diff --git a/hw/cuda.c b/hw/cuda.c
index bbd1fda..26c96cc 100644
--- a/hw/cuda.c
+++ b/hw/cuda.c
@@ -108,48 +108,6 @@
 /* CUDA returns time_t's offset from Jan 1, 1904, not 1970 */
 #define RTC_OFFSET                      2082844800
 
-typedef struct CUDATimer {
-    int index;
-    uint16_t latch;
-    uint16_t counter_value; /* counter value at load time */
-    int64_t load_time;
-    int64_t next_irq_time;
-    QEMUTimer *timer;
-} CUDATimer;
-
-typedef struct CUDAState {
-    MemoryRegion mem;
-    /* cuda registers */
-    uint8_t b;      /* B-side data */
-    uint8_t a;      /* A-side data */
-    uint8_t dirb;   /* B-side direction (1=output) */
-    uint8_t dira;   /* A-side direction (1=output) */
-    uint8_t sr;     /* Shift register */
-    uint8_t acr;    /* Auxiliary control register */
-    uint8_t pcr;    /* Peripheral control register */
-    uint8_t ifr;    /* Interrupt flag register */
-    uint8_t ier;    /* Interrupt enable register */
-    uint8_t anh;    /* A-side data, no handshake */
-
-    CUDATimer timers[2];
-
-    uint32_t tick_offset;
-
-    uint8_t last_b; /* last value of B register */
-    uint8_t last_acr; /* last value of B register */
-
-    int data_in_size;
-    int data_in_index;
-    int data_out_index;
-
-    qemu_irq irq;
-    uint8_t autopoll;
-    uint8_t data_in[128];
-    uint8_t data_out[16];
-    QEMUTimer *adb_poll_timer;
-} CUDAState;
-
-static CUDAState cuda_state;
 ADBBusState adb_bus;
 
 static void cuda_update(CUDAState *s);
@@ -701,9 +659,9 @@ static const VMStateDescription vmstate_cuda = {
     }
 };
 
-static void cuda_reset(void *opaque)
+static void cuda_reset(DeviceState *dev)
 {
-    CUDAState *s = opaque;
+    CUDAState *s = CUDA(dev);
 
     s->b = 0;
     s->a = 0;
@@ -728,25 +686,57 @@ static void cuda_reset(void *opaque)
     set_counter(s, &s->timers[1], 0xffff);
 }
 
-void cuda_init (MemoryRegion **cuda_mem, qemu_irq irq)
+static int cuda_initfn(SysBusDevice *d)
 {
+    CUDAState *s = CUDA(d);
     struct tm tm;
-    CUDAState *s = &cuda_state;
-
-    s->irq = irq;
 
-    s->timers[0].index = 0;
     s->timers[0].timer = qemu_new_timer_ns(vm_clock, cuda_timer1, s);
 
-    s->timers[1].index = 1;
-
     qemu_get_timedate(&tm, 0);
     s->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET;
 
     s->adb_poll_timer = qemu_new_timer_ns(vm_clock, cuda_adb_poll, s);
+
+    return 0;
+}
+
+static void cuda_init(Object *obj)
+{
+    SysBusDevice *d = SYS_BUS_DEVICE(obj);
+    CUDAState *s = CUDA(obj);
+    int i;
+
     memory_region_init_io(&s->mem, &cuda_ops, s, "cuda", 0x2000);
+    sysbus_init_mmio(d, &s->mem);
+    sysbus_init_irq(d, &s->irq);
+
+    for (i = 0; i < 2; i++) {
+        s->timers[i].index = i;
+    }
+}
+
+static void cuda_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+    SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(oc);
+
+    sdc->init = cuda_initfn;
+    dc->reset = cuda_reset;
+    dc->vmsd = &vmstate_cuda;
+}
+
+static const TypeInfo cuda_type_info = {
+    .name = TYPE_CUDA,
+    .parent = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(CUDAState),
+    .instance_init = cuda_init,
+    .class_init = cuda_class_init,
+};
 
-    *cuda_mem = &s->mem;
-    vmstate_register(NULL, -1, &vmstate_cuda, s);
-    qemu_register_reset(cuda_reset, s);
+static void cuda_register_types(void)
+{
+    type_register_static(&cuda_type_info);
 }
+
+type_init(cuda_register_types)
diff --git a/hw/macio.c b/hw/macio.c
index 36c00e3..74bdcd1 100644
--- a/hw/macio.c
+++ b/hw/macio.c
@@ -38,9 +38,9 @@ typedef struct MacIOState
     /*< public >*/
 
