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Implement everything for Gameboy Doctor

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This commit is contained in:
madmaurice 2023-09-01 23:19:02 +02:00
parent 66c19caaee
commit c52aa91f26
8 changed files with 136 additions and 14 deletions

12
memory/bus.cpp
View file

@ -13,9 +13,9 @@ std::optional<Bus::MapEntry> Bus::find_entry(u16 addr)
return {};
}
void Bus::map_device(u16 start, u16 end, Mem_device* dev)
void Bus::map_device(u16 start, u16 end, Mem_device* dev, u16 offset)
{
map.push_back(Bus::MapEntry{ Range(start,end), dev });
map.push_back(Bus::MapEntry{ Range(start,end), offset, dev });
}
void Bus::write8(u16 addr, u8 data)
@ -24,7 +24,7 @@ void Bus::write8(u16 addr, u8 data)
if(!mapentry) return;
mapentry->dev->write8(addr - mapentry->range.start, data);
mapentry->dev->write8(addr - mapentry->range.start + mapentry->offset, data);
}
u8 Bus::read8(u16 addr)
@ -33,19 +33,19 @@ u8 Bus::read8(u16 addr)
if(!mapentry) return 0xFFu;
return mapentry->dev->read8(addr - mapentry->range.start);
return mapentry->dev->read8(addr - mapentry->range.start + mapentry->offset);
}
void Bus::write16(u16 addr, u16 data)
{
auto mapentry = find_entry(addr);
if(!mapentry) return;
mapentry->dev->write16(addr - mapentry->range.start, data);
mapentry->dev->write16(addr - mapentry->range.start + mapentry->offset, data);
}
u16 Bus::read16(u16 addr)
{
auto mapentry = find_entry(addr);
if(!mapentry) return 0xFFFFu;
return mapentry->dev->read16(addr - mapentry->range.start);
return mapentry->dev->read16(addr - mapentry->range.start + mapentry->offset);
}

3
memory/bus.h
View file

@ -9,6 +9,7 @@ class Bus : public Mem_device {
private:
struct MapEntry {
Range range;
u16 offset;
Mem_device *dev;
};
@ -17,7 +18,7 @@ private:
public:
Bus();
void map_device(u16 start, u16 end, Mem_device* dev);
void map_device(u16 start, u16 end, Mem_device* dev, u16 offset = 0x0);
virtual void write8(u16 addr, u8 data);
virtual u8 read8(u16 addr);

6
memory/register.cpp
View file

@ -11,3 +11,9 @@ u8 BoundRegister::read8(u16 addr)
if(addr) return 0xFF;
return reg;
}
void ConstRegister::write8(u16 addr, u8 data)
{}
u8 ConstRegister::read8(u16 addr)
{ return value; }

13
memory/register.h
View file

@ -15,3 +15,16 @@ public:
virtual void write8(u16 addr, u8 data);
virtual u8 read8(u16 addr);
};
class ConstRegister : public Mem_device {
private:
u8 value;
public:
inline
ConstRegister(u8 value)
: value(value)
{}
virtual void write8(u16 addr, u8 data);
virtual u8 read8(u16 addr);
};