The-Homebrew-Cloud/Genesis-Plus-GX
2
0
Fork 0
mirror of https://github.com/ekeeke/Genesis-Plus-GX.git synced 2025-01-13 19:59:07 +01:00
Code Issues Packages Projects Releases Wiki Activity

[Core/MD] fixed Sonic The Hedgehog 3 lock-on support regression introduced in 4bb149ba0b

Browse Source
This commit is contained in:
ekeeke 2023-07-24 23:14:20 +02:00
parent a8d61b0391
commit 091b4124a8
1 changed files with 21 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
core/cart_hw/md_cart.c
View File

@ -408,13 +408,17 @@ void md_cart_init(void)
/* SRAM is mapped by default unless it overlaps with ROM area (Phantasy Star 4, Beyond Oasis/Legend of Thor, World Series Baseball 9x, Duke Nukem 3D,...) */
if (sram.start >= cart.romsize)
{
m68k.memory_map[sram.start >> 16].base = sram.sram;
m68k.memory_map[sram.start >> 16].read8 = sram_read_byte;
m68k.memory_map[sram.start >> 16].read16 = sram_read_word;
m68k.memory_map[sram.start >> 16].write8 = sram_write_byte;
m68k.memory_map[sram.start >> 16].write16 = sram_write_word;
zbank_memory_map[sram.start >> 16].read = sram_read_byte;
zbank_memory_map[sram.start >> 16].write = sram_write_byte;
/* except for Sonic the Hedgehog 3 (cartridge ROM mirrored in upper 2MB area at power on) */
if (strstr(rominfo.international,"SONIC THE HEDGEHOG 3") == NULL)
{
m68k.memory_map[sram.start >> 16].base = sram.sram;
m68k.memory_map[sram.start >> 16].read8 = sram_read_byte;
m68k.memory_map[sram.start >> 16].read16 = sram_read_word;
m68k.memory_map[sram.start >> 16].write8 = sram_write_byte;
m68k.memory_map[sram.start >> 16].write16 = sram_write_word;
zbank_memory_map[sram.start >> 16].read = sram_read_byte;
zbank_memory_map[sram.start >> 16].write = sram_write_byte;
}
}
/* support for Triple Play 96 & Triple Play - Gold Edition mapping */
@ -1043,6 +1047,16 @@ static void mapper_sega_w(uint32 data)
m68k.memory_map[0x20].write8 = m68k_unused_8_w;
m68k.memory_map[0x20].write16 = m68k_unused_16_w;
zbank_memory_map[0x20].write = zbank_unused_w;
/* S&K lock-on chip */
if (cart.special & HW_LOCK_ON)
{
/* cartridge ROM mapped to $300000-$3fffff */
for (i=0x30; i<0x40; i++)
{
m68k.memory_map[i].base = cart.rom + ((i<<16) & cart.mask);
}
}
}
}