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72 lines
2 KiB
C
72 lines
2 KiB
C
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#include "Gbs_Emu.h"
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#include "blargg_source.h"
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int Gbs_Emu::cpu_read( gb_addr_t addr )
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{
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int result = *cpu::get_code( addr );
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if ( unsigned (addr - Gb_Apu::start_addr) < Gb_Apu::register_count )
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result = apu.read_register( clock(), addr );
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#ifndef NDEBUG
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else if ( unsigned (addr - 0x8000) < 0x2000 || unsigned (addr - 0xE000) < 0x1F00 )
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debug_printf( "Read from unmapped memory $%.4x\n", (unsigned) addr );
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else if ( unsigned (addr - 0xFF01) < 0xFF80 - 0xFF01 )
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debug_printf( "Unhandled I/O read 0x%4X\n", (unsigned) addr );
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#endif
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return result;
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}
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void Gbs_Emu::cpu_write( gb_addr_t addr, int data )
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{
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unsigned offset = addr - ram_addr;
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if ( offset <= 0xFFFF - ram_addr )
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{
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ram [offset] = data;
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if ( (addr ^ 0xE000) <= 0x1F80 - 1 )
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{
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if ( unsigned (addr - Gb_Apu::start_addr) < Gb_Apu::register_count )
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{
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GME_APU_HOOK( this, addr - Gb_Apu::start_addr, data );
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apu.write_register( clock(), addr, data );
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}
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else if ( (addr ^ 0xFF06) < 2 )
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update_timer();
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else if ( addr == joypad_addr )
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ram [offset] = 0; // keep joypad return value 0
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else
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ram [offset] = 0xFF;
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//if ( addr == 0xFFFF )
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// debug_printf( "Wrote interrupt mask\n" );
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}
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}
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else if ( (addr ^ 0x2000) <= 0x2000 - 1 )
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{
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set_bank( data );
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}
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#ifndef NDEBUG
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else if ( unsigned (addr - 0x8000) < 0x2000 || unsigned (addr - 0xE000) < 0x1F00 )
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{
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debug_printf( "Wrote to unmapped memory $%.4x\n", (unsigned) addr );
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}
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#endif
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}
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#define CPU_READ_FAST( cpu, addr, time, out ) \
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CPU_READ_FAST_( STATIC_CAST(Gbs_Emu*,cpu), addr, time, out )
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#define CPU_READ_FAST_( emu, addr, time, out ) \
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{\
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out = READ_PROG( addr );\
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if ( unsigned (addr - Gb_Apu::start_addr) < Gb_Apu::register_count )\
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out = emu->apu.read_register( emu->cpu_time - time * clocks_per_instr, addr );\
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else\
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check( out == emu->cpu_read( addr ) );\
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}
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#define CPU_READ( cpu, addr, time ) \
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STATIC_CAST(Gbs_Emu*,cpu)->cpu_read( addr )
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#define CPU_WRITE( cpu, addr, data, time ) \
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STATIC_CAST(Gbs_Emu*,cpu)->cpu_write( addr, data )
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