diff --git a/jtag/ChangeLog b/jtag/ChangeLog
index e84df27f..295d2560 100644
--- a/jtag/ChangeLog
+++ b/jtag/ChangeLog
@@ -1,3 +1,9 @@
+2008-01-25  Kolja Waschk <kawk>
+
+    * include/jim.h, src/jim/tap.c, intel_28f800b3.c, Makefile.am,
+      some_cpu.c: Code skeleton and alloc/free calls for actual parts
+	  connected to JIM's some_cpu
+
 2008-01-24  Kolja Waschk <kawk>
 
     * tap/cable/ft2232.c, tap/parport/ftdi.c, tap/cable.c: added support
diff --git a/jtag/include/jim.h b/jtag/include/jim.h
index 8257c823..d8941769 100644
--- a/jtag/include/jim.h
+++ b/jtag/include/jim.h
@@ -71,6 +71,7 @@ typedef struct jim_device
   void (*tck_rise)(struct jim_device *dev, int tms, int tdi);
   void (*tck_fall)(struct jim_device *dev);
   void (*dev_free)(struct jim_device *dev);
+  void *state;
   int num_sregs;
   int current_dr;
   shift_reg_t *sreg;
@@ -86,6 +87,24 @@ typedef struct jim_state
 }
 jim_state_t;
 
+typedef struct jim_bus_device
+{
+    int width; /* bits */
+    uint32_t size; /* bytes */
+	void *state; /* device-dependent */
+    void (*init)(struct jim_bus_device *x);
+    void (*access)(struct jim_bus_device *x,
+				uint32_t address, uint32_t data, uint32_t control);
+	void (*free)(struct jim_bus_device *x);
+}
+jim_bus_device_t;
+
+typedef struct
+{
+    uint32_t offset;
+	jim_bus_device_t *part;
+}
+jim_attached_part_t;
 
 void jim_set_trst(jim_state_t *s, int trst);
 int jim_get_trst(jim_state_t *s);
diff --git a/jtag/src/jim/Makefile.am b/jtag/src/jim/Makefile.am
index 60bbeba6..f38124a7 100644
--- a/jtag/src/jim/Makefile.am
+++ b/jtag/src/jim/Makefile.am
@@ -27,4 +27,5 @@ noinst_LIBRARIES = libjim.a
 
 libjim_a_SOURCES = \
 	tap.c \
-	some_cpu.c
+	some_cpu.c \
+	intel_28f800b3.c
diff --git a/jtag/src/jim/intel_28f800b3.c b/jtag/src/jim/intel_28f800b3.c
new file mode 100644
index 00000000..3301e2b4
--- /dev/null
+++ b/jtag/src/jim/intel_28f800b3.c
@@ -0,0 +1,27 @@
+#include <jim.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+void intel_28f800b3_init(jim_bus_device_t *d)
+{
+}
+
+void intel_28f800b3_free(jim_bus_device_t *d)
+{
+}
+
+void intel_28f800b3_access(jim_bus_device_t *d,
+    uint32_t address, uint32_t data, uint32_t control)
+{
+}
+
+jim_bus_device_t intel_28f800b3 =
+{
+    16, /* width [bits] */
+    0x800, /* size [bytes] */
+    NULL,  /* state */
+    intel_28f800b3_init,  /* init() */
+    intel_28f800b3_access,  /* access() */
+    intel_28f800b3_free  /* free() */
+};
+
diff --git a/jtag/src/jim/some_cpu.c b/jtag/src/jim/some_cpu.c
index 038b9ea3..513b10f5 100644
--- a/jtag/src/jim/some_cpu.c
+++ b/jtag/src/jim/some_cpu.c
@@ -23,8 +23,18 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <jim.h>
 
+extern jim_bus_device_t intel_28f800b3;
+
+jim_attached_part_t some_cpu_attached[] =
+{
+    { 0x00000000, &intel_28f800b3 },
+    { 0xFFFFFFFF, NULL }
+};
+
 #define BSR_LEN 202
 
 void some_cpu_report_idcode(jim_device_t *dev)
@@ -34,10 +44,28 @@ void some_cpu_report_idcode(jim_device_t *dev)
   dev->current_dr = 1; /* IDR */
 }
 
