--- generator/main/cpuz80-mz80.c	2020/03/04 04:46:53	1.1.1.2
+++ generator/main/cpuz80-mz80.c	2020/03/04 04:47:22	1.1.1.4
@@ -18,13 +18,14 @@ 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},
@@ -162,14 +163,14 @@ void cpuz80_sync(void)
 {
   int cpu68k_wanted = cpu68k_clocks - cpuz80_lastsync;
   int wanted = (cpu68k_wanted < 0 ? 0 : cpu68k_wanted) * 7 / 15;
-  int acheived;
+  int achieved;
 
-  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;
+    achieved = mz80GetElapsedTicks(1);
+    cpuz80_lastsync = cpuz80_lastsync + achieved * 15 / 7;
   } else {
     cpuz80_lastsync = cpu68k_clocks;
   }