diff --git a/hw/r2d.c b/hw/r2d.c
index a9aefa2..9b6fcba 100644
--- a/hw/r2d.c
+++ b/hw/r2d.c
@@ -250,7 +250,7 @@ static void r2d_init(ram_addr_t ram_size,
     memory_region_init_ram(sdram, NULL, "r2d.sdram", SDRAM_SIZE);
     memory_region_add_subregion(address_space_mem, SDRAM_BASE, sdram);
     /* Register peripherals */
-    s = sh7750_init(env);
+    s = sh7750_init(env, address_space_mem);
     irq = r2d_fpga_init(address_space_mem, 0x04000000, sh7750_irl(s));
     sysbus_create_varargs("sh_pci", 0x1e200000, irq[PCI_INTA], irq[PCI_INTB],
                           irq[PCI_INTC], irq[PCI_INTD], NULL);
diff --git a/hw/sh.h b/hw/sh.h
index d30e9f5..cf3f6f6 100644
--- a/hw/sh.h
+++ b/hw/sh.h
@@ -9,8 +9,9 @@
 
 /* sh7750.c */
 struct SH7750State;
+struct MemoryRegion;
 
-struct SH7750State *sh7750_init(CPUState * cpu);
+struct SH7750State *sh7750_init(CPUState * cpu, struct MemoryRegion *sysmem);
 
 typedef struct {
     /* The callback will be triggered if any of the designated lines change */
diff --git a/hw/sh7750.c b/hw/sh7750.c
index 9f3ea92..3bf568d 100644
--- a/hw/sh7750.c
+++ b/hw/sh7750.c
@@ -30,10 +30,18 @@
 #include "sh7750_regnames.h"
 #include "sh_intc.h"
 #include "cpu.h"
+#include "exec-memory.h"
 
 #define NB_DEVICES 4
 
 typedef struct SH7750State {
+    MemoryRegion iomem;
+    MemoryRegion iomem_1f0;
+    MemoryRegion iomem_ff0;
+    MemoryRegion iomem_1f8;
+    MemoryRegion iomem_ff8;
+    MemoryRegion iomem_1fc;
+    MemoryRegion iomem_ffc;
     /* CPU */
     CPUSH4State *cpu;
     /* Peripheral frequency in Hz */
@@ -436,16 +444,16 @@ static void sh7750_mem_writel(void *opaque, target_phys_addr_t addr,
     }
 }
 
-static CPUReadMemoryFunc * const sh7750_mem_read[] = {
-    sh7750_mem_readb,
-    sh7750_mem_readw,
-    sh7750_mem_readl
-};
-
-static CPUWriteMemoryFunc * const sh7750_mem_write[] = {
-    sh7750_mem_writeb,
-    sh7750_mem_writew,
-    sh7750_mem_writel
+static const MemoryRegionOps sh7750_mem_ops = {
+    .old_mmio = {
+        .read = {sh7750_mem_readb,
+                 sh7750_mem_readw,
+                 sh7750_mem_readl },
+        .write = {sh7750_mem_writeb,
+                  sh7750_mem_writew,
+                  sh7750_mem_writel },
+    },
+    .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
 /* sh775x interrupt controller tables for sh_intc.c
@@ -706,30 +714,40 @@ static CPUWriteMemoryFunc * const sh7750_mmct_write[] = {
     sh7750_mmct_writel
 };
 
-SH7750State *sh7750_init(CPUSH4State * cpu)
+SH7750State *sh7750_init(CPUSH4State * cpu, MemoryRegion *sysmem)
 {
     SH7750State *s;
-    int sh7750_io_memory;
     int sh7750_mm_cache_and_tlb; /* memory mapped cache and tlb */
 
     s = g_malloc0(sizeof(SH7750State));
     s->cpu = cpu;
     s->periph_freq = 60000000;	/* 60MHz */
-    sh7750_io_memory = cpu_register_io_memory(sh7750_mem_read,
-					      sh7750_mem_write, s,
-                                              DEVICE_NATIVE_ENDIAN);
-    cpu_register_physical_memory_offset(0x1f000000, 0x1000,
-                                        sh7750_io_memory, 0x1f000000);
-    cpu_register_physical_memory_offset(0xff000000, 0x1000,
-                                        sh7750_io_memory, 0x1f000000);
-    cpu_register_physical_memory_offset(0x1f800000, 0x1000,
-                                        sh7750_io_memory, 0x1f800000);
-    cpu_register_physical_memory_offset(0xff800000, 0x1000,
-                                        sh7750_io_memory, 0x1f800000);
-    cpu_register_physical_memory_offset(0x1fc00000, 0x1000,
-                                        sh7750_io_memory, 0x1fc00000);
-    cpu_register_physical_memory_offset(0xffc00000, 0x1000,
-                                        sh7750_io_memory, 0x1fc00000);
+    memory_region_init_io(&s->iomem, &sh7750_mem_ops, s,
+                          "memory", 0x1fc01000);
+
+    memory_region_init_alias(&s->iomem_1f0, "memory-1f0",
+                             &s->iomem, 0x1f000000, 0x1000);
+    memory_region_add_subregion(sysmem, 0x1f000000, &s->iomem_1f0);
+
+    memory_region_init_alias(&s->iomem_ff0, "memory-ff0",
+                             &s->iomem, 0x1f000000, 0x1000);
+    memory_region_add_subregion(sysmem, 0xff000000, &s->iomem_ff0);
+
+    memory_region_init_alias(&s->iomem_1f8, "memory-1f8",
+                             &s->iomem, 0x1f800000, 0x1000);
+    memory_region_add_subregion(sysmem, 0x1f800000, &s->iomem_1f8);
+
+    memory_region_init_alias(&s->iomem_ff8, "memory-ff8",
+                             &s->iomem, 0x1f800000, 0x1000);
+    memory_region_add_subregion(sysmem, 0xff800000, &s->iomem_ff8);
+
+    memory_region_init_alias(&s->iomem_1fc, "memory-1fc",
+                             &s->iomem, 0x1fc00000, 0x1000);
+    memory_region_add_subregion(sysmem, 0x1fc00000, &s->iomem_1fc);
+
+    memory_region_init_alias(&s->iomem_ffc, "memory-ffc",
+                             &s->iomem, 0x1fc00000, 0x1000);
+    memory_region_add_subregion(sysmem, 0xffc00000, &s->iomem_ffc);
 
     sh7750_mm_cache_and_tlb = cpu_register_io_memory(sh7750_mmct_read,
 						     sh7750_mmct_write, s,
diff --git a/hw/shix.c b/hw/shix.c
index 670ddb5..e0c2200 100644
--- a/hw/shix.c
+++ b/hw/shix.c
@@ -80,7 +80,7 @@ static void shix_init(ram_addr_t ram_size,
     }
 
     /* Register peripherals */
-    s = sh7750_init(env);
+    s = sh7750_init(env, sysmem);
     /* XXXXX Check success */
     tc58128_init(s, "shix_linux_nand.bin", NULL);
     fprintf(stderr, "initialization terminated\n");
