From 3031072ee026088ac5c8a0b9d1e3eb7437dd35ef Mon Sep 17 00:00:00 2001 From: ekeeke31 Date: Fri, 31 Jul 2009 16:37:42 +0000 Subject: [PATCH] added Action Replay hardware emulation (incomplete, need more infos !) added proper region detection for Korean games fixed Game Genie patches remaining active when disactivated --- source/cart_hw/datel.c | 178 ++++++++++++++++++++++++++++++++++++++++ source/cart_hw/ggenie.c | 10 +-- source/gx/gui/menu.c | 1 + source/loadrom.c | 1 + source/mem68k.c | 44 +++++----- source/membnk.c | 4 +- source/memz80.c | 6 +- 7 files changed, 212 insertions(+), 32 deletions(-) create mode 100644 source/cart_hw/datel.c diff --git a/source/cart_hw/datel.c b/source/cart_hw/datel.c new file mode 100644 index 0000000..0ab9fff --- /dev/null +++ b/source/cart_hw/datel.c @@ -0,0 +1,178 @@ +/**************************************************************************** + * Genesis Plus + * Action Replay / Pro Action Replay emulation + * + * Copyright (C) 2009 Eke-Eke (GCN/Wii port) + * + * Based on reverse-engineering done on DATEL softwares + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + ***************************************************************************/ + +#include "shared.h" + +#ifdef TEST_AR +static struct +{ + uint8 enabled; + uint8 rom[0x10000]; + uint16 regs[13]; + uint16 old[4]; + uint16 data[4]; + uint32 addr[4]; +} action_replay; + +static void ar_write_byte(uint32 address, uint32 data); +static void ar_write_regs(uint32 address, uint32 data); +static void ar_write_word(uint32 address, uint32 data); + +void ar_init(void) +{ + memset(&action_replay,0,sizeof(action_replay)); + + /* load Game Genie ROM program */ + FILE *f = fopen("./areplay.bin","rb"); + if (!f) return; + fread(action_replay.rom,1,0x8000,f); + fclose(f); + + /* $0000-$7fff mirrored into $8000-$ffff */ + memcpy(action_replay.rom+0x8000,action_replay.rom,0x8000); + +#ifdef LSB_FIRST + /* Byteswap ROM */ + int i; + uint8 temp; + for(i = 0; i < 0x10000; i += 2) + { + temp = action_replay.rom[i]; + action_replay.rom[i] = action_replay.rom[i+1]; + action_replay.rom[i+1] = temp; + } +#endif + + /* enable registers write */ + m68k_memory_map[1].write16 = ar_write_regs; + + /* set flag */ + action_replay.enabled = 1; +} + +void ar_reset(void) +{ + if (!action_replay.enabled) return; + + /* restore patched ROM */ + int i; + for (i=0; i<4; i++) + { + if (action_replay.addr[i] < 0x400000) + *(uint16 *)(cart_rom + action_replay.addr[i]) = action_replay.old[i]; + } + + /* reset internal state */ + memset(action_replay.regs,0,sizeof(action_replay.regs)); + memset(action_replay.old,0,sizeof(action_replay.old)); + memset(action_replay.data,0,sizeof(action_replay.data)); + memset(action_replay.addr,0,sizeof(action_replay.addr)); + + /* slot 0 is mapped to Action replay ROM */ + m68k_memory_map[0].base = action_replay.rom; + + /* reset RAM handlers */ + for (i=0xe0; i<0x100; i++) + { + m68k_memory_map[i].write8 = NULL; + m68k_memory_map[i].write16 = NULL; + } +} + +static void ar_write_byte(uint32 address, uint32 data) +{ +} + +static void ar_write_word(uint32 address, uint32 data) +{ +} + +static void ar_write_regs(uint32 address, uint32 data) +{ + if ((address > 0x10018) || (action_replay.regs[3] == 0xffff)) + { + m68k_unused_16_w(address,data); + return; + } + + /* register offset */ + int offset = (address >> 1) & 0x0F; + + /* update internal register */ + action_replay.regs[offset] = data; + + /* decode patch value & address on exit */ + if ((offset == 3) && (data == 0xffff)) + { + /* patch data */ + action_replay.data[0] = action_replay.regs[0]; + action_replay.data[1] = action_replay.regs[4]; + action_replay.data[2] = action_replay.regs[7]; + action_replay.data[3] = action_replay.regs[10]; + + /* patch