diff --git a/firmware/crt0.S b/firmware/crt0.S
index ee8beb7f2f..887f7de1f9 100644
--- a/firmware/crt0.S
+++ b/firmware/crt0.S
@@ -190,8 +190,8 @@ irq_handler:
         
         /* Set up the DRAM controller. The refresh is based on the 11.2896MHz
            clock (5.6448MHz bus frequency). We haven't yet started the PLL */
-        move.l #0x80010000,%d0
-        move.l %d0,(0x100,%a0) /* DCR - Synchronous, 32 cycle refresh */
+        move.w #0x8001,%d0
+        move.w %d0,(0x100,%a0) /* DCR - Synchronous, 32 cycle refresh */
 
         /* Note: we place the SDRAM on an 0x1000000 (16M) offset because
            the 5249 BGA chip has a fault which disables the use of A24. The
diff --git a/firmware/export/mcf5249.h b/firmware/export/mcf5249.h
index d4ed2849ce..398b31156d 100644
--- a/firmware/export/mcf5249.h
+++ b/firmware/export/mcf5249.h
@@ -44,7 +44,7 @@
 #define CSMR3 (*(volatile unsigned long *)(MBAR + 0x0a8))
 #define CSCR3 (*(volatile unsigned long *)(MBAR + 0x0ac))
 
-#define DCR   (*(volatile unsigned long *)(MBAR + 0x100))
+#define DCR   (*(volatile unsigned short *)(MBAR + 0x100))
 #define DACR0 (*(volatile unsigned long *)(MBAR + 0x108))
 #define DMR0  (*(volatile unsigned long *)(MBAR + 0x10c))
 #define DACR1 (*(volatile unsigned long *)(MBAR + 0x110))
diff --git a/firmware/system.c b/firmware/system.c
index be6be1dfaa..d095e1574a 100644
--- a/firmware/system.c
+++ b/firmware/system.c
@@ -480,7 +480,7 @@ void set_cpu_frequency(long frequency)
     switch(frequency)
     {
     case CPUFREQ_MAX:
-        DCR = (DCR & ~0x000001ff) | 1;   /* Refresh timer for bypass
+        DCR = (DCR & ~0x01ff) | 1;   /* Refresh timer for bypass
                                             frequency */
         PLLCR &= ~1;  /* Bypass mode */
         PLLCR = 0x11853005;
@@ -488,7 +488,7 @@ void set_cpu_frequency(long frequency)
         CSCR1 = 0x00002580; /* LCD: 9 wait states */
         while(!(PLLCR & 0x80000000)) {}; /* Wait until the PLL has locked.
                                             This may take up to 10ms! */
-        DCR = (DCR & ~0x000001ff) | 28;   /* Refresh timer */
+        DCR = (DCR & ~0x01ff) | 28;   /* Refresh timer */
         cpu_frequency = CPUFREQ_MAX;
         tick_start(1000/HZ);
         IDECONFIG1 = 0x106000 | (5 << 10); /* BUFEN2 enable + CS2Pre/CS2Post */
@@ -499,7 +499,7 @@ void set_cpu_frequency(long frequency)
         break;
         
     case CPUFREQ_NORMAL:
-        DCR = (DCR & ~0x000001ff) | 1;   /* Refresh timer for bypass
+        DCR = (DCR & ~0x01ff) | 1;   /* Refresh timer for bypass
                                             frequency */
         PLLCR &= ~1;  /* Bypass mode */
         PLLCR = 0x10886001;
@@ -507,7 +507,7 @@ void set_cpu_frequency(long frequency)
         CSCR1 = 0x00000980; /* LCD: 2 wait states */
         while(!(PLLCR & 0x80000000)) {}; /* Wait until the PLL has locked.
                                             This may take up to 10ms! */
-        DCR = (DCR & ~0x000001ff) | 10;   /* Refresh timer */
+        DCR = (DCR & ~0x01ff) | 10;   /* Refresh timer */
         cpu_frequency = CPUFREQ_NORMAL;
         tick_start(1000/HZ);
         IDECONFIG1 = 0x106000 | (5 << 10); /* BUFEN2 enable + CS2Pre/CS2Post */
@@ -517,7 +517,7 @@ void set_cpu_frequency(long frequency)
         MFDR2 = 0x13;
         break;
     default:
-        DCR = (DCR & ~0x000001ff) | 1;   /* Refresh timer for bypass
+        DCR = (DCR & ~0x01ff) | 1;   /* Refresh timer for bypass
                                             frequency */
         PLLCR = 0x00000000;  /* Bypass mode */
         CSCR0 = 0x00000180; /* Flash: 0 wait states */