     MemoryRegion bar;
+    CUDAState cuda;
     void *dbdma;
     MemoryRegion *pic_mem;
-    MemoryRegion *cuda_mem;
     MemoryRegion *escc_mem;
 } MacIOState;
 
@@ -52,7 +52,7 @@ typedef struct OldWorldMacIOState {
     MacIOState parent_obj;
     /*< public >*/
 
-    qemu_irq irqs[2];
+    qemu_irq irqs[3];
 
     MacIONVRAMState nvram;
     MACIOIDEState ide;
@@ -65,7 +65,7 @@ typedef struct NewWorldMacIOState {
     /*< private >*/
     MacIOState parent_obj;
     /*< public >*/
-    qemu_irq irqs[4];
+    qemu_irq irqs[5];
     MACIOIDEState ide[2];
 } NewWorldMacIOState;
 
@@ -76,17 +76,24 @@ static void macio_bar_setup(MacIOState *macio_state)
     if (macio_state->escc_mem) {
         memory_region_add_subregion(bar, 0x13000, macio_state->escc_mem);
     }
-    if (macio_state->cuda_mem) {
-        memory_region_add_subregion(bar, 0x16000, macio_state->cuda_mem);
-    }
 }
 
 static int macio_common_initfn(PCIDevice *d)
 {
     MacIOState *s = MACIO(d);
+    SysBusDevice *sysbus_dev;
+    int ret;
 
     d->config[0x3d] = 0x01; // interrupt on pin 1
 
+    ret = qdev_init(DEVICE(&s->cuda));
+    if (ret < 0) {
+        return ret;
+    }
+    sysbus_dev = SYS_BUS_DEVICE(&s->cuda);
+    memory_region_add_subregion(&s->bar, 0x16000,
+                                sysbus_mmio_get_region(sysbus_dev, 0));
+
     macio_bar_setup(s);
     pci_register_bar(d, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar);
 
@@ -103,6 +110,9 @@ static int macio_oldworld_initfn(PCIDevice *d)
         return ret;
     }
 
+    sysbus_dev = SYS_BUS_DEVICE(&s->cuda);
+    sysbus_connect_irq(sysbus_dev, 0, os->irqs[0]);
+
     ret = qdev_init(DEVICE(&os->nvram));
     if (ret < 0) {
         return ret;
@@ -118,8 +128,8 @@ static int macio_oldworld_initfn(PCIDevice *d)
     }
 
     sysbus_dev = SYS_BUS_DEVICE(&os->ide);
-    sysbus_connect_irq(sysbus_dev, 0, os->irqs[0]);
-    sysbus_connect_irq(sysbus_dev, 1, os->irqs[1]);
+    sysbus_connect_irq(sysbus_dev, 0, os->irqs[1]);
+    sysbus_connect_irq(sysbus_dev, 1, os->irqs[2]);
     macio_ide_register_dma(&os->ide, s->dbdma, 0x16);
     ret = qdev_init(DEVICE(&os->ide));
     if (ret < 0) {
@@ -158,14 +168,17 @@ static int macio_newworld_initfn(PCIDevice *d)
         return ret;
     }
 
+    sysbus_dev = SYS_BUS_DEVICE(&s->cuda);
+    sysbus_connect_irq(sysbus_dev, 0, ns->irqs[0]);
+
     if (s->pic_mem) {
         /* OpenPIC */
         memory_region_add_subregion(&s->bar, 0x40000, s->pic_mem);
     }
 
     sysbus_dev = SYS_BUS_DEVICE(&ns->ide[0]);
-    sysbus_connect_irq(sysbus_dev, 0, ns->irqs[0]);
-    sysbus_connect_irq(sysbus_dev, 1, ns->irqs[1]);
+    sysbus_connect_irq(sysbus_dev, 0, ns->irqs[1]);
+    sysbus_connect_irq(sysbus_dev, 1, ns->irqs[2]);
     macio_ide_register_dma(&ns->ide[0], s->dbdma, 0x16);
     ret = qdev_init(DEVICE(&ns->ide[0]));
     if (ret < 0) {
@@ -173,8 +186,8 @@ static int macio_newworld_initfn(PCIDevice *d)
     }
 
     sysbus_dev = SYS_BUS_DEVICE(&ns->ide[1]);
-    sysbus_connect_irq(sysbus_dev, 0, ns->irqs[2]);
-    sysbus_connect_irq(sysbus_dev, 1, ns->irqs[3]);
+    sysbus_connect_irq(sysbus_dev, 0, ns->irqs[3]);
+    sysbus_connect_irq(sysbus_dev, 1, ns->irqs[4]);
     macio_ide_register_dma(&ns->ide[0], s->dbdma, 0x1a);
     ret = qdev_init(DEVICE(&ns->ide[1]));
     if (ret < 0) {
@@ -211,6 +224,10 @@ static void macio_instance_init(Object *obj)
 
     memory_region_init(&s->bar, "macio", 0x80000);
 