address */ + action_replay.addr[0] = (action_replay.regs[1] | ((action_replay.regs[2] & 0x7f00) << 8)) << 1; + action_replay.addr[1] = (action_replay.regs[5] | ((action_replay.regs[6] & 0x7f00) << 8)) << 1; + action_replay.addr[2] = (action_replay.regs[8] | ((action_replay.regs[9] & 0x7f00) << 8)) << 1; + action_replay.addr[3] = (action_replay.regs[11] | ((action_replay.regs[12] & 0x7f00) << 8)) << 1; + + int i; + for (i=0; i<4; i++) + { + offset = action_replay.addr[i] >> 16; + + /* ROM area */ + if (offset < 0x40) + { + /* store old ROM value */ + action_replay.old[i] = *(uint16 *)(cart_rom + action_replay.addr[i]); + } + /* Work RAM area */ + else if (offset >= 0xe0) + { + /* patch RAM */ + *(uint16 *)(work_ram + (action_replay.addr[i] & 0xffff)) = action_replay.data[i]; + + /* setup handlers */ + m68k_memory_map[offset].write8 = ar_write_byte; + m68k_memory_map[offset].write16 = ar_write_word; + } + } + + for (i=0; i<4; i++) + { + offset = action_replay.addr[i] >> 16; + + /* ROM area */ + if (offset < 0x40) + { + /* patch ROM */ + *(uint16 *)(cart_rom + action_replay.addr[i]) = action_replay.data[i];; + } + } + + /* reads are mapped to Cartridge ROM */ + m68k_memory_map[0].base = cart_rom; + } +} +#endif diff --git a/source/cart_hw/ggenie.c b/source/cart_hw/ggenie.c index 9838984..e8d2cd1 100644 --- a/source/cart_hw/ggenie.c +++ b/source/cart_hw/ggenie.c @@ -64,6 +64,10 @@ void ggenie_init(void) } #endif + /* enable registers write */ + m68k_memory_map[0].write8 = ggenie_write_byte; + m68k_memory_map[0].write16 = ggenie_write_word; + /* set flag */ ggenie.enabled = 1; } @@ -86,12 +90,8 @@ void ggenie_reset(void) memset(ggenie.data,0,sizeof(ggenie.data)); memset(ggenie.addr,0,sizeof(ggenie.addr)); - /* default slot mapping */ - /* reads are mapped to Game Genie ROM */ - /* writes are mapped to Game Genie internal registers */ + /* slot 0 is mapped to Game Genie ROM */ m68k_memory_map[0].base = ggenie.rom; - m68k_memory_map[0].write8 = ggenie_write_byte; - m68k_memory_map[0].write16 = ggenie_write_word; m68k_memory_map[0].read16 = NULL; } diff --git a/source/gx/gui/menu.c b/source/gx/gui/menu.c index f571bea..684329e 100644 --- a/source/gx/gui/menu.c +++ b/source/gx/gui/menu.c @@ -935,6 +935,7 @@ static void systemmenu () else sprintf (items[4].text, "Lock-On: OFF"); if (genromsize || (config.bios_enabled == 3)) { + system_reset (); /* clear any GG patches */ system_init (); audio_init(48000); system_reset (); diff --git a/source/loadrom.c b/source/loadrom.c index 99bf6de..2b1edca 100644 --- a/source/loadrom.c +++ b/source/loadrom.c @@ -347,6 +347,7 @@ void set_region () if (c == 'U') country |= 4; else if (c == 'J') country |= 1; else if (c == 'E') country |= 8; + else if (c == 'K') country |= 1; else if (c < 16) country |= c; else if ((c >= '0') && (c <= '9')) country |= c - '0'; else if ((c >= 'A') && (c <= 'F')) country |= c - 'A' + 10; diff --git a/source/mem68k.c b/source/mem68k.c index 8969a8d..ff2f4ce 100644 --- a/source/mem68k.c +++ b/source/mem68k.c @@ -155,7 +155,7 @@ uint32 z80_read_byte(uint32 address) return zram[address & 0x1fff]; } } - + uint32 z80_read_word(uint32 address) { if (zbusack) return m68k_read_bus_16(address); @@ -179,7 +179,7 @@ uint32 z80_read_word(uint32 address) } } } - + void z80_write_byte(uint32 address, uint32 data) { if (zbusack) @@ -254,9 +254,9 @@ void z80_write_word(uint32 address, uint32 data) } } - + /******* I/O & CTRL ******************************************/ - + uint32 ctrl_io_read_byte(uint32 address) { switch ((address >> 8) & 0xff) @@ -325,14 +325,14 @@ uint32 ctrl_io_read_word(uint32 address) case 0x41: /* BOOTROM */ case 0x44: /* RADICA */ return m68k_read_bus_16(address); - + default: /* Invalid address */ return m68k_lockup_r_16(address); } } void ctrl_io_write_byte(uint32 address, uint32 data) -{ +{ switch ((address >> 8) & 0xff) { case 0x00: /* I/O chip */ @@ -358,7 +358,7 @@ void ctrl_io_write_byte(uint32 address, uint32 data) if (address & 1) { m68k_memory_map[0].base = (data & 1) ? default_rom : bios_rom; - + /* autodetect BIOS ROM file */ if (!