mirror of
https://github.com/dborth/snes9xgx.git
synced 2024-11-30 22:44:22 +01:00
1478 lines
30 KiB
C++
1478 lines
30 KiB
C++
/*****************************************************************************\
|
|
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
|
|
This file is licensed under the Snes9x License.
|
|
For further information, consult the LICENSE file in the root directory.
|
|
\*****************************************************************************/
|
|
|
|
// Dreamer Nom wrote:
|
|
// Large thanks to John Weidman for all his initial research
|
|
// Thanks to Seph3 for his modem notes
|
|
|
|
|
|
#include "snes9x.h"
|
|
#include "memmap.h"
|
|
#include "display.h"
|
|
#include <math.h>
|
|
|
|
extern bool bsxBiosLoadFailed;
|
|
|
|
//#define BSX_DEBUG
|
|
|
|
#define BIOS_SIZE 0x100000
|
|
#define FLASH_SIZE 0x100000
|
|
#define PSRAM_SIZE 0x80000
|
|
|
|
#define Map Memory.Map
|
|
#define BlockIsRAM Memory.BlockIsRAM
|
|
#define BlockIsROM Memory.BlockIsROM
|
|
#define RAM Memory.RAM
|
|
#define SRAM Memory.SRAM
|
|
#define PSRAM Memory.BSRAM
|
|
#define BIOSROM Memory.BIOSROM
|
|
#define MAP_BSX Memory.MAP_BSX
|
|
#define MAP_CPU Memory.MAP_CPU
|
|
#define MAP_PPU Memory.MAP_PPU
|
|
#define MAP_NONE Memory.MAP_NONE
|
|
|
|
#define BSXPPUBASE 0x2180
|
|
|
|
struct SBSX_RTC
|
|
{
|
|
int year;
|
|
int month;
|
|
int dayweek;
|
|
int day;
|
|
int hours;
|
|
int minutes;
|
|
int seconds;
|
|
int ticks;
|
|
};
|
|
|
|
static struct SBSX_RTC BSX_RTC;
|
|
|
|
// flash card vendor information
|
|
static const uint8 flashcard[20] =
|
|
{
|
|
0x4D, 0x00, 0x50, 0x00, // vendor id
|
|
0x00, 0x00, // ?
|
|
0x1A, 0x00, // 2MB Flash (1MB = 0x2A)
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
|
};
|
|
|
|
#if 0
|
|
static const uint8 init2192[32] = // FIXME
|
|
{
|
|
00, 00, 00, 00, 00, // unknown
|
|
01, 01, 00, 00, 00,
|
|
00, // seconds (?)
|
|
00, // minutes
|
|
00, // hours
|
|
10, 10, 10, 10, 10, // unknown
|
|
10, 10, 10, 10, 10, // dummy
|
|
00, 00, 00, 00, 00, 00, 00, 00, 00
|
|
};
|
|
#endif
|
|
|
|
static bool8 FlashMode;
|
|
static uint32 FlashSize;
|
|
static uint8 *MapROM, *FlashROM;
|
|
|
|
static void BSX_Map_SNES (void);
|
|
static void BSX_Map_LoROM (void);
|
|
static void BSX_Map_HiROM (void);
|
|
static void BSX_Map_MMC (void);
|
|
static void BSX_Map_FlashIO (void);
|
|
static void BSX_Map_SRAM (void);
|
|
static void BSX_Map_PSRAM (void);
|
|
static void BSX_Map_BIOS (void);
|
|
static void BSX_Map_RAM (void);
|
|
static void BSX_Map (void);
|
|
static bool8 BSX_LoadBIOS (void);
|
|
static void map_psram_mirror_sub (uint32);
|
|
static int is_bsx (unsigned char *);
|
|
|
|
|
|
static void BSX_Map_SNES (void)
|
|
{
|
|
// These maps will be partially overwritten
|
|
|
|
int c;
|
|
|
|
// Banks 00->3F and 80->BF
|
|
for (c = 0; c < 0x400; c += 16)
|
|
{
|
|
Map[c + 0] = Map[c + 0x800] = RAM;
|
|
Map[c + 1] = Map[c + 0x801] = RAM;
|
|
BlockIsRAM[c + 0] = BlockIsRAM[c + 0x800] = TRUE;
|
|
BlockIsRAM[c + 1] = BlockIsRAM[c + 0x801] = TRUE;
|
|
|
|
Map[c + 2] = Map[c + 0x802] = (uint8 *) MAP_PPU;
|
|
Map[c + 3] = Map[c + 0x803] = (uint8 *) MAP_PPU;
|
|
Map[c + 4] = Map[c + 0x804] = (uint8 *) MAP_CPU;
|
|
Map[c + 5] = Map[c + 0x805] = (uint8 *) MAP_CPU;
|
|
Map[c + 6] = Map[c + 0x806] = (uint8 *) MAP_NONE;
|
|
Map[c + 7] = Map[c + 0x807] = (uint8 *) MAP_NONE;
|
|
}
|
|
}
|
|
|
|
static void BSX_Map_LoROM (void)
|
|
{
|
|
// These maps will be partially overwritten
|
|
|
|
int i, c;
|
|
|
|
// Banks 00->3F and 80->BF
|
|
for (c = 0; c < 0x400; c += 16)
|
|
{
|
|
for (i = c + 8; i < c + 16; i++)
|
|
{
|
|
Map[i] = Map[i + 0x800] = &MapROM[(c << 11) % FlashSize] - 0x8000;
|
|
BlockIsRAM[i] = BlockIsRAM[i + 0x800] = BSX.write_enable;
|
|
BlockIsROM[i] = BlockIsROM[i + 0x800] = !BSX.write_enable;
|
|
}
|
|
}
|
|
|
|
// Banks 40->7F and C0->FF
|
|
for (c = 0; c < 0x400; c += 16)
|
|
{
|
|
for (i = c; i < c + 8; i++)
|
|
Map[i + 0x400] = Map[i + 0xC00] = &MapROM[(c << 11) % FlashSize];
|
|
|
|
for (i = c + 8; i < c + 16; i++)
|
|
Map[i + 0x400] = Map[i + 0xC00] = &MapROM[(c << 11) % FlashSize] - 0x8000;
|
|
|
|
for (i = c; i < c + 16; i++)
|
|
{
|
|
BlockIsRAM[i + 0x400] = BlockIsRAM[i + 0xC00] = BSX.write_enable;
|
|
BlockIsROM[i + 0x400] = BlockIsROM[i + 0xC00] = !BSX.write_enable;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void BSX_Map_HiROM (void)
|
|
{
|
|
// These maps will be partially overwritten
|
|
|
|
int i, c;
|
|
|
|
// Banks 00->3F and 80->BF
|
|
for (c = 0; c < 0x400; c += 16)
|
|
{
|
|
for (i = c + 8; i < c + 16; i++)
|
|
{
|
|
