diff --git a/bootloader/mrobe500.c b/bootloader/mrobe500.c
index 57df653f10..86415cb560 100755
--- a/bootloader/mrobe500.c
+++ b/bootloader/mrobe500.c
@@ -99,7 +99,7 @@ void main(void)
         reset_screen();
         lcd_update();
     }
-
+#if 0
     int button=0, *address=0x0, count=0;
     while(true)
     {
@@ -118,7 +118,7 @@ void main(void)
         else if (button==BUTTON_RC_REW)
             address-=0x1000;
 
-   //     if ((inw(IO_GIO_BITSET0)&(1<<14)) == 0)
+   //     if ((IO_GIO_BITSET0&(1<<14) == 0)
         {
             short x,y,z1,z2, reg;
             tsc2100_read_values(&x, &y, &z1, &z2);
@@ -132,7 +132,7 @@ void main(void)
             line -= 6;
         }
     }
-
+#endif
     printf("ATA");
     rc = ata_init();
     if(rc)
diff --git a/firmware/target/arm/olympus/mrobe-500/ata-mr500.c b/firmware/target/arm/olympus/mrobe-500/ata-mr500.c
index d860240134..47a8c61a45 100644
--- a/firmware/target/arm/olympus/mrobe-500/ata-mr500.c
+++ b/firmware/target/arm/olympus/mrobe-500/ata-mr500.c
@@ -29,12 +29,12 @@
 #include "backlight-target.h"
 
 /* ARESET on C7C68300 and RESET on ATA interface (Active Low) */
-#define ATA_RESET_ENABLE return
-#define ATA_RESET_DISABLE return
+#define ATA_RESET_ENABLE  (IO_GIO_BITCLR0 = 1 << 10)
+#define ATA_RESET_DISABLE (IO_GIO_BITSET0 = 1 << 10)
 
 /* ATA_EN on C7C68300 */
-#define USB_ATA_ENABLE return
-#define USB_ATA_DISABLE return
+#define USB_ATA_ENABLE    (IO_GIO_BITSET0 = 1 << 2)
+#define USB_ATA_DISABLE   (IO_GIO_BITCLR0 = 1 << 2)
 
 void ata_reset(void)
 {
@@ -55,20 +55,17 @@ void ata_enable(bool on)
 
 bool ata_is_coldstart(void)
 {
-    return false;
+    return true;
 }
 
 void ata_device_init(void)
 {
     /* ATA reset */
     ATA_RESET_DISABLE; /* Set the pin to disable an active low reset */
-    
-    /* set GIO17 (ATA power) on and output */
-    IO_GIO_BITCLR1=(1<<1);
-	IO_GIO_DIR1&=~(1<<1);
+    IO_GIO_DIR0&=~(1<<10);
 }
 
-#if !defined(BOOTLOADER)
+#if 0
 void copy_read_sectors(unsigned char* buf, int wordcount)
 {
     __buttonlight_trigger();
diff --git a/firmware/target/arm/olympus/mrobe-500/ata-target.h b/firmware/target/arm/olympus/mrobe-500/ata-target.h
index f6b1a23b72..8b7dadf5e9 100644
--- a/firmware/target/arm/olympus/mrobe-500/ata-target.h
+++ b/firmware/target/arm/olympus/mrobe-500/ata-target.h
@@ -16,7 +16,7 @@
  * KIND, either express or implied.
  *
  ****************************************************************************/
- 
+
 #ifndef ATA_TARGET_H
 #define ATA_TARGET_H
 
@@ -29,15 +29,18 @@
 #endif
 
 #define ATA_IOBASE      0x50000000
-#define ATA_DATA        (*((volatile unsigned short*)(ATA_IOBASE+0xa0)))
-#define ATA_ERROR       (*((volatile unsigned char*)(ATA_IOBASE + 0xa2)))
-#define ATA_NSECTOR     (*((volatile unsigned char*)(ATA_IOBASE + 0x24)))
-#define ATA_SECTOR      (*((volatile unsigned char*)(ATA_IOBASE + 0x26)))
-#define ATA_LCYL        (*((volatile unsigned char*)(ATA_IOBASE + 0x28)))
-#define ATA_HCYL        (*((volatile unsigned char*)(ATA_IOBASE + 0x2A)))
-#define ATA_SELECT      (*((volatile unsigned char*)(ATA_IOBASE + 0x2C)))
-#define ATA_COMMAND     (*((volatile unsigned char*)(ATA_IOBASE + 0x2E)))
-#define ATA_CONTROL     (*((volatile unsigned char*)(ATA_IOBASE + 0x9C)))
+#define REGISTER_OFFSET 0x00400000 /* A21 = High */
+#define CONTROL_OFFSET  0x00800000 /* A22 = High */
+#define IDE_SHIFT 17
+#define ATA_DATA        (*((volatile unsigned short*)(REGISTER_OFFSET + (0x00 << IDE_SHIFT))))
+#define ATA_ERROR       (*((volatile unsigned char*)(REGISTER_OFFSET + (0x01 << IDE_SHIFT))))
+#define ATA_NSECTOR     (*((volatile unsigned char*)(REGISTER_OFFSET + (0x02 << IDE_SHIFT))))
+#define ATA_SECTOR      (*((volatile unsigned char*)(REGISTER_OFFSET + (0x03 << IDE_SHIFT))))
+#define ATA_LCYL        (*((volatile unsigned char*)(REGISTER_OFFSET + (0x04 << IDE_SHIFT))))
+#define ATA_HCYL        (*((volatile unsigned char*)(REGISTER_OFFSET + (0x05 << IDE_SHIFT))))
+#define ATA_SELECT      (*((volatile unsigned char*)(REGISTER_OFFSET + (0x06 << IDE_SHIFT))))
+#define ATA_COMMAND     (*((volatile unsigned char*)(REGISTER_OFFSET + (0x07 << IDE_SHIFT))))
+#define ATA_CONTROL     (*((volatile unsigned char*)(CONTROL_OFFSET  + (0x06 << IDE_SHIFT))))
 
 #define STATUS_BSY      0x80
 #define STATUS_RDY      0x40
diff --git a/firmware/target/arm/olympus/mrobe-500/power-mr500.c b/firmware/target/arm/olympus/mrobe-500/power-mr500.c
index 074f5b233a..3a6dad77f4 100644
--- a/firmware/target/arm/olympus/mrobe-500/power-mr500.c
+++ b/firmware/target/arm/olympus/mrobe-500/power-mr500.c
@@ -32,7 +32,9 @@
 void power_init(void)
 {
     /* Initialize IDE power pin */
+    /* set GIO17 (ATA power) on and output */
     ide_power_enable(true);
+    IO_GIO_DIR1&=~(1<<1);
     /* Charger detect */
 }
 
@@ -49,14 +51,14 @@ bool charging_state(void) {
 void ide_power_enable(bool on)
 {
     if (on)
-        return;
+        IO_GIO_BITCLR1=(1<<1);
     else
-        return;
+        IO_GIO_BITSET1=(1<<1);
 }
 
 bool ide_powered(void)
 {
-    return true;
+    return !(IO_GIO_BITSET1&(1<<1));
 }
 
 void power_off(void)
@@ -64,8 +66,8 @@ void power_off(void)
     /* turn off backlight and wait for 1 second */
     __backlight_off();
     sleep(HZ);
-    /* set SLEEP bit to on in CLKCON to turn off */
-//    CLKCON |=(1<<3);
+    /* Hard shutdown */
+    IO_GIO_BITSET1|=1<<10;
 }
 
 #else /* SIMULATOR */