Tweaked timing system on 286+ interpreted CPUs - improves DAC sound quality.

src/386.c

@@ -217,12 +217,13 @@ void exec386(int cycs)
         int tempi;
         int cycdiff;
         int oldcyc;
-        int cycle_period = cycs / 2000; /*Use a 5us timing granularity*/
 
         cycles+=cycs;
 //        output=3;
         while (cycles>0)
         {
+                int cycle_period = (timer_count >> TIMER_SHIFT) + 1;
+                
                 cycdiff=0;
                 oldcyc=cycles;
                 timer_start_period(cycles << TIMER_SHIFT);

src/lpt_dac.c

@@ -29,6 +29,8 @@ static void dac_update(lpt_dac_t *lpt_dac)
 static void dac_write_data(uint8_t val, void *p)
 {
         lpt_dac_t *lpt_dac = (lpt_dac_t *)p;
+        
+        timer_clock();
 
         if (lpt_dac->is_stereo)
         {

src/lpt_dss.c

@@ -29,6 +29,8 @@ static void dss_write_data(uint8_t val, void *p)
 {
         dss_t *dss = (dss_t *)p;
 
+        timer_clock();
+
         if ((dss->write_idx - dss->read_idx) < 16)
         {
                 dss->fifo[dss->write_idx & 15] = val;

src/timer.c

@@ -84,7 +84,7 @@ void timer_update_outstanding()
 		if (*timers[c].enable && *timers[c].count < timer_latch)
 			timer_latch = *timers[c].count;
 	}
-	timer_count = timer_latch = (timer_latch + ((1 << TIMER_SHIFT) - 1)) >> TIMER_SHIFT;
+	timer_count = timer_latch = (timer_latch + ((1 << TIMER_SHIFT) - 1));
 }
 
 void timer_reset()