diff options
Diffstat (limited to 'Chip/Bus.cs')
| -rw-r--r-- | Chip/Bus.cs | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/Chip/Bus.cs b/Chip/Bus.cs new file mode 100644 index 0000000..e8cf5ad --- /dev/null +++ b/Chip/Bus.cs @@ -0,0 +1,55 @@ +namespace Q1Emu.Chip; + +using System.Collections.Generic; +using System.Linq; + +public class Bus : BusDevice +{ + public List<BusDevice> Devices; + + public Bus(u16 addressableStart, u16 addressableEnd) : base(addressableStart, addressableEnd) + { + this.Devices = []; + } + private BusDevice? GetDevice(u16 address) + { + BusDevice? device = this.Devices.FirstOrDefault(x => address >= x.AddressableStart && address < x.AddressableEnd); + return device; + } + + public override u8 Read(u16 address) + { + BusDevice? device = GetDevice(address); + if (device == null) + return 0; + + return device.Read(address); + } + + public override void Write(u16 address, u8 value) + { + BusDevice? device = GetDevice(address); + if (device == null) + return; + + device.Write(address, value); + } + + public override ref8 ReadSeq(u16 address, u16 length) + { + BusDevice? device = this.GetDevice(address); + if (device == null) + return []; + + return device.ReadSeq(address, length); + } + + public override void WriteSeq(u16 address, u16 length, ref8 value) + { + BusDevice? device = this.GetDevice(address); + if (device == null) + return; + + device.WriteSeq(address, length, value); + } +}
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