Map[i] = Map[i + 0x800] = &MapROM[(c << 12) % FlashSize];
|
|
BlockIsRAM[i] = BlockIsRAM[i + 0x800] = BSX.write_enable;
|
|
BlockIsROM[i] = BlockIsROM[i + 0x800] = !BSX.write_enable;
|
|
}
|
|
}
|
|
|
|
// Banks 40->7F and C0->FF
|
|
for (c = 0; c < 0x400; c += 16)
|
|
{
|
|
for (i = c; i < c + 16; i++)
|
|
{
|
|
Map[i + 0x400] = Map[i + 0xC00] = &MapROM[(c << 12) % FlashSize];
|
|
BlockIsRAM[i + 0x400] = BlockIsRAM[i + 0xC00] = BSX.write_enable;
|
|
BlockIsROM[i + 0x400] = BlockIsROM[i + 0xC00] = !BSX.write_enable;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void BSX_Map_MMC (void)
|
|
{
|
|
int c;
|
|
|
|
// Banks 01->0E:5000-5FFF
|
|
for (c = 0x010; c < 0x0F0; c += 16)
|
|
{
|
|
Map[c + 5] = (uint8 *) MAP_BSX;
|
|
BlockIsRAM[c + 5] = BlockIsROM[c + 5] = FALSE;
|
|
}
|
|
}
|
|
|
|
static void BSX_Map_FlashIO (void)
|
|
{
|
|
int i, c;
|
|
|
|
if (BSX.prevMMC[0x0C])
|
|
{
|
|
// Banks 00->3F and 80->BF
|
|
for (c = 0; c < 0x400; c += 16)
|
|
{
|
|
for (i = c + 8; i < c + 16; i++)
|
|
{
|
|
Map[i] = Map[i + 0x800] = (uint8 *)MAP_BSX;
|
|
BlockIsRAM[i] = BlockIsRAM[i + 0x800] = TRUE;
|
|
BlockIsROM[i] = BlockIsROM[i + 0x800] = FALSE;
|
|
}
|
|
}
|
|
|
|
// Banks 40->7F and C0->FF
|
|
for (c = 0; c < 0x400; c += 16)
|
|
{
|
|
for (i = c; i < c + 16; i++)
|
|
{
|
|
Map[i + 0x400] = Map[i + 0xC00] = (uint8 *)MAP_BSX;
|
|
BlockIsRAM[i + 0x400] = BlockIsRAM[i + 0xC00] = TRUE;
|
|
BlockIsROM[i + 0x400] = BlockIsROM[i + 0xC00] = FALSE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void BSX_Map_SRAM (void)
|
|
{
|
|
int c;
|
|
|
|
// Banks 10->17:5000-5FFF
|
|
for (c = 0x100; c < 0x180; c += 16)
|
|
{
|
|
Map[c + 5] = (uint8 *) SRAM + ((c & 0x70) << 8) - 0x5000;
|
|
BlockIsRAM[c + 5] = TRUE;
|
|
BlockIsROM[c + 5] = FALSE;
|
|
}
|
|
}
|
|
|
|
static void map_psram_mirror_sub (uint32 bank)
|
|
{
|
|
int i, c;
|
|
|
|
bank <<= 4;
|
|
|
|
if (BSX.prevMMC[0x02])
|
|
{
|
|
//HiROM
|
|
for (c = 0; c < 0x80; c += 16)
|
|
{
|
|
if ((bank & 0x7F0) >= 0x400)
|
|
{
|
|
for (i = c; i < c + 16; i++)
|
|
{
|
|
Map[i + bank] = &PSRAM[(c << 12) % PSRAM_SIZE];
|
|
BlockIsRAM[i + bank] = TRUE;
|
|
BlockIsROM[i + bank] = FALSE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (i = c + 8; i < c + 16; i++)
|
|
{
|
|
Map[i + bank] = &PSRAM[(c << 12) % PSRAM_SIZE];
|
|
BlockIsRAM[i + bank] = TRUE;
|
|
BlockIsROM[i + bank] = FALSE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//LoROM
|
|
for (c = 0; c < 0x100; c += 16)
|
|
{
|
|
if ((bank & 0x7F0) >= 0x400)
|
|
{
|
|
for (i = c; i < c + 8; i++)
|
|
{
|
|
Map[i + bank] = &PSRAM[(c << 11) % PSRAM_SIZE];
|
|
BlockIsRAM[i + bank] = TRUE;
|
|
BlockIsROM[i + bank] = FALSE;
|
|
}
|
|
}
|
|
|
|
for (i = c + 8; i < c + 16; i++)
|
|
{
|
|
Map[i + bank] = &PSRAM[(c << 11) % PSRAM_SIZE] - 0x8000;
|
|
BlockIsRAM[i + bank] = TRUE;
|
|
BlockIsROM[i + bank] = FALSE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void BSX_Map_PSRAM(void)
|
|
{
|
|
int c;
|
|
|
|
if (!BSX.prevMMC[0x02])
|
|
{
|
|
//LoROM Mode
|
|
if (!BSX.prevMMC[0x05] && !BSX.prevMMC[0x06])
|
|
{
|
|
//Map PSRAM to 00-0F/80-8F
|
|
if (BSX.prevMMC[0x03])
|
|
map_psram_mirror_sub(0x00);
|
|
|
|
if (BSX.prevMMC[0x04])
|
|
map_psram_mirror_sub(0x80);
|
|
}
|
|
else if (BSX.prevMMC[0x05] && !BSX.prevMMC[0x06])
|
|
{
|
|
//Map PSRAM to 20-2F/A0-AF
|
|
if (BSX.prevMMC[0x03])
|
|
map_psram_mirror_sub(0x20);
|
|
|
|
if (BSX.prevMMC[0x04])
|
|
map_psram_mirror_sub(0xA0);
|
|
}
|
|
else if (!BSX.prevMMC[0x05] && BSX.prevMMC[0x06])
|
|
{
|
|
//Map PSRAM to 40-4F/C0-CF
|
|
if (BSX.prevMMC[0x03])
|
|
map_psram_mirror_sub(0x40);
|
|
|
|
if (BSX.prevMMC[0x04])
|
|
map_psram_mirror_sub(0xC0);
|
|
}
|
|
else
|
|
{
|
|
//Map PSRAM to 60-6F/E0-EF
|
|
if (BSX.prevMMC[0x03])
|
|
map_psram_mirror_sub(0x60);
|
|
|
|
if (BSX.prevMMC[0x04])
|
|
map_psram_mirror_sub(0xE0);
|
|
}
|
|
|
|
//Map PSRAM to 70-7D/F0-FF
|
|
if (BSX.prevMMC[0x03])
|
|
map_psram_mirror_sub(0x70);
|
|
|
|
if (BSX.prevMMC[0x04])
|
|
map_psram_mirror_sub(0xF0);
|
|
}
|
|
else
|
|
{
|
|
//HiROM Mode
|
|
if (!BSX.prevMMC[0x05] && !BSX.prevMMC[0x06])
|
|
{
|
|
//Map PSRAM to 00-07/40-47 / 80-87/C0-C7
|
|
if (BSX.prevMMC[0x03])
|
|
{
|
|
map_psram_mirror_sub(0x00);
|
|
map_psram_mirror_sub(0x40);
|
|
}
|
|
|
|
if (BSX.prevMMC[0x04])
|
|
{
|
|
map_psram_mirror_sub(0x80);
|
|
map_psram_mirror_sub(0xC0);
|
|
}
|
|
}
|
|
else if (BSX.prevMMC[0x05] && !BSX.prevMMC[0x06])
|
|
{
|
|
//Map PSRAM to 10-17/50-57 / 90-97-D0-D7
|
|
if (BSX.prevMMC[0x03])
|
|
{
|
|
map_psram_mirror_sub(0x10);
|
|
map_psram_mirror_sub(0x50);
|
|
}
|
|
|
|
if (BSX.prevMMC[0x04])
