Debugger: Fix DEBUG_Run() to manage CPU cycle count such that time ad…

…vances only the amount, not any more than that. Show current PIC time and whether CPU is in HLT state in debugger UI

CHANGELOG

@@ -1,4 +1,7 @@
 Next:
+  - Debugger UI now shows PIC_FullIndex() and whether or not the CPU is
+    in the HLT state. Single stepping does not do anything when the CPU is
+    in the HLT state, so at least let the user know (joncampbell123).
   - Keyboard controller (IBM PC): Cancel the IRQ signal upon reading I/O
     port 60h. The reason for the IRQ, the pending data, was just read, so
     now there is no point in keeping the IRQ signal up. This fixes Escape

src/cpu/cpu.cpp

@@ -3148,6 +3148,10 @@ Bits HLT_Decode(void) {
 	return 0;
 }
 
+bool CPU_IsHLTed(void) {
+	return (cpudecoder == &HLT_Decode);
+}
+
 void CPU_HLT(uint32_t oldeip) {
 	/* Since cpu.hlt.old_decoder assigns the current decoder to old, and relies on restoring
 	 * it back when finished, setting cpudecoder to HLT_Decode while already HLT_Decode effectively

src/debug/debug.cpp

@@ -1116,6 +1116,8 @@ void DrawRegistersUpdateOld(void) {
 	oldcpucpl=cpu.cpl;
 }
 
+bool CPU_IsHLTed(void);
+
 static void DrawRegisters(void) {
 	if (dbg.win_main == NULL || dbg.win_reg == NULL)
 		return;
@@ -1191,7 +1193,7 @@ static void DrawRegisters(void) {
 	} else {
 		mvwprintw(dbg.win_reg,0,76,"Real");
 		mvwprintw(dbg.win_reg,2,62,"NOPG");
-    }
+	}
 
 	// Selector info, if available
 	if ((cpu.pmode) && curSelectorName[0]) {
@@ -1202,7 +1204,13 @@ static void DrawRegisters(void) {
 	}
 
 	wattrset(dbg.win_reg,0);
-	mvwprintw(dbg.win_reg,3,60,"%u       ",cycle_count);
+
+	mvwprintw(dbg.win_reg,3,60,"cc=%-8u ",cycle_count);
+	if (CPU_IsHLTed()) mvwprintw(dbg.win_reg,3,73,"HLT ");
+	else mvwprintw(dbg.win_reg,3,73,"RUN ");
+
+	mvwprintw(dbg.win_reg,4,60,"pfi=%-6.9f ",(double)PIC_FullIndex());
+
 	wrefresh(dbg.win_reg);
 }
 
@@ -3894,6 +3902,7 @@ extern "C" INPUT_RECORD * _pdcurses_hax_inputrecord(void);
 
 int32_t DEBUG_Run(int32_t amount,bool quickexit) {
 	skipFirstInstruction = true;
+	CPU_CycleLeft += CPU_Cycles - amount;
 	CPU_Cycles = amount;
 	int32_t ret = (int32_t)(*cpudecoder)();
 	if (quickexit) SetCodeWinStart();