Add missing files from last commit.

src/device.c

@@ -0,0 +1,59 @@
+#include "ibm.h"
+#include "device.h"
+
+static void *device_priv[256];
+static device_t *devices[256];
+
+void device_init()
+{
+        memset(devices, 0, sizeof(devices));
+}
+
+void device_add(device_t *d)
+{
+        int c = 0;
+        void *priv;
+        
+        while (devices[c] != NULL && c < 256)
+                c++;
+        
+        if (c >= 256)
+                fatal("device_add : too many devices\n");
+        
+        priv = d->init();
+        if (priv == NULL)
+                fatal("device_add : device init failed\n");
+        
+        devices[c] = d;
+        device_priv[c] = priv;        
+}
+
+void device_close_all()
+{
+        int c;
+        
+        for (c = 0; c < 256; c++)
+        {
+                if (devices[c] != NULL)
+                {
+                        devices[c]->close(device_priv[c]);
+                        devices[c] = device_priv[c] = NULL;
+                }
+        }
+}
+
+void device_speed_changed()
+{
+        int c;
+        
+        for (c = 0; c < 256; c++)
+        {
+                if (devices[c] != NULL)
+                {
+                        if (devices[c]->speed_changed != NULL)
+                        {
+                                devices[c]->speed_changed(device_priv[c]);
+                        }
+                }
+        }
+}