Initial commit

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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