diff --git a/I7000/i701_cpu.c b/I7000/i701_cpu.c
index b075dd0..2290e67 100644
--- a/I7000/i701_cpu.c
+++ b/I7000/i701_cpu.c
@@ -764,6 +764,9 @@ store:
 t_stat
 cpu_reset(DEVICE * dptr)
 {
+    extern void sys_init(void);
+
+    sys_init();
     AC = 0;
     MQ = 0;
     dualcore = 0;
diff --git a/I7000/i701_sys.c b/I7000/i701_sys.c
index 1c75b57..acdfe48 100644
--- a/I7000/i701_sys.c
+++ b/I7000/i701_sys.c
@@ -301,8 +301,6 @@ void sys_init(void) {
         sim_vm_parse_addr = &parse_addr;
 }
 
-void (*sim_vm_init) (void) = &sys_init;
-
 /* Symbolic decode
 
    Inputs:
diff --git a/I7000/i7070_cpu.c b/I7000/i7070_cpu.c
index 654de0c..2ae5114 100644
--- a/I7000/i7070_cpu.c
+++ b/I7000/i7070_cpu.c
@@ -132,7 +132,6 @@ int                 cycle_time = 20;            /* Cycle time of 12us */
 int32               hst_p = 0;                  /* History pointer */
 int32               hst_lnt = 0;                /* History length */
 struct InstHistory *hst = NULL;                 /* History stack */
-void (*sim_vm_init) (void) = &mem_init;
 
 
 /* CPU data structures
@@ -2775,6 +2774,12 @@ mem_init() {
 t_stat
 cpu_reset(DEVICE * dptr)
 {
+    static int  initialized = 0;
+
+    if (initialized == 0) {
+        initialized = 1;
+        mem_init();
+    }
 
     AC[1] = PSIGN;
     AC[2] = PSIGN;
diff --git a/I7000/i7080_cpu.c b/I7000/i7080_cpu.c
index 50d82bc..f32b1cc 100644
--- a/I7000/i7080_cpu.c
+++ b/I7000/i7080_cpu.c
@@ -231,7 +231,6 @@ int32               hst_lnt = 0;                /* History length */
 struct InstHistory *hst = NULL;                 /* History stack */
 extern uint32       drum_addr;
 extern UNIT         chan_unit[];
-void (*sim_vm_init) (void) = &mem_init;
 
 
 /* CPU data structures
@@ -3174,6 +3173,12 @@ cpu_reset(DEVICE * dptr)
 {
     int                 i;
     int                 n,p,h;
+    static int          initialized;
+
+    if (initialized == 0) {
+        initialized = 1;
+        mem_init();
+    }
 
     /* Set next and previous address arrays based on CPU type */
     if (CPU_MODEL == CPU_702) {