diff -bBur acerhk-0.5.35-old/acerhk.c acerhk-0.5.35/acerhk.c
--- acerhk-0.5.35-old/acerhk.c  2007-02-10 17:46:23.000000000 +0200
+++ acerhk-0.5.35/acerhk.c      2007-04-28 19:18:49.000000000 +0300
@@ -550,6 +550,7 @@
  */
 static asmlinkage void call_bios_6xx(struct register_buffer *buf)
 {
+#ifndef __x86_64__
   if (bios_routine) {
       local_irq_disable();
        __asm__ __volatile__(
@@ -578,10 +579,12 @@
                                                 );
       local_irq_enable();
   }
+#endif
 }

 static asmlinkage void call_bios_52x(struct register_buffer *buf)
 {
+#ifndef __x86_64__
   if (bios_routine) {
       local_irq_disable();
        __asm__ __volatile__(
@@ -611,6 +614,7 @@
                                                 );
       local_irq_enable();
   }
+#endif
 }

 #define PRINT_BUFFER(x) \
@@ -783,7 +787,8 @@
   unsigned char c = 0;

   spin_lock_irqsave (&rtc_lock, flags);
-#ifndef DUMMYHW
+/* #ifndef DUMMYHW */
+#if !(defined(DUMMYHW) || defined(__x86_64__))
   if (cmos_index)
     c = CMOS_READ(cmos_index);
   else if (verbose > 3)
@@ -867,9 +872,9 @@

 static struct proc_dir_entry *proc_acer_dir;

-static unsigned int __init find_hk_area(void)
+static unsigned long __init find_hk_area(void)
 {
-  int offset, sig;
+  long offset, sig;
   unsigned int fkt;
   fkt = 0;
   sig = -1; /* offset to signature in io area */
@@ -887,9 +892,9 @@
     fkt = readl(reg1 + sig + 5);
     /* adjust fkt to address of mapped IO area */
     if (fkt >= 0xf0000)
-      fkt = (unsigned int)reg1 + fkt - 0xf0000;
+      fkt = (unsigned long)reg1 + fkt - 0xf0000;
     else if (fkt >= 0xe0000)
-      fkt = (unsigned int)reg1 + fkt - 0xe0000;
+      fkt = (unsigned long)reg1 + fkt - 0xe0000;
     else
       fkt = 0;
   }
@@ -1144,6 +1149,7 @@
   case 2000:
   case 2010:
   case 2020:
+  case 5100:
     /* Aspire 13xx series laptops use dritek hardware, no
        acerhk-mapping needed
        VolUp and VolDown are managed as normal keys
@@ -1458,6 +1464,7 @@
   case 1800:
   case 2010:
   case 2020:
+  case 5100:
     /* Dritek EC, bluetooth, wifi, mail */
     acerhk_type = TM_dritek;
     acerhk_model_features = TM_F_MAIL_LED_EC2 | TM_F_WLAN_EC2 | TM_F_BLUE_EC2;
@@ -1792,6 +1799,8 @@
           break;
         case '2': series = 5020; break;
         }
+      } else if (str[8] == '1' && str[9] == '0') {
+       series = 5100;
       } else {
         if (verbose > 1)
           printk(KERN_INFO"acerhk: model string indicates unknown Aspire 5xxx series\n");
@@ -2117,7 +2126,8 @@
 /* polling timer handler */
 static void acerhk_poll_event(unsigned long save_size)
 {
-#ifndef DUMMYHW
+/* #ifndef DUMMYHW */
+#if !(defined(DUMMYHW) || defined(__x86_64__))
   unsigned int max = MAX_POLLING_LOOPS;
   /* make sure not to loop more then 32 times */
   if (!max || max > 32)
@@ -2139,7 +2149,8 @@
 {
   if (acerhk_blueled_blinking != -1) {
     acerhk_blueled_blinking = !acerhk_blueled_blinking;
-#ifndef DUMMYHW
+/* #ifndef DUMMYHW */
+#if !(defined(DUMMYHW) || defined(__x86_64__))
     wbutton_fct_1(acerhk_blueled_blinking);
 #endif
     acerhk_timer_blinking.expires = jiffies + acerhk_blueled_blinking_delay;
@@ -2904,7 +2915,8 @@
     /* attach to input system */
     init_input();
     memset(acerhk_model_string, 0x00, ACERHK_MODEL_STRLEN);
-#ifdef DUMMYHW
+/* #ifdef DUMMYHW */
+#if !(defined(DUMMYHW) || defined(__x86_64__))
     acerhk_model_addr = (void*)0x12345678;
     /* copy the string, but not more than 15 characters */
     strncpy(acerhk_model_string, "TravelmateDummy", ACERHK_MODEL_STRLEN-1);