From ea0561940245628c39fe1ae496abeafcf2f2fa07 Mon Sep 17 00:00:00 2001
From: Thomas Jentzsch <tjentzsch@yahoo.de>
Date: Sat, 20 Aug 2022 20:00:03 +0200
Subject: [PATCH] added "swchb" command to debugger

---
 docs/debugger.html              |  1 +
 src/debugger/DebuggerParser.cxx | 22 ++++++++++++++++++++--
 src/debugger/DebuggerParser.hxx |  3 ++-
 src/debugger/RiotDebug.cxx      | 10 ++++++++++
 src/debugger/RiotDebug.hxx      |  1 +
 5 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/docs/debugger.html b/docs/debugger.html
index 90a221cf9..206a7bc2a 100644
--- a/docs/debugger.html
+++ b/docs/debugger.html
@@ -1017,6 +1017,7 @@ clearSaveStateIfs - Clear all saveState points
          scanLine - Advance emulation by &lt;xx&gt; scanlines (default=1)
              step - Single step CPU [with count xx]
         stepWhile - Single step CPU while &lt;condition&gt; is true
+	    swchb - Set SWCHB to value xx
               tia - Show TIA state
             trace - Single step CPU over subroutines [with count xx]
              trap - Trap read/write access to address(es) xx [yy]
diff --git a/src/debugger/DebuggerParser.cxx b/src/debugger/DebuggerParser.cxx
index 41a2a910d..1982abd1a 100644
--- a/src/debugger/DebuggerParser.cxx
+++ b/src/debugger/DebuggerParser.cxx
@@ -148,7 +148,9 @@ string DebuggerParser::exec(const FSNode& file, StringList* history)
       if(!getline(in, command))
         break;
 
+      ++execDepth;
       run(command);
+      --execDepth;
       if (history != nullptr)
         history->push_back(command);
       count++;
@@ -1315,9 +1317,7 @@ void DebuggerParser::executeExec()
   // make sure the commands are added to prompt history
   StringList history;
 
-  ++execDepth;
   commandResult << exec(node, &history);
-  --execDepth;
 
   for(const auto& item: history)
     debugger.prompt().addToHistory(item.c_str());
@@ -2159,6 +2159,14 @@ void DebuggerParser::executeStepWhile()
   commandResult << "executed " << ncycles << " cycles";
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+// "swchb"
+void DebuggerParser::executeSwchb()
+{
+  debugger.riotDebug().switches(args[0]);
+  commandResult << "SWCHB set to " << std::hex << std::setw(2) << std::setfill('0') << args[0];
+}
+
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 // "tia"
 void DebuggerParser::executeTia()
@@ -3381,6 +3389,16 @@ DebuggerParser::CommandArray DebuggerParser::commands = { {
     std::mem_fn(&DebuggerParser::executeStepWhile)
   },
 
+  {
+    "swchb",
+    "Set SWCHB to xx",
+    "Example: swchb fe",
+    true,
+    true,
+    { Parameters::ARG_WORD, Parameters::ARG_END_ARGS },
+    std::mem_fn(&DebuggerParser::executeSwchb)
+  },
+
   {
     "tia",
     "Show TIA state",
diff --git a/src/debugger/DebuggerParser.hxx b/src/debugger/DebuggerParser.hxx
index dbfa4408c..bd8394e4f 100644
--- a/src/debugger/DebuggerParser.hxx
+++ b/src/debugger/DebuggerParser.hxx
@@ -101,7 +101,7 @@ class DebuggerParser
       std::array<Parameters, 10> parms;
       std::function<void (DebuggerParser*)> executor;
     };
-    using CommandArray = std::array<Command, 103>;
+    using CommandArray = std::array<Command, 104>;
     static CommandArray commands;
 
     struct Trap
@@ -234,6 +234,7 @@ class DebuggerParser
     void executeScanLine();
     void executeStep();
     void executeStepWhile();
+    void executeSwchb();
     void executeTia();
     void executeTrace();
     void executeTrap();
diff --git a/src/debugger/RiotDebug.cxx b/src/debugger/RiotDebug.cxx
index c8087d6f8..e3868d75b 100644
--- a/src/debugger/RiotDebug.cxx
+++ b/src/debugger/RiotDebug.cxx
@@ -257,6 +257,16 @@ int RiotDebug::timReadCycles() const
   return mySystem.m6532().myTimReadCycles;
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+bool RiotDebug::switches(int newVal)
+{
+  uInt8& switches = myConsole.switches().mySwitches;
+  if(newVal > -1)
+    switches = newVal;
+
+  return switches;
+}
+
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 bool RiotDebug::diffP0(int newVal)
 {
diff --git a/src/debugger/RiotDebug.hxx b/src/debugger/RiotDebug.hxx
index 2aa43bf84..ef90ec4db 100644
--- a/src/debugger/RiotDebug.hxx
+++ b/src/debugger/RiotDebug.hxx
@@ -89,6 +89,7 @@ class RiotDebug : public DebuggerSystem
     int intimAsInt() const { return static_cast<int>(intim()); }   // so we can use _inTim pseudo-register
 
     /* Console switches */
+    bool switches(int newVal = -1);
     bool diffP0(int newVal = -1);
     bool diffP1(int newVal = -1);
     bool tvType(int newVal = -1);