(config.bios_enabled & 2)) { @@ -385,22 +385,22 @@ void ctrl_io_write_byte(uint32 address, uint32 data) } void ctrl_io_write_word(uint32 address, uint32 data) -{ +{ switch ((address >> 8) & 0xff) { case 0x00: /* I/O chip */ if (address & 0xe0) m68k_unused_16_w (address, data); else io_write ((address >> 1) & 0x0f, data & 0xff); return; - + case 0x11: /* BUSREQ */ gen_busreq_w ((data >> 8) & 1); return; - + case 0x12: /* RESET */ gen_reset_w ((data >> 8) & 1); return; - + case 0x50: /* SVP REGISTERS */ if (svp) { @@ -433,7 +433,7 @@ void ctrl_io_write_word(uint32 address, uint32 data) memset(cart_rom, 0, genromsize); } return; - + case 0x10: /* MEMORY MODE */ case 0x20: /* MEGA-CD */ case 0x40: /* TMSS */ @@ -456,20 +456,20 @@ uint32 vdp_read_byte(uint32 address) { case 0x00: /* DATA */ return (vdp_data_r() >> 8); - + case 0x01: /* DATA */ return (vdp_data_r() & 0xff); - + case 0x04: /* CTRL */ return ((m68k_read_pcrelative_8(REG_PC) & 0xfc) | ((vdp_ctrl_r() >> 8) & 3)); case 0x05: /* CTRL */ return (vdp_ctrl_r() & 0xff); - + case 0x08: /* HVC */ case 0x0c: return (vdp_hvc_r() >> 8); - + case 0x09: /* HVC */ case 0x0d: return (vdp_hvc_r() & 0xff); @@ -491,14 +491,14 @@ uint32 vdp_read_word(uint32 address) { case 0x00: /* DATA */ return vdp_data_r(); - + case 0x04: /* CTRL */ return ((vdp_ctrl_r() & 0x3FF) | (m68k_read_pcrelative_16(REG_PC) & 0xFC00)); - + case 0x08: /* HVC */ case 0x0c: return vdp_hvc_r(); - + case 0x18: /* Unused */ case 0x1c: return m68k_read_bus_16(address); @@ -525,7 +525,7 @@ void vdp_write_byte(uint32 address, uint32 data) if (address & 1) psg_write(0, data); else m68k_unused_8_w(address, data); return; - + case 0x18: /* Unused */ m68k_unused_8_w(address, data); return; @@ -616,8 +616,8 @@ uint32 pico_read_byte(uint32 address) case 0x12: case 0x13: return 0x80; /* TODO */ - - default: + + default: return m68k_read_bus_8(address); } } diff --git a/source/membnk.c b/source/membnk.c index d5605e3..2bd1478 100644 --- a/source/membnk.c +++ b/source/membnk.c @@ -47,7 +47,7 @@ uint32 zbank_lockup_r(uint32 address) #ifdef LOGERROR error("Z80 bank lockup read %06X\n", address); #endif - gen_running = config.force_dtack; + gen_running = config.force_dtack; return 0xFF; } @@ -56,7 +56,7 @@ void zbank_lockup_w(uint32 address, uint32 data) #ifdef LOGERROR error("Z80 bank lockup write %06X = %02X\n", address, data); #endif - gen_running = config.force_dtack; + gen_running = config.force_dtack; } /* I/O & Control registers */ diff --git a/source/memz80.c b/source/memz80.c index 5292d2b..1034078 100644 --- a/source/memz80.c +++ b/source/memz80.c @@ -47,7 +47,7 @@ static inline void z80_lockup_w(unsigned int address, unsigned int data) #ifdef LOGERROR error("Z80 lockup write %04X = %02X\n", address, data); #endif - gen_running = config.force_dtack; + gen_running = config.force_dtack; } static inline unsigned int z80_lockup_r(unsigned int address) @@ -67,13 +67,13 @@ static inline unsigned int z80_vdp_r(unsigned int address) { case 0x00: /* DATA */ return (vdp_data_r() >> 8); - + case 0x01: /* DATA */ return (vdp_data_r() & 0xff); case 0x04: /* CTRL */ return (0xfc | ((vdp_ctrl_r() >> 8) & 3)); - + case 0x05: /* CTRL */ return (vdp_ctrl_r() & 0xff);