Feature: Russian KR1878 8-bit processor

Added disassembler support for Angstrem KR1878 processor.

src/Arch/Angstrem/Angstrem.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+    <Import Project="$(ProjectDir)../../Drivers/CommonBuildProperties.items"/>
+	<PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+	  <RootNamespace>Reko.Arch.Angstrem</RootNamespace>
+	  <AssemblyName>Reko.Arch.Angstrem</AssemblyName>
+	  <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
+  </PropertyGroup>
+
+	<ItemGroup>
+		<ProjectReference Include="../../Core/Core.csproj" />
+	</ItemGroup>
+</Project>

src/Arch/Angstrem/KR1878Architecture.cs

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+#region License
+/* 
+ * Copyright (C) 1999-2024 John Källén.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#endregion
+
+using Reko.Core;
+using Reko.Core.Expressions;
+using Reko.Core.Machine;
+using Reko.Core.Memory;
+using Reko.Core.Rtl;
+using Reko.Core.Types;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Reko.Arch.Angstrem
+{
+    public class KR1878Architecture : ProcessorArchitecture
+    {
+        public KR1878Architecture(IServiceProvider services, string archId, Dictionary<string, object> options) 
+            : base(services, archId, options, new(), new())
+        {
+            this.Endianness = EndianServices.Little;
+            this.CarryFlag = null; //$TODO
+            this.CodeMemoryGranularity = 8;
+            this.MemoryGranularity = 8;
+            this.FramePointerType = PrimitiveType.Byte;
+            this.WordWidth = PrimitiveType.Byte;
+        }
+
+        public override IEnumerable<MachineInstruction> CreateDisassembler(EndianImageReader rdr)
+        {
+            return new KR1878Disassembler(this, rdr);
+        }
+
+        public override IEqualityComparer<MachineInstruction>? CreateInstructionComparer(Normalize norm)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override IEnumerable<Address> CreatePointerScanner(SegmentMap map, EndianImageReader rdr, IEnumerable<Address> knownAddresses, PointerScannerFlags flags)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override ProcessorState CreateProcessorState()
+        {
+            throw new NotImplementedException();
+        }
+
+        public override IEnumerable<RtlInstructionCluster> CreateRewriter(EndianImageReader rdr, ProcessorState state, IStorageBinder binder, IRewriterHost host)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override FlagGroupStorage? GetFlagGroup(RegisterStorage flagRegister, uint grf)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override FlagGroupStorage? GetFlagGroup(string name)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override SortedList<string, int> GetMnemonicNames()
+        {
+            throw new NotImplementedException();
+        }
+
+        public override int? GetMnemonicNumber(string name)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override RegisterStorage[] GetRegisters()
+        {
+            throw new NotImplementedException();
+        }
+
+        public override string GrfToString(RegisterStorage flagRegister, string prefix, uint grf)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override Address MakeAddressFromConstant(Constant c, bool codeAlign)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override Address? ReadCodeAddress(int size, EndianImageReader rdr, ProcessorState? state)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override bool TryParseAddress(string? txtAddr, [MaybeNullWhen(false)] out Address addr)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}