|
|
{
|
|
map_psram_mirror_sub(0x90);
|
|
map_psram_mirror_sub(0xD0);
|
|
}
|
|
}
|
|
else if (!BSX.prevMMC[0x05] && BSX.prevMMC[0x06])
|
|
{
|
|
//Map PSRAM to 20-27/60-67 / A0-A7/E0-E7
|
|
if (BSX.prevMMC[0x03])
|
|
{
|
|
map_psram_mirror_sub(0x20);
|
|
map_psram_mirror_sub(0x60);
|
|
}
|
|
|
|
if (BSX.prevMMC[0x04])
|
|
{
|
|
map_psram_mirror_sub(0xA0);
|
|
map_psram_mirror_sub(0xE0);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//Map PSRAM to 30-37/70-77 / B0-B7/F0-F7
|
|
if (BSX.prevMMC[0x03])
|
|
{
|
|
map_psram_mirror_sub(0x30);
|
|
map_psram_mirror_sub(0x70);
|
|
}
|
|
|
|
if (BSX.prevMMC[0x04])
|
|
{
|
|
map_psram_mirror_sub(0xB0);
|
|
map_psram_mirror_sub(0xF0);
|
|
}
|
|
}
|
|
|
|
if (BSX.prevMMC[0x03])
|
|
{
|
|
//Map PSRAM to 20->3F:6000-7FFF
|
|
for (c = 0x200; c < 0x400; c += 16)
|
|
{
|
|
Map[c + 6] = &PSRAM[((c & 0x70) << 12) % PSRAM_SIZE];
|
|
Map[c + 7] = &PSRAM[((c & 0x70) << 12) % PSRAM_SIZE];
|
|
BlockIsRAM[c + 6] = TRUE;
|
|
BlockIsRAM[c + 7] = TRUE;
|
|
BlockIsROM[c + 6] = FALSE;
|
|
BlockIsROM[c + 7] = FALSE;
|
|
}
|
|
}
|
|
|
|
if (BSX.prevMMC[0x04])
|
|
{
|
|
//Map PSRAM to A0->BF:6000-7FFF
|
|
for (c = 0xA00; c < 0xC00; c += 16)
|
|
{
|
|
Map[c + 6] = &PSRAM[((c & 0x70) << 12) % PSRAM_SIZE];
|
|
Map[c + 7] = &PSRAM[((c & 0x70) << 12) % PSRAM_SIZE];
|
|
BlockIsRAM[c + 6] = TRUE;
|
|
BlockIsRAM[c + 7] = TRUE;
|
|
BlockIsROM[c + 6] = FALSE;
|
|
BlockIsROM[c + 7] = FALSE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void BSX_Map_BIOS (void)
|
|
{
|
|
int i,c;
|
|
|
|
// Banks 00->1F:8000-FFFF
|
|
if (BSX.prevMMC[0x07])
|
|
{
|
|
for (c = 0; c < 0x200; c += 16)
|
|
{
|
|
for (i = c + 8; i < c + 16; i++)
|
|
{
|
|
Map[i] = &BIOSROM[(c << 11) % BIOS_SIZE] - 0x8000;
|
|
BlockIsRAM[i] = FALSE;
|
|
BlockIsROM[i] = TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Banks 80->9F:8000-FFFF
|
|
if (BSX.prevMMC[0x08])
|
|
{
|
|
for (c = 0; c < 0x200; c += 16)
|
|
{
|
|
for (i = c + 8; i < c + 16; i++)
|
|
{
|
|
Map[i + 0x800] = &BIOSROM[(c << 11) % BIOS_SIZE] - 0x8000;
|
|
BlockIsRAM[i + 0x800] = FALSE;
|
|
BlockIsROM[i + 0x800] = TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void BSX_Map_RAM (void)
|
|
{
|
|
int c;
|
|
|
|
// Banks 7E->7F
|
|
for (c = 0; c < 16; c++)
|
|
{
|
|
Map[c + 0x7E0] = RAM;
|
|
Map[c + 0x7F0] = RAM + 0x10000;
|
|
BlockIsRAM[c + 0x7E0] = TRUE;
|
|
BlockIsRAM[c + 0x7F0] = TRUE;
|
|
BlockIsROM[c + 0x7E0] = FALSE;
|
|
BlockIsROM[c + 0x7F0] = FALSE;
|
|
}
|
|
}
|
|
|
|
static void BSX_Map (void)
|
|
{
|
|
#ifdef BSX_DEBUG
|
|
printf("BS: Remapping\n");
|
|
for (int i = 0; i < 32; i++)
|
|
printf("BS: MMC %02X: %d\n", i, BSX.MMC[i]);
|
|
#endif
|
|
|
|
memcpy(BSX.prevMMC, BSX.MMC, sizeof(BSX.MMC));
|
|
|
|
MapROM = FlashROM;
|
|
FlashSize = FLASH_SIZE;
|
|
|
|
if (BSX.prevMMC[0x02])
|
|
BSX_Map_HiROM();
|
|
else
|
|
BSX_Map_LoROM();
|
|
|
|
BSX_Map_FlashIO();
|
|
BSX_Map_PSRAM();
|
|
|
|
BSX_Map_SNES();
|
|
BSX_Map_SRAM();
|
|
BSX_Map_RAM();
|
|
|
|
BSX_Map_BIOS();
|
|
BSX_Map_MMC();
|
|
|
|
// Monitor new register changes
|
|
BSX.dirty = FALSE;
|
|
BSX.dirty2 = FALSE;
|
|
|
|
Memory.map_WriteProtectROM();
|
|
}
|
|
|
|
static uint8 BSX_Get_Bypass_FlashIO (uint32 offset)
|
|
{
|
|
//For games other than BS-X
|
|
FlashROM = Memory.ROM + Multi.cartOffsetB;
|
|
|
|
if (BSX.prevMMC[0x02])
|
|
return (FlashROM[offset & 0x0FFFFF]);
|
|
else
|
|
return (FlashROM[(offset & 0x1F0000) >> 1 | (offset & 0x7FFF)]);
|
|
}
|
|
|
|
static void BSX_Set_Bypass_FlashIO (uint32 offset, uint8 byte)
|
|
{
|
|
//For games other than BS-X
|
|
FlashROM = Memory.ROM + Multi.cartOffsetB;
|
|
|
|
if (BSX.prevMMC[0x02])
|
|
FlashROM[offset & 0x0FFFFF] = FlashROM[offset & 0x0FFFFF] & byte;
|
|
else
|
|
FlashROM[(offset & 0x1F0000) >> 1 | (offset & 0x7FFF)] = FlashROM[(offset & 0x1F0000) >> 1 | (offset & 0x7FFF)] & byte;
|
|
}
|
|
|
|
uint8 S9xGetBSX (uint32 address)
|
|
{
|
|
uint8 bank = (address >> 16) & 0xFF;
|
|
uint16 offset = address & 0xFFFF;
|
|
uint8 t = 0;
|
|
|
|
// MMC
|
|
if ((bank >= 0x01 && bank <= 0x0E) && ((address & 0xF000) == 0x5000))
|
|
return (BSX.MMC[bank]);
|
|
|
|
// Flash Mapping
|
|
|
|
// default: read-through mode
|
|
t = BSX_Get_Bypass_FlashIO(address);
|
|
|
|
// note: may be more registers, purposes unknown
|
|
switch (offset)
|
|
{
|
|
case 0x0002:
|
|
case 0x8002:
|
|
if (BSX.flash_bsr)
|
|
t = 0xC0; // Page Status Register
|
|
break;
|
|
|
|
case 0x0004:
|
|
case 0x8004:
|
|
if (BSX.flash_gsr)
|
|
t = 0x82; // Global Status Register
|
|
break;
|
|
|
|
case 0x5555:
|
|
if (BSX.flash_enable)
|
|
t = 0x80; // ???