+    object_initialize(&s->cuda, TYPE_CUDA);
+    qdev_set_parent_bus(DEVICE(&s->cuda), sysbus_get_default());
+    object_property_add_child(obj, "cuda", OBJECT(&s->cuda), NULL);
+
     s->dbdma = DBDMA_init(&dbdma_mem);
     memory_region_add_subregion(&s->bar, 0x08000, dbdma_mem);
 }
@@ -275,13 +292,11 @@ type_init(macio_register_types)
 
 void macio_init(PCIDevice *d,
                 MemoryRegion *pic_mem,
-                MemoryRegion *cuda_mem,
                 MemoryRegion *escc_mem)
 {
     MacIOState *macio_state = MACIO(d);
 
     macio_state->pic_mem = pic_mem;
-    macio_state->cuda_mem = cuda_mem;
     macio_state->escc_mem = escc_mem;
     /* Note: this code is strongly inspirated from the corresponding code
        in PearPC */
diff --git a/hw/ppc/mac.h b/hw/ppc/mac.h
index 3e390d3..26cb497 100644
--- a/hw/ppc/mac.h
+++ b/hw/ppc/mac.h
@@ -44,7 +44,72 @@
 #define ESCC_CLOCK 3686400
 
 /* Cuda */
-void cuda_init (MemoryRegion **cuda_mem, qemu_irq irq);
+#define TYPE_CUDA "cuda"
+#define CUDA(obj) OBJECT_CHECK(CUDAState, (obj), TYPE_CUDA)
+
+/**
+ * CUDATimer:
+ * @counter_value: counter value at load time
+ */
+typedef struct CUDATimer {
+    int index;
+    uint16_t latch;
+    uint16_t counter_value;
+    int64_t load_time;
+    int64_t next_irq_time;
+    QEMUTimer *timer;
+} CUDATimer;
+
+/**
+ * CUDAState:
+ * @b: B-side data
+ * @a: A-side data
+ * @dirb: B-side direction (1=output)
+ * @dira: A-side direction (1=output)
+ * @sr: Shift register
+ * @acr: Auxiliary control register
+ * @pcr: Peripheral control register
+ * @ifr: Interrupt flag register
+ * @ier: Interrupt enable register
+ * @anh: A-side data, no handshake
+ * @last_b: last value of B register
+ * @last_acr: last value of ACR register
+ */
+typedef struct CUDAState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+    /*< public >*/
+
+    MemoryRegion mem;
+    /* cuda registers */
+    uint8_t b;
+    uint8_t a;
+    uint8_t dirb;
+    uint8_t dira;
+    uint8_t sr;
+    uint8_t acr;
+    uint8_t pcr;
+    uint8_t ifr;
+    uint8_t ier;
+    uint8_t anh;
+
+    CUDATimer timers[2];
+
+    uint32_t tick_offset;
+
+    uint8_t last_b;
+    uint8_t last_acr;
+
+    int data_in_size;
+    int data_in_index;
+    int data_out_index;
+
+    qemu_irq irq;
+    uint8_t autopoll;
+    uint8_t data_in[128];
+    uint8_t data_out[16];
+    QEMUTimer *adb_poll_timer;
+} CUDAState;
 
 /* MacIO */
 #define TYPE_OLDWORLD_MACIO "macio-oldworld"
@@ -71,7 +136,6 @@ void macio_ide_register_dma(MACIOIDEState *ide, void *dbdma, int channel);
 
 void macio_init(PCIDevice *dev,
                 MemoryRegion *pic_mem,
-                MemoryRegion *cuda_mem,
                 MemoryRegion *escc_mem);
 
 /* Heathrow PIC */
diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index 9a91c91..1ba1c0b 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -151,7 +151,7 @@ static void ppc_core99_init(QEMUMachineInitArgs *args)
     MACIOIDEState *macio_ide;
     MacIONVRAMState *nvr;
     int bios_size;
-    MemoryRegion *pic_mem, *cuda_mem, *escc_mem;
+    MemoryRegion *pic_mem, *escc_mem;
     MemoryRegion *escc_bar = g_new(MemoryRegion, 1);
     int ppc_boot_device;
     DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
@@ -363,18 +363,14 @@ static void ppc_core99_init(QEMUMachineInitArgs *args)
 
     ide_drive_get(hd, MAX_IDE_BUS);
 
