Add linker config scripts to cc65 generator output

The system configuration you get with "-t none" works for smaller
files but fails for larger ones.  This updates the generator to
produce a source file and linker script pair.  (I kinda saw this
one coming -- it's why the gen/asm dialog has a combo box for the
file preview -- so it didn't require that much work.)

This currently generates a fixed script for a generic system with
64KiB of RAM, using .ORGs to set the addresses as before.

With this change, assembling a file with 65536 NOPs succeeds.

(issue #39)

SourceGen/AsmGen/AsmCc65.cs

@@ -31,6 +31,7 @@ namespace SourceGen.AsmGen {
     /// </summary>
     public class GenCc65 : IGenerator {
         private const string ASM_FILE_SUFFIX = "_cc65.S";       // must start with underscore
+        private const string CFG_FILE_SUFFIX = "_cc65.cfg";     // ditto
         private const int MAX_OPERAND_LEN = 64;
 
         // IGenerator
@@ -197,9 +198,10 @@ namespace SourceGen.AsmGen {
         public List<string> GenerateSource(BackgroundWorker worker) {
             List<string> pathNames = new List<string>(1);
 
-            string fileName = mFileNameBase + ASM_FILE_SUFFIX;
+            string pathName = Path.Combine(mWorkDirectory, mFileNameBase + ASM_FILE_SUFFIX);
-            string pathName = Path.Combine(mWorkDirectory, fileName);
             pathNames.Add(pathName);
+            string cfgName = Path.Combine(mWorkDirectory, mFileNameBase + CFG_FILE_SUFFIX);
+            pathNames.Add(cfgName);
 
             Formatter.FormatConfig config = new Formatter.FormatConfig();
             GenCommon.ConfigureFormatterFromSettings(Settings, ref config);
@@ -216,6 +218,9 @@ namespace SourceGen.AsmGen {
             }
 
             // Use UTF-8 encoding, without a byte-order mark.
+            using (StreamWriter sw = new StreamWriter(cfgName, false, new UTF8Encoding(false))) {
+                GenerateLinkerScript(sw);
+            }
             using (StreamWriter sw = new StreamWriter(pathName, false, new UTF8Encoding(false))) {
                 mOutStream = sw;
 
@@ -232,7 +237,8 @@ namespace SourceGen.AsmGen {
                     // Currently generating code for v2.17.
                     OutputLine(SourceFormatter.FullLineCommentDelimiter +
                         string.Format(Properties.Resources.GENERATED_FOR_VERSION,
-                        "cc65", V2_17, AsmCc65.OPTIONS));
+                        "cc65", V2_17,
+                        AsmCc65.OPTIONS + " -C " + Path.GetFileName(cfgName)));
                 }
 
                 GenCommon.Generate(this, sw, worker);
@@ -242,6 +248,21 @@ namespace SourceGen.AsmGen {
             return pathNames;
         }
 
+        private void GenerateLinkerScript(StreamWriter sw) {
+            sw.WriteLine("# 6502bench SourceGen generated linker script for " + mFileNameBase);
+
+            sw.WriteLine("MEMORY {");
+            sw.WriteLine("    MAIN: file=%O, start=%S, size=65536;");
+            sw.WriteLine("}");
+
+            sw.WriteLine("SEGMENTS {");
+            sw.WriteLine("    CODE: load=MAIN, type=rw;");
+            sw.WriteLine("}");
+
+            sw.WriteLine("FEATURES {}");
+            sw.WriteLine("SYMBOLS {}");
+        }
+
         // IGenerator
         public void OutputAsmConfig() {
             CpuDef cpuDef = Project.CpuDef;
@@ -700,6 +721,8 @@ namespace SourceGen.AsmGen {
     /// Cross-assembler execution interface.
     /// </summary>
     public class AsmCc65 : IAssembler {
+        // Fixed options.  "--target none" is needed to neutralize the character encoding,
+        // which seems to default to PETSCII.
         public const string OPTIONS = "--target none";
 