|
|
break;
|
|
|
|
case 0xFF00:
|
|
case 0xFF02:
|
|
case 0xFF04:
|
|
case 0xFF06:
|
|
case 0xFF08:
|
|
case 0xFF0A:
|
|
case 0xFF0C:
|
|
case 0xFF0E:
|
|
case 0xFF10:
|
|
case 0xFF12:
|
|
// return flash vendor information
|
|
if (BSX.read_enable)
|
|
t = flashcard[offset - 0xFF00];
|
|
break;
|
|
}
|
|
|
|
if (BSX.flash_csr)
|
|
{
|
|
t = 0x80; // Compatible Status Register
|
|
BSX.flash_csr = false;
|
|
}
|
|
|
|
return (t);
|
|
}
|
|
|
|
void S9xSetBSX (uint8 byte, uint32 address)
|
|
{
|
|
uint8 bank = (address >> 16) & 0xFF;
|
|
|
|
// MMC
|
|
if ((bank >= 0x01 && bank <= 0x0E) && ((address & 0xF000) == 0x5000))
|
|
{
|
|
//Avoid updating the memory map when it is not needed
|
|
if (bank == 0x0E && BSX.dirty)
|
|
{
|
|
BSX_Map();
|
|
BSX.dirty = FALSE;
|
|
}
|
|
else if (bank != 0x0E && BSX.MMC[bank] != byte)
|
|
{
|
|
BSX.dirty = TRUE;
|
|
}
|
|
|
|
BSX.MMC[bank] = byte;
|
|
}
|
|
|
|
// Flash IO
|
|
|
|
// Write to Flash
|
|
if (BSX.write_enable)
|
|
{
|
|
BSX_Set_Bypass_FlashIO(address, byte);
|
|
BSX.write_enable = false;
|
|
return;
|
|
}
|
|
|
|
// Flash Command Handling
|
|
|
|
//Memory Pack Type 1 & 3 & 4
|
|
BSX.flash_command <<= 8;
|
|
BSX.flash_command |= byte;
|
|
|
|
switch (BSX.flash_command & 0xFF)
|
|
{
|
|
case 0x00:
|
|
case 0xFF:
|
|
//Reset to normal
|
|
BSX.flash_enable = false;
|
|
BSX.flash_bsr = false;
|
|
BSX.flash_csr = false;
|
|
BSX.flash_gsr = false;
|
|
BSX.read_enable = false;
|
|
BSX.write_enable = false;
|
|
BSX.flash_cmd_done = true;
|
|
break;
|
|
|
|
case 0x10:
|
|
case 0x40:
|
|
//Write Byte
|
|
BSX.flash_enable = false;
|
|
BSX.flash_bsr = false;
|
|
BSX.flash_csr = true;
|
|
BSX.flash_gsr = false;
|
|
BSX.read_enable = false;
|
|
BSX.write_enable = true;
|
|
BSX.flash_cmd_done = true;
|
|
break;
|
|
|
|
case 0x50:
|
|
//Clear Status Register
|
|
BSX.flash_enable = false;
|
|
BSX.flash_bsr = false;
|
|
BSX.flash_csr = false;
|
|
BSX.flash_gsr = false;
|
|
BSX.flash_cmd_done = true;
|
|
break;
|
|
|
|
case 0x70:
|
|
//Read CSR
|
|
BSX.flash_enable = false;
|
|
BSX.flash_bsr = false;
|
|
BSX.flash_csr = true;
|
|
BSX.flash_gsr = false;
|
|
BSX.read_enable = false;
|
|
BSX.write_enable = false;
|
|
BSX.flash_cmd_done = true;
|
|
break;
|
|
|
|
case 0x71:
|
|
//Read Extended Status Registers (Page and Global)
|
|
BSX.flash_enable = false;
|
|
BSX.flash_bsr = true;
|
|
BSX.flash_csr = false;
|
|
BSX.flash_gsr = true;
|
|
BSX.read_enable = false;
|
|
BSX.write_enable = false;
|
|
BSX.flash_cmd_done = true;
|
|
break;
|
|
|
|
case 0x75:
|
|
//Show Page Buffer / Vendor Info
|
|
BSX.flash_csr = false;
|
|
BSX.read_enable = true;
|
|
BSX.flash_cmd_done = true;
|
|
break;
|
|
|
|
case 0xD0:
|
|
//DO COMMAND
|
|
switch (BSX.flash_command & 0xFFFF)
|
|
{
|
|
case 0x20D0: //Block Erase
|
|
uint32 x;
|
|
for (x = 0; x < 0x10000; x++) {
|
|
//BSX_Set_Bypass_FlashIO(((address & 0xFF0000) + x), 0xFF);
|
|
if (BSX.MMC[0x02])
|
|
FlashROM[(address & 0x0F0000) + x] = 0xFF;
|
|
else
|
|
FlashROM[((address & 0x1E0000) >> 1) + x] = 0xFF;
|
|
}
|
|
break;
|
|
|
|
case 0xA7D0: //Chip Erase (ONLY IN TYPE 1 AND 4)
|
|
if ((flashcard[6] & 0xF0) == 0x10 || (flashcard[6] & 0xF0) == 0x40)
|
|
{
|
|
uint32 x;
|
|
for (x = 0; x < FLASH_SIZE; x++) {
|
|
//BSX_Set_Bypass_FlashIO(x, 0xFF);
|
|
FlashROM[x] = 0xFF;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 0x38D0: //Flashcart Reset
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
void S9xBSXSetStream1 (uint8 count)
|
|
{
|
|
if (BSX.sat_stream1.is_open())
|
|
BSX.sat_stream1.close(); //If Stream already opened for one file: Close it.