-void some_cpu_tck_rise(jim_device_t *dev, int tms, int tdi)
+void some_cpu_extest(char *st, jim_device_t *dev)
 {
   int i;
 
+  printf("EXTEST/%s with A=%08X, D=%08X%s%s%s\n", st,
+    dev->sreg[2].reg[0], dev->sreg[2].reg[1],
+    (dev->sreg[2].reg[2] & 1) ? ", OE":"",
+    (dev->sreg[2].reg[2] & 2) ? ", WE":"",
+    (dev->sreg[2].reg[2] & 4) ? ", CS":"");
+
+  for(i=0; some_cpu_attached[i].part; i++)
+  {
+    jim_bus_device_t *b = ((jim_attached_part_t*)(dev->state))[i].part;
+
+    b->access(b, dev->sreg[2].reg[0],
+                 dev->sreg[2].reg[1],
+                 dev->sreg[2].reg[2]);
+  }
+}
+
+void some_cpu_tck_rise(jim_device_t *dev, int tms, int tdi)
+{
   // jim_print_tap_state(dev);
 
   switch(dev->tap_state)
@@ -49,12 +77,7 @@ void some_cpu_tck_rise(jim_device_t *dev, int tms, int tdi)
     case UPDATE_DR:
       if(dev->current_dr == 2)
       {
-        printf("UPDATE_DR(BSR): A=%08X, D=%08X%s%s%s\n",
-          dev->sreg[2].reg[0],
-          dev->sreg[2].reg[1],
-          (dev->sreg[2].reg[2] & 1) ? ", OE":"",
-          (dev->sreg[2].reg[2] & 2) ? ", WE":"",
-          (dev->sreg[2].reg[2] & 4) ? ", CS":"");
+        if(dev->sreg[0].reg[0] == 0) some_cpu_extest("UPDATE_DR", dev);
       };
       break;
  
@@ -64,6 +87,7 @@ void some_cpu_tck_rise(jim_device_t *dev, int tms, int tdi)
         case 0x0: /* EXTEST */
           printf("EXTEST\n");
           dev->current_dr = 2;
+          some_cpu_extest("UPDATE_IR", dev);
           break;
         case 0x1: /* IDCODE */
           printf("IDCODE\n");
@@ -86,6 +110,21 @@ void some_cpu_tck_rise(jim_device_t *dev, int tms, int tdi)
   }
 }
 
+void some_cpu_free(jim_device_t *dev)
+{
+  int i;
+
+  if(!dev) return;
+  if(!dev->state) return;
+
+  for(i=0;some_cpu_attached[i].part;i++)
+  { 
+    jim_bus_device_t *b = ((jim_attached_part_t*)(dev->state))[i].part;
+    if(b->free != NULL) b->free(b);
+  }
+  free(dev->state);
+}
+
 jim_device_t *some_cpu(void)
 {
   jim_device_t *dev;
@@ -95,7 +134,24 @@ jim_device_t *some_cpu(void)
 
   if(dev)
   {
-    dev->tck_rise = some_cpu_tck_rise;
+    dev->state    = malloc(sizeof(some_cpu_attached));
+    if(!dev->state)
+    {
+      free(dev);
+      dev = NULL;
+    }
+    else
+    {
+      int i;
+      dev->tck_rise = some_cpu_tck_rise;
+      dev->dev_free = some_cpu_free;
+      memcpy(dev->state, some_cpu_attached, sizeof(some_cpu_attached));
+      for(i=0;some_cpu_attached[i].part;i++)
+      {
+        jim_bus_device_t *b = ((jim_attached_part_t*)(dev->state))[i].part;
+        b->init(b);
+      }
+    }
   }
 
   return dev;
diff --git a/jtag/src/jim/tap.c b/jtag/src/jim/tap.c
index d8271fda..97e0135f 100644
--- a/jtag/src/jim/tap.c
+++ b/jtag/src/jim/tap.c
@@ -248,6 +248,7 @@ jim_state_t *jim_init(void)
 
   s->trst = 0;
   s->last_device_in_chain = some_cpu();
+
   if(s->last_device_in_chain != NULL)
   {
     s->last_device_in_chain->prev = NULL;