Cleaned up turbo handling.

src/cpu.c

@@ -7,6 +7,9 @@
 #include "pci.h"
 #include "codegen.h"
 
+static int cpu_turbo_speed, cpu_nonturbo_speed;
+static int cpu_turbo = 1;
+
 int isa_cycles;
 int has_vlb;
 static uint8_t ccr0, ccr1, ccr2, ccr3, ccr4, ccr5, ccr6;
@@ -505,6 +508,14 @@ void cpu_set()
         ccr0 = ccr1 = ccr2 = ccr3 = ccr4 = ccr5 = ccr6 = 0;
         has_vlb = (cpu_s->cpu_type >= CPU_i486SX) && (cpu_s->cpu_type <= CPU_Cx5x86);
 
+        cpu_turbo_speed = cpu_s->rspeed;
+        if (cpu_s->cpu_type < CPU_286)
+                cpu_nonturbo_speed = 4772728;
+        else if (cpu_s->rspeed < 8000000)
+                cpu_nonturbo_speed = cpu_s->rspeed;
+        else
+                cpu_nonturbo_speed = 8000000;
+
         cpu_update_waitstates();
   
         isa_cycles = cpu_s->atclk_div;      
@@ -1670,3 +1681,29 @@ void cpu_update_waitstates()
                 cpu_prefetch_cycles *= 4;
         cpu_mem_prefetch_cycles = cpu_prefetch_cycles;
 }
+
+void cpu_set_turbo(int turbo)
+{
+        if (cpu_turbo != turbo)
+        {
+                cpu_turbo = turbo;
+
+                cpu_s = &models[model].cpu[cpu_manufacturer].cpus[cpu];
+                if (cpu_s->cpu_type >= CPU_286)
+                {
+                        if (cpu_turbo)
+                                setpitclock(cpu_turbo_speed);
+                        else
+                                setpitclock(cpu_nonturbo_speed);
+                }
+                else
+                        setpitclock(14318184.0);
+        }
+}
+
+int cpu_get_speed()
+{
+        if (cpu_turbo)
+                return cpu_turbo_speed;
+        return cpu_nonturbo_speed;
+}

src/cpu.h

@@ -148,6 +148,8 @@ extern int isa_cycles;
 void cpu_update_waitstates();
 void cpu_set();
 void cpu_set_edx();
+void cpu_set_turbo(int turbo);
+int cpu_get_speed();
 
 extern int has_vlb;
 

src/ibm.h

@@ -273,7 +273,6 @@ extern uint8_t opcode;
 extern int insc;
 extern int fpucount;
 extern float mips,flops;
-extern int clockrate;
 extern int cgate16;
 extern int CPUID;
 

src/pc.c

@@ -70,7 +70,6 @@ int cycles_lost = 0;
 
 int config_override = 0;
 
-int clockrate;
 int insc=0;
 float mips,flops;
 extern int mmuflush;
@@ -361,6 +360,7 @@ void resetpc()
 {
         cpu_set();
         pc_reset();
+        cpu_set_turbo(1);
 //        cpuspeed2=(AT)?2:1;
 //        atfullspeed=0;
 ///*        if (romset==ROM_AMI386 || romset==ROM_AMI486) */fullspeed();
@@ -467,6 +467,7 @@ void resetpchard()
 	}
 
         sound_update_buf_length();
+        cpu_set_turbo(1);
 }
 
 char romsets[17][40]={"IBM PC","IBM XT","Generic Turbo XT","Euro PC","Tandy 1000","Amstrad PC1512","Sinclair PC200","Amstrad PC1640","IBM AT","AMI 286 clone","Dell System 200","Misc 286","IBM AT 386","Misc 386","386 clone","486 clone","486 clone 2"};
@@ -490,21 +491,21 @@ void runpc()
 {
         char s[200];
         int done=0;
+        int cycles_to_run = cpu_get_speed() / 100;
 
         startblit();
-        clockrate = models[model].cpu[cpu_manufacturer].cpus[cpu].rspeed;
         
         if (is386)   
         {
                 if (cpu_use_dynarec)
-                        exec386_dynarec(models[model].cpu[cpu_manufacturer].cpus[cpu].rspeed / 100);
+                        exec386_dynarec(cycles_to_run);
                 else
-                        exec386(models[model].cpu[cpu_manufacturer].cpus[cpu].rspeed / 100);
+                        exec386(cycles_to_run);
         }
         else if (AT)
-                exec386(models[model].cpu[cpu_manufacturer].cpus[cpu].rspeed / 100);
+                exec386(cycles_to_run);
         else
-                execx86(models[model].cpu[cpu_manufacturer].cpus[cpu].rspeed / 100);
+                execx86(cycles_to_run);
         
         keyboard_poll_host();
         keyboard_process();

src/pit.c

@@ -41,7 +41,7 @@ void setpitclock(float clock)
 //        pclog("PITCONST=%f CGACONST=%f\n", PITCONST, CGACONST);
 //        pclog("CPUMULTI=%g\n", ((14318184.0*(double)(1 << TIMER_SHIFT)) / (double)models[model].cpu[cpu_manufacturer].cpus[cpu].rspeed));
         
-        xt_cpu_multi = (int)((14318184.0*(double)(1 << TIMER_SHIFT)) / (double)models[model].cpu[cpu_manufacturer].cpus[cpu].rspeed);
+        xt_cpu_multi = (int)((14318184.0*(double)(1 << TIMER_SHIFT)) / (double)cpu_get_speed());
 //        pclog("egacycles %i egacycles2 %i temp %f clock %f\n",egacycles,egacycles2,temp,clock);
 /*        if (video_recalctimings)
                 video_recalctimings();*/

src/t1000.c

@@ -391,16 +391,9 @@ static void t1200_turbo_set(uint8_t value)
 	}
 	t1000.turbo = value;
 	if (!value)
-	{
-		int c = cpu;
-		cpu = 0;	/* 8088/4.77MHz */
-		cpu_set();
-		cpu = c;
-	}
+                cpu_set_turbo(0);
 	else
-	{
-		cpu_set();
-	}
+                cpu_set_turbo(1);
 }
 
 static void write_t1000_ctl(uint16_t addr, uint8_t val, void *priv)

src/t3100e.c

@@ -376,16 +376,9 @@ void t3100e_turbo_set(uint8_t value)
 {
 	t3100e_ems.turbo = value;
 	if (!value)
-	{
-		int c = cpu;
-		cpu = 0;	/* 286/6 */
-		cpu_set();
-		cpu = c;
-	}
+	       cpu_set_turbo(0);
 	else
-	{
-		cpu_set();
-	}
+	       cpu_set_turbo(1);
 }
 
 

src/wx-sdl2-status.c

@@ -145,7 +145,7 @@ int get_status(char* machine, char* device)
         #endif*/
                 segareads,
                 segawrites,
-                clockrate - scycles_lost,
+                cpu_get_speed() - scycles_lost,
                 pit_timer0_freq(),
                 ((double)main_time * 100.0) / status_diff,
                 ((double)main_time * 100.0) / timer_freq,

src/xi8088.c

@@ -29,15 +29,12 @@ void xi8088_turbo_set(uint8_t value)
         if (!value)
         {
                 pclog("Xi8088 turbo off\n");
-                int c = cpu;
-                cpu = 0;        /* 8088/4.77 */
-                cpu_set();
-                cpu = c;
+                cpu_set_turbo(0);
         }
         else
         {
                 pclog("Xi8088 turbo on\n");
-                cpu_set();
+                cpu_set_turbo(1);
         }
 }