[VM][PC98] Implement clock-changing.

diff --git a/source/src/vm/pc9801/pc9801.cpp b/source/src/vm/pc9801/pc9801.cpp
index e997f3e..1505dba 100644 (file)
--- a/source/src/vm/pc9801/pc9801.cpp
+++ b/source/src/vm/pc9801/pc9801.cpp
@@ -87,12 +87,14 @@ VM::VM(EMU* parent_emu) : emu(parent_emu)
        pit_clock_8mhz = false;
 #endif
 #if defined(_PC9801E)
+       cpu_type  = config.cpu_type; 
        if(config.cpu_type != 0) {
                // 8MHz -> 5MHz
                cpu_clocks = 4992030;
                pit_clock_8mhz = false;
        }
 #elif defined(_PC9801VM) || defined(_PC98DO)
+       cpu_type  = config.cpu_type; 
        if(config.cpu_type != 0) {
                // 10MHz -> 8MHz
                cpu_clocks = 7987248;
@@ -1042,6 +1044,50 @@ bool VM::now_skip()
 
 void VM::update_config()
 {
+#if defined(_PC9801E) || defined(_PC9801VM) || defined(_PC98DO)
+       if(cpu_type != config.cpu_type) {
+               uint32 pit_clocks;
+               int cpu_clocks = CPU_CLOCKS;
+#if defined(_PC9801E)
+               if(config.cpu_type != 0) {
+                       // 8MHz -> 5MHz
+                       cpu_clocks = 4992030;
+                       pit_clock_8mhz = false;
+               } else {
+                       // 5MHz -> 8MHz
+                       cpu_clocks = CPU_CLOCKS;
+                       pit_clock_8mhz = true;
+               }
+#elif defined(_PC9801VM) || defined(_PC98DO)
+               if(config.cpu_type != 0) {
+                       // 10MHz -> 8MHz
+                       cpu_clocks = 7987248;
+                       pit_clock_8mhz = true;
+               } else {
+                       cpu_clocks = CPU_CLOCKS;
+                       pit_clock_8mhz = false;
+               }
+#endif
+               uint8 prn_b  = pio_prn->read_signal(SIG_I8255_PORT_B);
+               if(pit_clock_8mhz) {
+                       prn_b |= 0x20;          // system clock is 8MHz
+                       pit_clocks = 1996812;
+               } else {
+                       prn_b &= ~0x20;
+                       pit_clocks = 2457600;
+               }
+               pio_prn->write_signal(SIG_I8255_PORT_B, prn_b, 0xff);
+               pit->set_constant_clock(0, pit_clocks);
+               pit->set_constant_clock(1, pit_clocks);
+               pit->set_constant_clock(2, pit_clocks);
+               event->set_cpu_clock(cpu, cpu_clocks);
+#if defined(_PC98DO)
+               pc88event->set_cpu_clock(pc88cpu, (config.cpu_type != 0) ? 3993624 : 7987248);
+#endif
+               cpu_type = config.cpu_type;
+       }
+#endif
+   
 #if defined(_PC98DO)
        if(boot_mode != config.boot_mode) {
                // boot mode is changed !!!

diff --git a/source/src/vm/pc9801/pc9801.h b/source/src/vm/pc9801/pc9801.h
index 686a8e5..819edc1 100644 (file)
--- a/source/src/vm/pc9801/pc9801.h
+++ b/source/src/vm/pc9801/pc9801.h
@@ -294,7 +294,7 @@ protected:
        uint8 fd_bios_2dd[0x1000];
 #endif
        bool pit_clock_8mhz;
-       
+       int cpu_type;
 #if defined(_PC98DO)
        EVENT* pc88event;