|
|
|
|
char path[PATH_MAX + 1], name[PATH_MAX + 1];
|
|
|
|
strcpy(path, S9xGetDirectory(SAT_DIR));
|
|
strcat(path, SLASH_STR);
|
|
|
|
snprintf(name, PATH_MAX + 1, "BSX%04X-%d.bin", (BSX.PPU[0x2188 - BSXPPUBASE] | (BSX.PPU[0x2189 - BSXPPUBASE] * 256)), count); //BSXHHHH-DDD.bin
|
|
strcat(path, name);
|
|
|
|
BSX.sat_stream1.clear();
|
|
BSX.sat_stream1.open(path, std::ios::in | std::ios::binary);
|
|
if (BSX.sat_stream1.good())
|
|
{
|
|
BSX.sat_stream1.seekg(0, BSX.sat_stream1.end);
|
|
long str1size = BSX.sat_stream1.tellg();
|
|
BSX.sat_stream1.seekg(0, BSX.sat_stream1.beg);
|
|
float QueueSize = str1size / 22.;
|
|
BSX.sat_stream1_queue = (uint16)(ceil(QueueSize));
|
|
BSX.PPU[0x218D - BSXPPUBASE] = 0;
|
|
BSX.sat_stream1_first = TRUE;
|
|
BSX.sat_stream1_loaded = TRUE;
|
|
}
|
|
else
|
|
{
|
|
BSX.sat_stream1_loaded = FALSE;
|
|
}
|
|
}
|
|
|
|
void S9xBSXSetStream2 (uint8 count)
|
|
{
|
|
if (BSX.sat_stream2.is_open())
|
|
BSX.sat_stream2.close(); //If Stream already opened for one file: Close it.
|
|
|
|
char path[PATH_MAX + 1], name[PATH_MAX + 1];
|
|
|
|
strcpy(path, S9xGetDirectory(SAT_DIR));
|
|
strcat(path, SLASH_STR);
|
|
|
|
snprintf(name, PATH_MAX + 1, "BSX%04X-%d.bin", (BSX.PPU[0x218E - BSXPPUBASE] | (BSX.PPU[0x218F - BSXPPUBASE] * 256)), count); //BSXHHHH-DDD.bin
|
|
strcat(path, name);
|
|
|
|
BSX.sat_stream2.clear();
|
|
BSX.sat_stream2.open(path, std::ios::in | std::ios::binary);
|
|
if (BSX.sat_stream2.good())
|
|
{
|
|
BSX.sat_stream2.seekg(0, BSX.sat_stream2.end);
|
|
long str2size = BSX.sat_stream2.tellg();
|
|
BSX.sat_stream2.seekg(0, BSX.sat_stream2.beg);
|
|
float QueueSize = str2size / 22.;
|
|
BSX.sat_stream2_queue = (uint16)(ceil(QueueSize));
|
|
BSX.PPU[0x2193 - BSXPPUBASE] = 0;
|
|
BSX.sat_stream2_first = TRUE;
|
|
BSX.sat_stream2_loaded = TRUE;
|
|
}
|
|
else
|
|
{
|
|
BSX.sat_stream2_loaded = FALSE;
|
|
}
|
|
}
|
|
|
|
uint8 S9xBSXGetRTC (void)
|
|
{
|
|
//Get Time
|
|
time_t t;
|
|
struct tm *tmr;
|
|
|
|
time(&t);
|
|
tmr = localtime(&t);
|
|
|
|
BSX.test2192[0] = 0x00;
|
|
BSX.test2192[1] = 0x00;
|
|
BSX.test2192[2] = 0x00;
|
|
BSX.test2192[3] = 0x00;
|
|
BSX.test2192[4] = 0x10;
|
|
BSX.test2192[5] = 0x01;
|
|
BSX.test2192[6] = 0x01;
|
|
BSX.test2192[7] = 0x00;
|
|
BSX.test2192[8] = 0x00;
|
|
BSX.test2192[9] = 0x00;
|
|
BSX.test2192[10] = BSX_RTC.seconds = tmr->tm_sec;
|
|
BSX.test2192[11] = BSX_RTC.minutes = tmr->tm_min;
|
|
BSX.test2192[12] = BSX_RTC.hours = tmr->tm_hour;
|
|
BSX.test2192[13] = BSX_RTC.dayweek = (tmr->tm_wday) + 1;
|
|
BSX.test2192[14] = BSX_RTC.day = tmr->tm_mday;
|
|
BSX.test2192[15] = BSX_RTC.month = (tmr->tm_mon) + 1;
|
|
BSX_RTC.year = tmr->tm_year + 1900;
|
|
BSX.test2192[16] = (BSX_RTC.year) & 0xFF;
|
|
BSX.test2192[17] = (BSX_RTC.year) >> 8;
|
|
|
|
t = BSX.test2192[BSX.out_index++];
|
|
|
|
if (BSX.out_index > 22)
|
|
BSX.out_index = 0;
|
|
|
|
return t;
|
|
}
|
|
|
|
uint8 S9xGetBSXPPU (uint16 address)
|
|
{
|
|
uint8 t;
|
|
|
|
// known read registers
|
|
switch (address)
|
|
{
|
|
//Stream 1
|
|
// Logical Channel 1 + Data Structure (R/W)
|
|
case 0x2188:
|
|
t = BSX.PPU[0x2188 - BSXPPUBASE];
|
|
break;
|
|
|
|
// Logical Channel 2 (R/W) [6bit]
|
|
case 0x2189:
|
|
t = BSX.PPU[0x2189 - BSXPPUBASE];
|
|
break;
|
|
|
|
// Prefix Count (R)
|
|
case 0x218A:
|
|
if (!BSX.sat_pf_latch1_enable || !BSX.sat_dt_latch1_enable)
|
|
{
|
|
t = 0;
|
|
break;
|
|
}
|
|
|
|
if (BSX.PPU[0x2188 - BSXPPUBASE] == 0 && BSX.PPU[0x2189 - BSXPPUBASE] == 0)
|
|
{
|
|
t = 1;
|
|
break;
|
|
}
|
|
|
|
#ifndef GEKKO
|
|
if (BSX.sat_stream1_queue <= 0)
|
|
{
|
|
BSX.sat_stream1_count++;
|
|
S9xBSXSetStream1(BSX.sat_stream1_count - 1);
|
|
}
|
|
|
|
if (!BSX.sat_stream1_loaded && (BSX.sat_stream1_count - 1) > 0)
|
|
{
|
|
BSX.sat_stream1_count = 1;
|
|
S9xBSXSetStream1(BSX.sat_stream1_count - 1);
|
|
}
|
|
#endif
|
|
if (BSX.sat_stream1_loaded)
|
|
{
|
|
//Lock at 0x7F for bigger packets
|
|
if (BSX.sat_stream1_queue >= 128)
|
|
BSX.PPU[0x218A - BSXPPUBASE] = 0x7F;
|
|
else
|
|
BSX.PPU[0x218A - BSXPPUBASE] = BSX.sat_stream1_queue;
|
|
t = BSX.PPU[0x218A - BSXPPUBASE];
|
|
}
|
|
else
|
|
t = 0;
|
|
break;
|
|
|
|
// Prefix Latch (R/W)
|
|
case 0x218B:
|
|
if (BSX.sat_pf_latch1_enable)
|
|
{
|
|
