}
}
}
-
+
void GBMemory::write(u16 addr, u8 value, WatchpointControl watch)
{
if (watch == WATCH)
core->update_JOYP();
}
else if (addr > 0xFF00) {
- high[addr-0xFF00] = value;
- if (addr == DIV)
+ int port_number = addr - 0xFF00;
+ // Check if port is writable
+ if (port_access[port_number] != READ_ONLY)
{
- high[I_DIV] = 0;
+ // Do the write
+ high[port_number] = value;
+ if (addr == DIV)
+ {
+ high[I_DIV] = 0;
+ }
+ else if (addr == DMA)
+ {
+ u16 dma_src = value << 8;
+ //logger.warning("OAM DMA transfer from 0x", std::hex, std::setfill('0'), dma_src, " requested");
+ core->video.DMA_OAM(dma_src);
+ }
}
- else if (addr == DMA)
+ else
{
- u16 dma_src = value << 8;
- //logger.warning("OAM DMA transfer from 0x", std::hex, std::setfill('0'), dma_src, " requested");
- core->video.DMA_OAM(dma_src);
+ logger.warning("WTF? Trying to write to addr=0x",std::hex, addr, " (read-only port). PC=0x",std::hex,core->regs.PC);
}
+
}
else {
std::ostringstream errmsg;
else if (addr < 0xE000) return WRAM[addr - WRAM_BASE];
else if (addr < 0xFDFF) return read(addr-0x2000);
else if (addr < 0xFEA0) return core->video.read_OAM (addr);
- else if (addr >= 0xFF00) return high[addr-0xFF00];
+ else if (addr >= 0xFF00)
+ {
+ int port_number=addr-0xFF00;
+ // Check access
+ if (port_access[port_number] == WRITE_ONLY)
+ {
+ logger.warning("WTF? Trying to read from addr=0x",std::hex, addr, " (write-only port). PC=0x",std::hex,core->regs.PC);
+ }
+ return high[port_number];
+ }
else {
std::ostringstream errmsg;
errmsg << "Invalid read address 0x" <<
}
}
+const GBMemory::PortAccess GBMemory::port_access[256]=
+{
+ READWRITE, // 0xFF00
+ READWRITE, // 0xFF01
+ READWRITE, // 0xFF02
+ READWRITE, // 0xFF03
+ READWRITE, // 0xFF04
+ READWRITE, // 0xFF05
+ READWRITE, // 0xFF06
+ READWRITE, // 0xFF07
+ READWRITE, // 0xFF08
+ READWRITE, // 0xFF09
+ READWRITE, // 0xFF0A
+ READWRITE, // 0xFF0B
+ READWRITE, // 0xFF0C
+ READWRITE, // 0xFF0D
+ READWRITE, // 0xFF0E
+ READWRITE, // 0xFF0F
+ READWRITE, // 0xFF10
+ READWRITE, // 0xFF11
+ READWRITE, // 0xFF12
+ READWRITE, // 0xFF13
+ READWRITE, // 0xFF14
+ READWRITE, // 0xFF15
+ READWRITE, // 0xFF16
+ READWRITE, // 0xFF17
+ READWRITE, // 0xFF18
+ READWRITE, // 0xFF19
+ READWRITE, // 0xFF1A
+ READWRITE, // 0xFF1B
+ READWRITE, // 0xFF1C
+ READWRITE, // 0xFF1D
+ READWRITE, // 0xFF1E
+ READWRITE, // 0xFF1F
+ READWRITE, // 0xFF20
+ READWRITE, // 0xFF21
+ READWRITE, // 0xFF22
+ READWRITE, // 0xFF23
+ READWRITE, // 0xFF24
+ READWRITE, // 0xFF25
+ READWRITE, // 0xFF26
+ READWRITE, // 0xFF27
+ READWRITE, // 0xFF28
+ READWRITE, // 0xFF29
+ READWRITE, // 0xFF2A
+ READWRITE, // 0xFF2B
+ READWRITE, // 0xFF2C
+ READWRITE, // 0xFF2D
+ READWRITE, // 0xFF2E
+ READWRITE, // 0xFF2F
+ READWRITE, // 0xFF30