-    cuda_init(&cuda_mem, pic[0x19]);
-
-    adb_kbd_init(&adb_bus);
-    adb_mouse_init(&adb_bus);
-
     macio = pci_create(pci_bus, -1, TYPE_NEWWORLD_MACIO);
     dev = DEVICE(macio);
-    qdev_connect_gpio_out(dev, 0, pic[0x0d]); /* IDE */
-    qdev_connect_gpio_out(dev, 1, pic[0x02]); /* IDE DMA */
-    qdev_connect_gpio_out(dev, 2, pic[0x0e]); /* IDE */
-    qdev_connect_gpio_out(dev, 3, pic[0x02]); /* IDE DMA */
-    macio_init(macio, pic_mem, cuda_mem, escc_bar);
+    qdev_connect_gpio_out(dev, 0, pic[0x19]); /* CUDA */
+    qdev_connect_gpio_out(dev, 1, pic[0x0d]); /* IDE */
+    qdev_connect_gpio_out(dev, 2, pic[0x02]); /* IDE DMA */
+    qdev_connect_gpio_out(dev, 3, pic[0x0e]); /* IDE */
+    qdev_connect_gpio_out(dev, 4, pic[0x02]); /* IDE DMA */
+    macio_init(macio, pic_mem, escc_bar);
 
     /* We only emulate 2 out of 3 IDE controllers for now */
     macio_ide = MACIO_IDE(object_resolve_path_component(OBJECT(macio),
@@ -385,6 +381,9 @@ static void ppc_core99_init(QEMUMachineInitArgs *args)
                                                         "ide[1]"));
     macio_ide_init_drives(macio_ide, &hd[MAX_IDE_DEVS]);
 
+    adb_kbd_init(&adb_bus);
+    adb_mouse_init(&adb_bus);
+
     if (usb_enabled(machine_arch == ARCH_MAC99_U3)) {
         pci_create_simple(pci_bus, -1, "pci-ohci");
         /* U3 needs to use USB for input because Linux doesn't support via-cuda
diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index 7014b4c..4ffdd01 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -93,7 +93,7 @@ static void ppc_heathrow_init(QEMUMachineInitArgs *args)
     MACIOIDEState *macio_ide;
     DeviceState *dev;
     int bios_size;
-    MemoryRegion *pic_mem, *cuda_mem;
+    MemoryRegion *pic_mem;
     MemoryRegion *escc_mem, *escc_bar = g_new(MemoryRegion, 1);
     uint16_t ppc_boot_device;
     DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
@@ -263,17 +263,12 @@ static void ppc_heathrow_init(QEMUMachineInitArgs *args)
 
     ide_drive_get(hd, MAX_IDE_BUS);
 
-    /* cuda also initialize ADB */
-    cuda_init(&cuda_mem, pic[0x12]);
-
-    adb_kbd_init(&adb_bus);
-    adb_mouse_init(&adb_bus);
-
     macio = pci_create(pci_bus, -1, TYPE_OLDWORLD_MACIO);
     dev = DEVICE(macio);
-    qdev_connect_gpio_out(dev, 0, pic[0x0D]); /* IDE */
-    qdev_connect_gpio_out(dev, 1, pic[0x02]); /* IDE DMA */
-    macio_init(macio, pic_mem, cuda_mem, escc_bar);
+    qdev_connect_gpio_out(dev, 0, pic[0x12]); /* CUDA */
+    qdev_connect_gpio_out(dev, 1, pic[0x0D]); /* IDE */
+    qdev_connect_gpio_out(dev, 2, pic[0x02]); /* IDE DMA */
+    macio_init(macio, pic_mem, escc_bar);
 
     /* First IDE channel is a MAC IDE on the MacIO bus */
     macio_ide = MACIO_IDE(object_resolve_path_component(OBJECT(macio),
@@ -286,6 +281,9 @@ static void ppc_heathrow_init(QEMUMachineInitArgs *args)
     hd[3] = hd[2] = NULL;
     pci_cmd646_ide_init(pci_bus, hd, 0);
 
+    adb_kbd_init(&adb_bus);
+    adb_mouse_init(&adb_bus);
+
     if (usb_enabled(false)) {
         pci_create_simple(pci_bus, -1, "pci-ohci");
     }
