Inverting disassembly line for m6502.PC

A2Mac/DebuggerViewController.swift

@@ -155,6 +155,17 @@ N V - B D I Z C
     }
 
 
+    func invertLine(line : String) -> String {
+        var converted = ""
+
+        for chr in line {
+            converted.append(ViewController.charConvTbl[Int(chr.asciiValue!)])
+        }
+
+        return converted
+    }
+
+
     func DisplayDisassembly() {
         let m6502_saved = m6502
         var disass = ""
@@ -162,8 +173,17 @@ N V - B D I Z C
 //        m6502.PC = 0xFF3A
 
         for _ in 1...35 {
+            let current_line = m6502.PC == m6502_saved.PC
+
             m6502_Disass_1_Instr()
-            disass += String(cString: disassemblyLine()!) + "\n"
+
+            var line = String(cString: disassemblyLine( current_line )!)
+
+            if current_line {
+                line = invertLine(line: line)
+            }
+
+            disass += line + "\n"
         }
 
         DispatchQueue.main.async {

src/util/disassembler.c

@@ -159,7 +159,7 @@ void printDisassembly( FILE * f ) {
 #endif // DISASSEMBLER
 
 
-const char * disassemblyLine(void) {
+const char * disassemblyLine(_Bool highlight) {
     static char line[256];
 
     snprintf( line, sizeof(line), "%s: %-11s%-4s%s",
@@ -169,6 +169,12 @@ const char * disassemblyLine(void) {
          disassembly.oper
     );
 
+    if (highlight) {
+        for (int i = 0; i < sizeof(line); i++) {
+            line[i] &= 0x3F;
+        }
+    }
+
     return line;
 }
 

src/util/disassembler.h

@@ -80,7 +80,7 @@ extern void printDisassembly( FILE * f );
 #endif // DISASSEMBLER
 
 
-extern const char * disassemblyLine(void);
+extern const char * disassemblyLine(_Bool higlight);
 
 
 #endif /* disassembler_h */