         // Paths from generator.
@@ -770,15 +793,9 @@ namespace SourceGen.AsmGen {
 
         // IAssembler
         public AssemblerResults RunAssembler(BackgroundWorker worker) {
-            // Reduce input file to a partial path if possible.  This is really just to make
+            Debug.Assert(mPathNames.Count == 2);
-            // what we display to the user a little easier to read.
+            string pathName = StripWorkDirectory(mPathNames[0]);
-            string pathName = mPathNames[0];
+            string cfgName = StripWorkDirectory(mPathNames[1]);
-            if (pathName.StartsWith(mWorkDirectory)) {
-                pathName = pathName.Remove(0, mWorkDirectory.Length + 1);
-            } else {
-                // Unexpected, but shouldn't be a problem.
-                Debug.WriteLine("NOTE: source file is not in work directory");
-            }
 
             AssemblerConfig config =
                 AssemblerConfig.GetConfig(AppSettings.Global, AssemblerInfo.Id.Cc65);
@@ -787,12 +804,14 @@ namespace SourceGen.AsmGen {
                 return null;
             }
 
+            string cfgOpt = " -C \"" + cfgName + "\"";
+
             worker.ReportProgress(0, Properties.Resources.PROGRESS_ASSEMBLING);
 
             // Wrap pathname in quotes in case it has spaces.
             // (Do we need to shell-escape quotes in the pathName?)
             ShellCommand cmd = new ShellCommand(config.ExecutablePath,
-                OPTIONS + " \"" + pathName + "\"", mWorkDirectory, null);
+                OPTIONS + cfgOpt + " \"" + pathName + "\"", mWorkDirectory, null);
             cmd.Execute();
 
             // Can't really do anything with a "cancel" request.
@@ -804,6 +823,22 @@ namespace SourceGen.AsmGen {
             return new AssemblerResults(cmd.FullCommandLine, cmd.ExitCode, cmd.Stdout,
                 cmd.Stderr, outputFile);
         }
+
+        /// <summary>
+        /// Reduce input file to a partial path if possible.  This is just to make
+        /// what we display to the user a little easier to read.
+        /// </summary>
+        /// <param name="pathName">Full pathname of file.</param>
+        /// <returns>Pathname with working directory prefix stripped off.</returns>
+        private string StripWorkDirectory(string pathName) {
+            if (pathName.StartsWith(mWorkDirectory)) {
+                return pathName.Remove(0, mWorkDirectory.Length + 1);
+            } else {
+                // Unexpected, but shouldn't be a problem.
+                Debug.WriteLine("NOTE: source file is not in work directory");
+                return pathName;
+            }
+        }
     }
 
     #endregion IAssembler

SourceGen/SGTestData/Expected/1000-allops-value-65816_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 1000-allops-value-65816
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/1001-allops-zero-65816_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 1001-allops-zero-65816
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/1002-embedded-instructions_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 1002-embedded-instructions
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/1003-flags-and-branches_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 1003-flags-and-branches
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/1004-data-recognition_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 1004-data-recognition
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2000-allops-value-6502_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2000-allops-value-6502
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2001-allops-zero-6502_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2001-allops-zero-6502
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2002-allops-value-65C02_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2002-allops-value-65C02
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2003-allops-zero-65C02_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2003-allops-zero-65C02
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2004-numeric-types_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2004-numeric-types
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2005-string-types_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2005-string-types
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2006-operand-formats_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2006-operand-formats
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2007-labels-and-symbols_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2007-labels-and-symbols
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2008-address-changes_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2008-address-changes
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2009-branches-and-banks_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2009-branches-and-banks
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2010-target-adjustment_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2010-target-adjustment
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2011-hinting_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2011-hinting
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2012-label-localizer_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2012-label-localizer
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2013-notes-and-comments_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2013-notes-and-comments
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}

SourceGen/SGTestData/Expected/2014-label-dp_cc65.cfg

@@ -0,0 +1,9 @@
+# 6502bench SourceGen generated linker script for 2014-label-dp
+MEMORY {
+    MAIN: file=%O, start=%S, size=65536;
+}
+SEGMENTS {
+    CODE: load=MAIN, type=rw;
+}
+FEATURES {}
+SYMBOLS {}