X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fm68000%2Fm68kinterface.c;h=8dab55d7690610964ab1e6efaeaa5ab04b2548fc;hb=0d7e70c5e34e691b15365901951700f43242065f;hp=dd5dfc1e74f1b7aea3880294f3621b9bdf2807a2;hpb=de1d20fbba4c7df976cf828ded494a29c7c5b677;p=virtualjaguar

diff --git a/src/m68000/m68kinterface.c b/src/m68000/m68kinterface.c
index dd5dfc1..8dab55d 100644
--- a/src/m68000/m68kinterface.c
+++ b/src/m68000/m68kinterface.c
@@ -127,6 +127,18 @@ void DumpRegisters(void)
 #endif
 
 
+void M68KDebugHalt(void)
+{
+	regs.spcflags |= SPCFLAG_DEBUGGER;
+}
+
+
+void M68KDebugResume(void)
+{
+	regs.spcflags &= ~SPCFLAG_DEBUGGER;
+}
+
+
 void m68k_set_cpu_type(unsigned int type)
 {
 }
@@ -187,6 +199,7 @@ void m68k_pulse_reset(void)
 	REG_PC = m68ki_read_imm_32();
 	m68ki_jump(REG_PC);
 #else
+	regs.spcflags = 0;
 	regs.stopped = 0;
 	regs.remainingCycles = 0;
 	
@@ -233,6 +246,17 @@ int m68k_execute(int num_cycles)
 	/* Main loop.  Keep going until we run out of clock cycles */
 	do
 	{
+		// This is so our debugging code can break in on a dime.
+		// Otherwise, this is just extra slow down :-P
+		if (regs.spcflags & SPCFLAG_DEBUGGER)
+		{
+			// Not sure this is correct... :-P
+			num_cycles = initialCycles - regs.remainingCycles;
+			regs.remainingCycles = 0;	// int32_t
+			regs.interruptCycles = 0;	// uint32_t
+
+			return num_cycles;
+		}
 #if 0
 		/* Set tracing accodring to T1. (T0 is done inside instruction) */
 		m68ki_trace_t1(); /* auto-disable (see m68kcpu.h) */
@@ -465,12 +489,14 @@ void m68ki_exception_interrupt(uint32_t intLevel)
 	CPU_INT_LEVEL = 0;
 #endif /* M68K_EMULATE_INT_ACK */
 #else
-	// Turn off the stopped state
+	// Turn off the stopped state (N.B.: normal 68K behavior!)
 	regs.stopped = 0;
 
 //JLH: need to add halt state?
+// prolly, for debugging/alpine mode... :-/
+// but then again, this should be handled already by the main execution loop :-P
 	// If we are halted, don't do anything
-//	if (CPU_STOPPED)
+//	if (regs.stopped)
 //		return;
 
 	// Acknowledge the interrupt (NOTE: This is a user supplied function!)