if (BSX.PPU[0x2188 - BSXPPUBASE] == 0 && BSX.PPU[0x2189 - BSXPPUBASE] == 0)
|
|
{
|
|
BSX.PPU[0x218B - BSXPPUBASE] = 0x90;
|
|
}
|
|
|
|
if (BSX.sat_stream1_loaded)
|
|
{
|
|
uint8 temp = 0;
|
|
if (BSX.sat_stream1_first)
|
|
{
|
|
// First packet
|
|
temp |= 0x10;
|
|
BSX.sat_stream1_first = FALSE;
|
|
}
|
|
|
|
BSX.sat_stream1_queue--;
|
|
|
|
if (BSX.sat_stream1_queue == 0)
|
|
{
|
|
//Last packet
|
|
temp |= 0x80;
|
|
}
|
|
|
|
BSX.PPU[0x218B - BSXPPUBASE] = temp;
|
|
}
|
|
|
|
BSX.PPU[0x218D - BSXPPUBASE] |= BSX.PPU[0x218B - BSXPPUBASE];
|
|
t = BSX.PPU[0x218B - BSXPPUBASE];
|
|
}
|
|
else
|
|
{
|
|
t = 0;
|
|
}
|
|
break;
|
|
|
|
// Data Latch (R/W)
|
|
case 0x218C:
|
|
if (BSX.sat_dt_latch1_enable)
|
|
{
|
|
if (BSX.PPU[0x2188 - BSXPPUBASE] == 0 && BSX.PPU[0x2189 - BSXPPUBASE] == 0)
|
|
{
|
|
BSX.PPU[0x218C - BSXPPUBASE] = S9xBSXGetRTC();
|
|
}
|
|
else if (BSX.sat_stream1_loaded)
|
|
{
|
|
if (BSX.sat_stream1.eof())
|
|
BSX.PPU[0x218C - BSXPPUBASE] = 0xFF;
|
|
else
|
|
BSX.PPU[0x218C - BSXPPUBASE] = BSX.sat_stream1.get();
|
|
}
|
|
t = BSX.PPU[0x218C - BSXPPUBASE];
|
|
}
|
|
else
|
|
{
|
|
t = 0;
|
|
}
|
|
break;
|
|
|
|
// OR gate (R)
|
|
case 0x218D:
|
|
t = BSX.PPU[0x218D - BSXPPUBASE];
|
|
BSX.PPU[0x218D - BSXPPUBASE] = 0;
|
|
break;
|
|
|
|
//Stream 2
|
|
// Logical Channel 1 + Data Structure (R/W)
|
|
case 0x218E:
|
|
t = BSX.PPU[0x218E - BSXPPUBASE];
|
|
break;
|
|
|
|
// Logical Channel 2 (R/W) [6bit]
|
|
case 0x218F:
|
|
t = BSX.PPU[0x218F - BSXPPUBASE];
|
|
break;
|
|
|
|
// Prefix Count (R)
|
|
case 0x2190:
|
|
if (!BSX.sat_pf_latch2_enable || !BSX.sat_dt_latch2_enable)
|
|
{
|
|
t = 0;
|
|
break;
|
|
}
|
|
|
|
if (BSX.PPU[0x218E - BSXPPUBASE] == 0 && BSX.PPU[0x218F - BSXPPUBASE] == 0)
|
|
{
|
|
t = 1;
|
|
break;
|
|
}
|
|
|
|
#ifndef GEKKO
|
|
if (BSX.sat_stream2_queue <= 0)
|
|
{
|
|
BSX.sat_stream2_count++;
|
|
S9xBSXSetStream2(BSX.sat_stream2_count - 1);
|
|
}
|
|
|
|
if (!BSX.sat_stream2_loaded && (BSX.sat_stream2_count - 1) > 0)
|
|
{
|
|
BSX.sat_stream2_count = 1;
|
|
S9xBSXSetStream2(BSX.sat_stream2_count - 1);
|
|
}
|
|
#endif
|
|
if (BSX.sat_stream2_loaded)
|
|
{
|
|
if (BSX.sat_stream2_queue >= 128)
|
|
BSX.PPU[0x2190 - BSXPPUBASE] = 0x7F;
|
|
else
|
|
BSX.PPU[0x2190 - BSXPPUBASE] = BSX.sat_stream2_queue;
|
|
t = BSX.PPU[0x2190 - BSXPPUBASE];
|
|
}
|
|
else
|
|
t = 0;
|
|
break;
|
|
|
|
// Prefix Latch (R/W)
|
|
case 0x2191:
|
|
if (BSX.sat_pf_latch2_enable)
|
|
{
|
|
if (BSX.PPU[0x218E - BSXPPUBASE] == 0 && BSX.PPU[0x218F - BSXPPUBASE] == 0)
|
|
{
|
|
BSX.PPU[0x2191 - BSXPPUBASE] = 0x90;
|
|
}
|
|
|
|
if (BSX.sat_stream2_loaded)
|
|
{
|
|
uint8 temp = 0;
|
|
if (BSX.sat_stream2_first)
|
|
{
|
|
// First packet
|
|
temp |= 0x10;
|
|
BSX.sat_stream2_first = FALSE;
|
|
}
|
|
|
|
BSX.sat_stream2_queue--;
|
|
|
|
if (BSX.sat_stream2_queue == 0)
|
|
{
|
|
//Last packet
|
|
temp |= 0x80;
|
|
}
|
|
|
|
BSX.PPU[0x2191 - BSXPPUBASE] = temp;
|
|
}
|
|
|
|
BSX.PPU[0x2193 - BSXPPUBASE] |= BSX.PPU[0x2191 - BSXPPUBASE];
|
|
t = BSX.PPU[0x2191 - BSXPPUBASE];
|
|
}
|
|
else
|
|
{
|
|
t = 0;
|
|
}
|
|
break;
|
|
|
|
// Data Latch (R/W)
|
|
case 0x2192:
|
|
if (BSX.sat_dt_latch2_enable)
|
|
{
|
|
if (BSX.PPU[0x218E - BSXPPUBASE] == 0 && BSX.PPU[0x218F - BSXPPUBASE] == 0)
|
|
{
|
|
BSX.PPU[0x2192 - BSXPPUBASE] = S9xBSXGetRTC();
|
|
}
|
|
else if (BSX.sat_stream2_loaded)
|
|
{
|
|
if (BSX.sat_stream2.eof())
|
|
BSX.PPU[0x2192 - BSXPPUBASE] = 0xFF;
|
|
else
|
|
BSX.PPU[0x2192 - BSXPPUBASE] = BSX.sat_stream2.get();
|
|
}
|
|
t = BSX.PPU[0x2192 - BSXPPUBASE];
|
|
}
|
|
else
|
|
{
|
|
t = 0;
|
|
}
|
|
break;
|
|
|
|
// OR gate (R)
|
|
case 0x2193:
|
|
t = BSX.PPU[0x2193 - BSXPPUBASE];
|
|
BSX.PPU[0x2193 - BSXPPUBASE] = 0;
|
|
break;
|
|
|
|
//Other
|
|
// Satellaview LED / Stream Enable (R/W) [4bit]
|
|
case 0x2194:
|
|
t = BSX.PPU[0x2194 - BSXPPUBASE];
|
|
break;
|
|
|
|
// Unknown
|
|
case 0x2195:
|
|
t = BSX.PPU[0x2195 - BSXPPUBASE];
|
|
break;
|
|
|
|
// Satellaview Status (R)
|
|
case 0x2196:
|
|
t = BSX.PPU[0x2196 - BSXPPUBASE];
|
|
break;
|
|
|
|
// Soundlink Settings (R/W)
|
|
case 0x2197:
|
|
t = BSX.PPU[0x2197 - BSXPPUBASE];
|
|
break;
|
|
|
|
// Serial I/O - Serial Number (R/W)
|
|
case 0x2198:
|
|
t = BSX.PPU[0x2198 - BSXPPUBASE];