+ READWRITE, // 0xFF31
+ READWRITE, // 0xFF32
+ READWRITE, // 0xFF33
+ READWRITE, // 0xFF34
+ READWRITE, // 0xFF35
+ READWRITE, // 0xFF36
+ READWRITE, // 0xFF37
+ READWRITE, // 0xFF38
+ READWRITE, // 0xFF39
+ READWRITE, // 0xFF3A
+ READWRITE, // 0xFF3B
+ READWRITE, // 0xFF3C
+ READWRITE, // 0xFF3D
+ READWRITE, // 0xFF3E
+ READWRITE, // 0xFF3F
+ READWRITE, // 0xFF40
+ READWRITE, // 0xFF41
+ READWRITE, // 0xFF42
+ READWRITE, // 0xFF43
+ READ_ONLY, // 0xFF44
+ READWRITE, // 0xFF45
+ WRITE_ONLY, // 0xFF46
+ READWRITE, // 0xFF47
+ READWRITE, // 0xFF48
+ READWRITE, // 0xFF49
+ READWRITE, // 0xFF4A
+ READWRITE, // 0xFF4B
+ READWRITE, // 0xFF4C
+ READWRITE, // 0xFF4D
+ READWRITE, // 0xFF4E
+ READWRITE, // 0xFF4F
+ READWRITE, // 0xFF50
+ READWRITE, // 0xFF51
+ READWRITE, // 0xFF52
+ READWRITE, // 0xFF53
+ READWRITE, // 0xFF54
+ READWRITE, // 0xFF55
+ READWRITE, // 0xFF56
+ READWRITE, // 0xFF57
+ READWRITE, // 0xFF58
+ READWRITE, // 0xFF59
+ READWRITE, // 0xFF5A
+ READWRITE, // 0xFF5B
+ READWRITE, // 0xFF5C
+ READWRITE, // 0xFF5D
+ READWRITE, // 0xFF5E
+ READWRITE, // 0xFF5F
+ READWRITE, // 0xFF60
+ READWRITE, // 0xFF61
+ READWRITE, // 0xFF62
+ READWRITE, // 0xFF63
+ READWRITE, // 0xFF64
+ READWRITE, // 0xFF65
+ READWRITE, // 0xFF66
+ READWRITE, // 0xFF67
+ READWRITE, // 0xFF68
+ READWRITE, // 0xFF69
+ READWRITE, // 0xFF6A
+ READWRITE, // 0xFF6B
+ READWRITE, // 0xFF6C
+ READWRITE, // 0xFF6D
+ READWRITE, // 0xFF6E
+ READWRITE, // 0xFF6F
+ READWRITE, // 0xFF70
+ READWRITE, // 0xFF71
+ READWRITE, // 0xFF72
+ READWRITE, // 0xFF73
+ READWRITE, // 0xFF74
+ READWRITE, // 0xFF75
+ READWRITE, // 0xFF76
+ READWRITE, // 0xFF77
+ READWRITE, // 0xFF78
+ READWRITE, // 0xFF79
+ READWRITE, // 0xFF7A
+ READWRITE, // 0xFF7B
+ READWRITE, // 0xFF7C
+ READWRITE, // 0xFF7D
+ READWRITE, // 0xFF7E
+ READWRITE, // 0xFF7F
+ READWRITE, // 0xFF80
+ READWRITE, // 0xFF81
+ READWRITE, // 0xFF82
+ READWRITE, // 0xFF83
+ READWRITE, // 0xFF84
+ READWRITE, // 0xFF85
+ READWRITE, // 0xFF86
+ READWRITE, // 0xFF87
+ READWRITE, // 0xFF88
+ READWRITE, // 0xFF89
+ READWRITE, // 0xFF8A
+ READWRITE, // 0xFF8B
+ READWRITE, // 0xFF8C
+ READWRITE, // 0xFF8D
+ READWRITE, // 0xFF8E
+ READWRITE, // 0xFF8F
+ READWRITE, // 0xFF90
+ READWRITE, // 0xFF91
+ READWRITE, // 0xFF92
+ READWRITE, // 0xFF93
+ READWRITE, // 0xFF94
+ READWRITE, // 0xFF95
+ READWRITE, // 0xFF96
+ READWRITE, // 0xFF97
+ READWRITE, // 0xFF98
+ READWRITE, // 0xFF99
+ READWRITE, // 0xFF9A
+ READWRITE, // 0xFF9B
+ READWRITE, // 0xFF9C
+ READWRITE, // 0xFF9D
+ READWRITE, // 0xFF9E
+ READWRITE, // 0xFF9F
+ READWRITE, // 0xFFA0
+ READWRITE, // 0xFFA1
+ READWRITE, // 0xFFA2
+ READWRITE, // 0xFFA3
+ READWRITE, // 0xFFA4
+ READWRITE, // 0xFFA5
+ READWRITE, // 0xFFA6
