); + } + + for (i = 0; i < 0x10000 - l; i++) + { + if (TEST_BIT (d->SRAM_BITS, i) && + _C(cmp, _D(size, d->SRAM, i), value)) + { + if (update) + d->CSRAM [i] = d->SRAM [i]; + } + else + BIT_CLEAR (d->SRAM_BITS, i); + } + + for (i = 0; i < 0x2000 - l; i++) + { + if (TEST_BIT (d->IRAM_BITS, i) && + _C(cmp, _D(size, d->FillRAM + 0x3000, i), value)) + { + if (update) + d->CIRAM [i] = d->FillRAM [i + 0x3000]; + } + else + BIT_CLEAR (d->IRAM_BITS, i); + } + } +} + +void S9xOutputCheatSearchResults (SCheatData *d) +{ + int i; + for (i = 0; i < 0x20000; i++) + { + if (TEST_BIT (d->WRAM_BITS, i)) + printf ("WRAM: %05x: %02x\n", i, d->RAM [i]); + } + + for (i = 0; i < 0x10000; i++) + { + if (TEST_BIT (d->SRAM_BITS, i)) + printf ("SRAM: %04x: %02x\n", i, d->SRAM [i]); + } + + for (i = 0; i < 0x2000; i++) + { + if (TEST_BIT (d->IRAM_BITS, i)) + printf ("IRAM: %05x: %02x\n", i, d->FillRAM [i + 0x3000]); + } +} -- cgit v1.2.3