--- generator/main/cpuz80-mz80.c	2020/03/04 04:46:43	1.1
+++ generator/main/cpuz80-mz80.c	2020/03/04 04:47:06	1.1.1.3
@@ -18,32 +18,33 @@ void cpuz80_iowrite_actual(UINT16 addr,
 
 uint8 *cpuz80_ram = NULL;
 uint32 cpuz80_bank = 0;
-unsigned int cpuz80_active = 0;
+uint8 cpuz80_resetting = 0;
+uint8 cpuz80_active = 0;
+unsigned int cpuz80_on = 1;     /* z80 turned on? */
 CONTEXTMZ80 cpuz80_z80;
 
 /*** global variables ***/
 
 static unsigned int cpuz80_lastsync = 0;
-static unsigned int cpuz80_resetting = 0;
 
 static struct MemoryReadByte cpuz80_read[] = {
-  { 0x0000, 0xFFFF, cpuz80_read_actual, NULL },
-  { -1, -1, NULL, NULL }
+  {0x0000, 0xFFFF, cpuz80_read_actual, NULL},
+  {-1, -1, NULL, NULL}
 };
 
 static struct MemoryWriteByte cpuz80_write[] = {
-  { 0x0000, 0xFFFF, cpuz80_write_actual, NULL },
-  { -1, -1, NULL, NULL }
+  {0x0000, 0xFFFF, cpuz80_write_actual, NULL},
+  {-1, -1, NULL, NULL}
 };
 
 static struct z80PortRead cpuz80_ioread[] = {
-  { 0x0000, 0x00FF, cpuz80_ioread_actual, NULL },
-  { -1, -1, NULL, NULL }
+  {0x0000, 0x00FF, cpuz80_ioread_actual, NULL},
+  {-1, -1, NULL, NULL}
 };
 
 static struct z80PortWrite cpuz80_iowrite[] = {
-  { 0x0000, 0x00FF, cpuz80_iowrite_actual, NULL },
-  { -1, -1, NULL, NULL }
+  {0x0000, 0x00FF, cpuz80_iowrite_actual, NULL},
+  {-1, -1, NULL, NULL}
 };
 
 UINT8 cpuz80_read_actual(UINT32 addr, struct MemoryReadByte *me)
@@ -116,21 +117,21 @@ void cpuz80_updatecontext(void)
 void cpuz80_resetcpu(void)
 {
   mz80reset();
-  cpuz80_resetting = 1; /* suspends execution */
+  cpuz80_resetting = 1;         /* suspends execution */
 }
 
 /*** cpuz80_unresetcpu - unreset z80 cpu ***/
 
 void cpuz80_unresetcpu(void)
 {
-  cpuz80_resetting = 0; /* un-suspends execution */
+  cpuz80_resetting = 0;         /* un-suspends execution */
 }
 
 /*** cpuz80_bankwrite - data is being written to latch ***/
 
 void cpuz80_bankwrite(uint8 data)
 {
-  cpuz80_bank  = (((cpuz80_bank >> 1) | ((data & 1) <<23)) & 0xff8000);
+  cpuz80_bank = (((cpuz80_bank >> 1) | ((data & 1) << 23)) & 0xff8000);
 }
 
 /*** cpuz80_stop - stop the processor ***/
@@ -161,15 +162,15 @@ void cpuz80_endfield(void)
 void cpuz80_sync(void)
 {
   int cpu68k_wanted = cpu68k_clocks - cpuz80_lastsync;
-  int wanted = (cpu68k_wanted<0?0:cpu68k_wanted)*7/15;
+  int wanted = (cpu68k_wanted < 0 ? 0 : cpu68k_wanted) * 7 / 15;
   int acheived;
 
-  if (cpuz80_active && !cpuz80_resetting) {
+  if (cpuz80_on && cpuz80_active && !cpuz80_resetting) {
     /* ui_log(LOG_USER, "executing %d z80 clocks @ %X", wanted,
        cpuz80_z80.z80pc); */
     mz80exec(wanted);
     acheived = mz80GetElapsedTicks(1);
-    cpuz80_lastsync = cpuz80_lastsync + acheived*15/7;
+    cpuz80_lastsync = cpuz80_lastsync + acheived * 15 / 7;
   } else {
     cpuz80_lastsync = cpu68k_clocks;
   }