|
|
break;
|
|
|
|
// Serial I/O - Unknown (R/W)
|
|
case 0x2199:
|
|
t = BSX.PPU[0x2199 - BSXPPUBASE];
|
|
break;
|
|
|
|
default:
|
|
t = OpenBus;
|
|
break;
|
|
}
|
|
|
|
return (t);
|
|
}
|
|
|
|
void S9xSetBSXPPU (uint8 byte, uint16 address)
|
|
{
|
|
// known write registers
|
|
switch (address)
|
|
{
|
|
//Stream 1
|
|
// Logical Channel 1 + Data Structure (R/W)
|
|
case 0x2188:
|
|
if (BSX.PPU[0x2188 - BSXPPUBASE] == byte)
|
|
{
|
|
BSX.sat_stream1_count = 0;
|
|
}
|
|
BSX.PPU[0x2188 - BSXPPUBASE] = byte;
|
|
break;
|
|
|
|
// Logical Channel 2 (R/W) [6bit]
|
|
case 0x2189:
|
|
if (BSX.PPU[0x2188 - BSXPPUBASE] == (byte & 0x3F))
|
|
{
|
|
BSX.sat_stream1_count = 0;
|
|
}
|
|
BSX.PPU[0x2189 - BSXPPUBASE] = byte & 0x3F;
|
|
break;
|
|
|
|
// Prefix Latch (R/W)
|
|
case 0x218B:
|
|
BSX.sat_pf_latch1_enable = (byte != 0);
|
|
break;
|
|
|
|
// Data Latch (R/W)
|
|
case 0x218C:
|
|
if (BSX.PPU[0x2188 - BSXPPUBASE] == 0 && BSX.PPU[0x2189 - BSXPPUBASE] == 0)
|
|
{
|
|
BSX.out_index = 0;
|
|
}
|
|
BSX.sat_dt_latch1_enable = (byte != 0);
|
|
break;
|
|
|
|
//Stream 2
|
|
// Logical Channel 1 + Data Structure (R/W)
|
|
case 0x218E:
|
|
if (BSX.PPU[0x218E - BSXPPUBASE] == byte)
|
|
{
|
|
BSX.sat_stream2_count = 0;
|
|
}
|
|
BSX.PPU[0x218E - BSXPPUBASE] = byte;
|
|
break;
|
|
|
|
// Logical Channel 2 (R/W) [6bit]
|
|
case 0x218F:
|
|
if (BSX.PPU[0x218F - BSXPPUBASE] == (byte & 0x3F))
|
|
{
|
|
BSX.sat_stream2_count = 0;
|
|
}
|
|
BSX.PPU[0x218F - BSXPPUBASE] = byte & 0x3F;
|
|
break;
|
|
|
|
// Prefix Latch (R/W)
|
|
case 0x2191:
|
|
BSX.sat_pf_latch2_enable = (byte != 0);
|
|
break;
|
|
|
|
// Data Latch (R/W)
|
|
case 0x2192:
|
|
if (BSX.PPU[0x218E - BSXPPUBASE] == 0 && BSX.PPU[0x218F - BSXPPUBASE] == 0)
|
|
{
|
|
BSX.out_index = 0;
|
|
}
|
|
BSX.sat_dt_latch2_enable = (byte != 0);
|
|
break;
|
|
|
|
//Other
|
|
// Satellaview LED / Stream Enable (R/W) [4bit]
|
|
case 0x2194:
|
|
BSX.PPU[0x2194 - BSXPPUBASE] = byte & 0x0F;
|
|
break;
|
|
|
|
// Soundlink Settings (R/W)
|
|
case 0x2197:
|
|
BSX.PPU[0x2197 - BSXPPUBASE] = byte;
|
|
break;
|
|
}
|
|
}
|
|
|
|
uint8 * S9xGetBasePointerBSX (uint32 address)
|
|
{
|
|
return (MapROM);
|
|
}
|
|
|
|
static bool8 BSX_LoadBIOS (void)
|
|
{
|
|
#ifdef GEKKO
|
|
return TRUE; // We're not loading the BIOS!
|
|
#else
|
|
FILE *fp;
|
|
char path[PATH_MAX + 1], name[PATH_MAX + 1];
|
|
bool8 r = FALSE;
|
|
|
|
strcpy(path, S9xGetDirectory(BIOS_DIR));
|
|
strcat(path, SLASH_STR);
|
|
strcpy(name, path);
|
|
strcat(name, "BS-X.bin");
|
|
|
|
fp = fopen(name, "rb");
|
|
if (!fp)
|
|
{
|
|
strcpy(name, path);
|
|
strcat(name, "BS-X.bios");
|
|
fp = fopen(name, "rb");
|
|
}
|
|
|
|
if (fp)
|
|
{
|
|
size_t size;
|
|
|
|
size = fread((void *) BIOSROM, 1, BIOS_SIZE, fp);
|
|
fclose(fp);
|
|
if (size == BIOS_SIZE)
|
|
r = TRUE;
|
|
}
|
|
|
|
#ifdef BSX_DEBUG
|
|
if (r)
|
|
printf("BS: BIOS found.\n");
|
|
else
|
|
printf("BS: BIOS not found!\n");
|
|
#endif
|
|
|
|
return (r);
|
|
#endif
|
|
}
|
|
|
|
static bool8 is_BSX_BIOS (const uint8 *data, uint32 size)
|
|
{
|
|
if (size == BIOS_SIZE && strncmp((char *) (data + 0x7FC0), "Satellaview BS-X ", 21) == 0)
|
|
return (TRUE);
|
|
else
|
|
return (FALSE);
|
|
}
|
|
#ifdef GEKKO
|
|
bool isBSX() {
|
|
if(is_bsx(Memory.ROM + 0x7FC0) == 1 || is_bsx(Memory.ROM + 0xFFC0) == 1) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
#endif
|
|
void S9xInitBSX (void)
|
|
{
|
|
Settings.BS = FALSE;
|
|
|
|
if (is_BSX_BIOS(Memory.ROM,Memory.CalculatedSize))
|
|
{
|
|
// BS-X itself
|
|
|
|
Settings.BS = TRUE;
|
|
Settings.BSXItself = TRUE;
|
|
|
|
Memory.LoROM = TRUE;
|
|
Memory.HiROM = FALSE;
|
|
|
|
memmove(BIOSROM, Memory.ROM, BIOS_SIZE);
|
|
|
|
FlashMode = FALSE;
|
|
FlashSize = FLASH_SIZE;
|
|
|
|
BSX.bootup = TRUE;
|
|
}
|
|
else
|
|
{
|
|
Settings.BSXItself = FALSE;
|
|
|
|
int r1, r2;
|
|
|
|
r1 = (is_bsx(Memory.ROM + 0x7FC0) == 1);
|
|
r2 = (is_bsx(Memory.ROM + 0xFFC0) == 1);
|
|
Settings.BS = (r1 | r2) ? TRUE : FALSE;
|
|
|
|
if (Settings.BS)
|
|
{
|
|
// BS games
|
|
|
|
Memory.LoROM = r1 ? TRUE : FALSE;
|
|
Memory.HiROM = r2 ? TRUE : FALSE;
|
|
|
|
uint8 *header = r1 ? Memory.ROM + 0x7FC0 : Memory.ROM + 0xFFC0;
|
|
|
|
FlashMode = (header[0x18] & 0xEF) == 0x20 ? FALSE : TRUE;