+ READWRITE, // 0xFFA7
+ READWRITE, // 0xFFA8
+ READWRITE, // 0xFFA9
+ READWRITE, // 0xFFAA
+ READWRITE, // 0xFFAB
+ READWRITE, // 0xFFAC
+ READWRITE, // 0xFFAD
+ READWRITE, // 0xFFAE
+ READWRITE, // 0xFFAF
+ READWRITE, // 0xFFB0
+ READWRITE, // 0xFFB1
+ READWRITE, // 0xFFB2
+ READWRITE, // 0xFFB3
+ READWRITE, // 0xFFB4
+ READWRITE, // 0xFFB5
+ READWRITE, // 0xFFB6
+ READWRITE, // 0xFFB7
+ READWRITE, // 0xFFB8
+ READWRITE, // 0xFFB9
+ READWRITE, // 0xFFBA
+ READWRITE, // 0xFFBB
+ READWRITE, // 0xFFBC
+ READWRITE, // 0xFFBD
+ READWRITE, // 0xFFBE
+ READWRITE, // 0xFFBF
+ READWRITE, // 0xFFC0
+ READWRITE, // 0xFFC1
+ READWRITE, // 0xFFC2
+ READWRITE, // 0xFFC3
+ READWRITE, // 0xFFC4
+ READWRITE, // 0xFFC5
+ READWRITE, // 0xFFC6
+ READWRITE, // 0xFFC7
+ READWRITE, // 0xFFC8
+ READWRITE, // 0xFFC9
+ READWRITE, // 0xFFCA
+ READWRITE, // 0xFFCB
+ READWRITE, // 0xFFCC
+ READWRITE, // 0xFFCD
+ READWRITE, // 0xFFCE
+ READWRITE, // 0xFFCF
+ READWRITE, // 0xFFD0
+ READWRITE, // 0xFFD1
+ READWRITE, // 0xFFD2
+ READWRITE, // 0xFFD3
+ READWRITE, // 0xFFD4
+ READWRITE, // 0xFFD5
+ READWRITE, // 0xFFD6
+ READWRITE, // 0xFFD7
+ READWRITE, // 0xFFD8
+ READWRITE, // 0xFFD9
+ READWRITE, // 0xFFDA
+ READWRITE, // 0xFFDB
+ READWRITE, // 0xFFDC
+ READWRITE, // 0xFFDD
+ READWRITE, // 0xFFDE
+ READWRITE, // 0xFFDF
+ READWRITE, // 0xFFE0
+ READWRITE, // 0xFFE1
+ READWRITE, // 0xFFE2
+ READWRITE, // 0xFFE3
+ READWRITE, // 0xFFE4
+ READWRITE, // 0xFFE5
+ READWRITE, // 0xFFE6
+ READWRITE, // 0xFFE7
+ READWRITE, // 0xFFE8
+ READWRITE, // 0xFFE9
+ READWRITE, // 0xFFEA
+ READWRITE, // 0xFFEB
+ READWRITE, // 0xFFEC
+ READWRITE, // 0xFFED
+ READWRITE, // 0xFFEE
+ READWRITE, // 0xFFEF
+ READWRITE, // 0xFFF0
+ READWRITE, // 0xFFF1
+ READWRITE, // 0xFFF2
+ READWRITE, // 0xFFF3
+ READWRITE, // 0xFFF4
+ READWRITE, // 0xFFF5
+ READWRITE, // 0xFFF6
+ READWRITE, // 0xFFF7
+ READWRITE, // 0xFFF8
+ READWRITE, // 0xFFF9
+ READWRITE, // 0xFFFA
+ READWRITE, // 0xFFFB
+ READWRITE, // 0xFFFC
+ READWRITE, // 0xFFFD
+ READWRITE, // 0xFFFE
+ READWRITE, // 0xFFFF
+};
+
u8 read (u16 addr, WatchpointControl watch = WATCH);
u16 read16(u16 addr, WatchpointControl watch = WATCH);
void write (u16 addr, u8 value, WatchpointControl watch = WATCH);
-
+
+ enum PortAccess
+ {
+ READ_ONLY = 1,
+ WRITE_ONLY = 2,
+ READWRITE = 3,
+ };
+
+
public:
static const u16 JOYP = 0xFF00; // Joypad (R/W)
static const u16 DIV = 0xFF04; // Divider register (R/W)
static const u16 I_DMA = 0xFF46 - IO_BASE; // DMA Transfer & Start addr (W)
static const u16 I_IF = 0xFF0F - IO_BASE; // Interrupt flag (R/W)
static const u16 I_IE = 0xFFFF - IO_BASE; // Interrupt enable (R/W)
+
+ static const PortAccess port_access[256];
};
projects / wenboi.git / commitdiff