|
|
FlashSize = (header[0x19] & 0x20) ? PSRAM_SIZE : FLASH_SIZE;
|
|
|
|
// Fix Block Allocation Flags
|
|
// (for games that don't have it setup properly,
|
|
// for exemple when taken seperately from the upper memory of the Memory Pack,
|
|
// else the game will error out on BS-X)
|
|
for (; (((header[0x10] & 1) == 0) && header[0x10] != 0); (header[0x10] >>= 1));
|
|
|
|
#ifdef BSX_DEBUG
|
|
for (int i = 0; i <= 0x1F; i++)
|
|
printf("BS: ROM Header %02X: %02X\n", i, header[i]);
|
|
printf("BS: FlashMode: %d, FlashSize: %x\n", FlashMode, FlashSize);
|
|
#endif
|
|
|
|
BSX.bootup = Settings.BSXBootup;
|
|
|
|
if (!BSX_LoadBIOS() && !is_BSX_BIOS(BIOSROM,BIOS_SIZE))
|
|
{
|
|
BSX.bootup = FALSE;
|
|
memset(BIOSROM, 0, BIOS_SIZE);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Settings.BS)
|
|
{
|
|
MapROM = NULL;
|
|
FlashROM = Memory.ROM;
|
|
/*
|
|
time_t t;
|
|
struct tm *tmr;
|
|
|
|
time(&t);
|
|
tmr = localtime(&t);
|
|
|
|
BSX_RTC.ticks = 0;
|
|
memcpy(BSX.test2192, init2192, sizeof(init2192));
|
|
BSX.test2192[10] = BSX_RTC.seconds = tmr->tm_sec;
|
|
BSX.test2192[11] = BSX_RTC.minutes = tmr->tm_min;
|
|
BSX.test2192[12] = BSX_RTC.hours = tmr->tm_hour;
|
|
#ifdef BSX_DEBUG
|
|
printf("BS: Current Time: %02d:%02d:%02d\n", BSX_RTC.hours, BSX_RTC.minutes, BSX_RTC.seconds);
|
|
#endif
|
|
*/
|
|
SNESGameFixes.SRAMInitialValue = 0x00;
|
|
}
|
|
}
|
|
|
|
void S9xResetBSX (void)
|
|
{
|
|
if (Settings.BSXItself)
|
|
memset(Memory.ROM, 0, FLASH_SIZE);
|
|
|
|
memset(BSX.PPU, 0, sizeof(BSX.PPU));
|
|
memset(BSX.MMC, 0, sizeof(BSX.MMC));
|
|
memset(BSX.prevMMC, 0, sizeof(BSX.prevMMC));
|
|
|
|
BSX.dirty = FALSE;
|
|
BSX.dirty2 = FALSE;
|
|
BSX.flash_enable = FALSE;
|
|
BSX.write_enable = FALSE;
|
|
BSX.read_enable = FALSE;
|
|
BSX.flash_command = 0;
|
|
BSX.old_write = 0;
|
|
BSX.new_write = 0;
|
|
|
|
BSX.out_index = 0;
|
|
memset(BSX.output, 0, sizeof(BSX.output));
|
|
|
|
if(bsxBiosLoadFailed) {
|
|
BSX.MMC[0x02] = FlashMode ? 0x80: 0;
|
|
|
|
// per bios: run from psram or flash card
|
|
if (FlashSize == PSRAM_SIZE)
|
|
{
|
|
memcpy(PSRAM, FlashROM, PSRAM_SIZE);
|
|
|
|
BSX.MMC[0x01] = 0x80;
|
|
BSX.MMC[0x03] = 0x80;
|
|
BSX.MMC[0x04] = 0x80;
|
|
BSX.MMC[0x0C] = 0x80;
|
|
BSX.MMC[0x0D] = 0x80;
|
|
}
|
|
else
|
|
{
|
|
BSX.MMC[0x03] = 0x80;
|
|
BSX.MMC[0x05] = 0x80;
|
|
BSX.MMC[0x06] = 0x80;
|
|
BSX.MMC[0x09] = BSX.MMC[0x0B] = 0x80;
|
|
}
|
|
|
|
BSX.MMC[0x0E] = 0x80;
|
|
}
|
|
else {
|
|
// starting from the bios
|
|
BSX.MMC[0x02] = BSX.MMC[0x03] = BSX.MMC[0x05] = BSX.MMC[0x06] = 0x80;
|
|
BSX.MMC[0x09] = BSX.MMC[0x0B] = 0x80;
|
|
|
|
BSX.MMC[0x07] = BSX.MMC[0x08] = 0x80;
|
|
BSX.MMC[0x0E] = 0x80;
|
|
}
|
|
|
|
// default register values
|
|
BSX.PPU[0x2196 - BSXPPUBASE] = 0x10;
|
|
BSX.PPU[0x2197 - BSXPPUBASE] = 0x80;
|
|
|
|
// stream reset
|
|
BSX.sat_pf_latch1_enable = BSX.sat_dt_latch1_enable = FALSE;
|
|
BSX.sat_pf_latch2_enable = BSX.sat_dt_latch2_enable = FALSE;
|
|
|
|
BSX.sat_stream1_loaded = BSX.sat_stream2_loaded = FALSE;
|
|
BSX.sat_stream1_first = BSX.sat_stream2_first = FALSE;
|
|
BSX.sat_stream1_count = BSX.sat_stream2_count = 0;
|
|
|
|
if (BSX.sat_stream1.is_open())
|
|
BSX.sat_stream1.close();
|
|
|
|
if (BSX.sat_stream2.is_open())
|
|
BSX.sat_stream2.close();
|
|
|
|
if (Settings.BS)
|
|
BSX_Map();
|
|
}
|
|
|
|
void S9xBSXPostLoadState (void)
|
|
{
|
|
uint8 temp[16];
|
|
bool8 pd1, pd2;
|
|
|
|
pd1 = BSX.dirty;
|
|
pd2 = BSX.dirty2;
|
|
memcpy(temp, BSX.MMC, sizeof(BSX.MMC));
|
|
|
|
memcpy(BSX.MMC, BSX.prevMMC, sizeof(BSX.MMC));
|
|
BSX_Map();
|
|
|
|
memcpy(BSX.MMC, temp, sizeof(BSX.MMC));
|
|
BSX.dirty = pd1;
|
|
BSX.dirty2 = pd2;
|
|
}
|
|
|
|
static bool valid_normal_bank (unsigned char bankbyte)
|
|
{
|
|
switch (bankbyte)
|
|
{
|
|
case 32: case 33: case 48: case 49:
|
|
return (true);
|
|
break;
|
|
}
|
|
|
|
return (false);
|
|
}
|
|
|
|
static int is_bsx (unsigned char *p)
|
|
{
|
|
if ((p[26] == 0x33 || p[26] == 0xFF) && (!p[21] || (p[21] & 131) == 128) && valid_normal_bank(p[24]))
|
|
{
|
|
unsigned char m = p[22];
|
|
|
|
if (!m && !p[23])
|
|
return (2);
|
|
|
|
if ((m == 0xFF && p[23] == 0xFF) || (!(m & 0xF) && ((m >> 4) - 1 < 12)))
|
|
return (1);
|
|
}
|
|
|
|
return (0);
|
|
}
|