summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/pet/exp.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/bus/pet/exp.c')
-rw-r--r--src/devices/bus/pet/exp.c204
1 files changed, 204 insertions, 0 deletions
diff --git a/src/devices/bus/pet/exp.c b/src/devices/bus/pet/exp.c
new file mode 100644
index 00000000000..e550c2cf80f
--- /dev/null
+++ b/src/devices/bus/pet/exp.c
@@ -0,0 +1,204 @@
+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Commodore PET Memory Expansion Port emulation
+
+**********************************************************************/
+
+#include "exp.h"
+
+
+
+//**************************************************************************
+// MACROS/CONSTANTS
+//**************************************************************************
+
+#define LOG 0
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type PET_EXPANSION_SLOT = &device_creator<pet_expansion_slot_device>;
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// pet_expansion_slot_device - constructor
+//-------------------------------------------------
+
+pet_expansion_slot_device::pet_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, PET_EXPANSION_SLOT, "PET memory expansion port", tag, owner, clock, "pet_expansion_slot", __FILE__),
+ device_slot_interface(mconfig, *this),
+ m_read_dma(*this),
+ m_write_dma(*this)
+{
+}
+
+
+//-------------------------------------------------
+// pet_expansion_slot_device - destructor
+//-------------------------------------------------
+
+pet_expansion_slot_device::~pet_expansion_slot_device()
+{
+}
+
+
+//-------------------------------------------------
+// device_pet_expansion_card_interface - constructor
+//-------------------------------------------------
+
+device_pet_expansion_card_interface::device_pet_expansion_card_interface(const machine_config &mconfig, device_t &device)
+ : device_slot_card_interface(mconfig, device)
+{
+ m_slot = dynamic_cast<pet_expansion_slot_device *>(device.owner());
+}
+
+
+//-------------------------------------------------
+// ~device_pet_expansion_card_interface - destructor
+//-------------------------------------------------
+
+device_pet_expansion_card_interface::~device_pet_expansion_card_interface()
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void pet_expansion_slot_device::device_start()
+{
+ m_card = dynamic_cast<device_pet_expansion_card_interface *>(get_card_device());
+
+ // resolve callbacks
+ m_read_dma.resolve_safe(0);
+ m_write_dma.resolve_safe();
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void pet_expansion_slot_device::device_reset()
+{
+ if (m_card != NULL)
+ {
+ get_card_device()->reset();
+ }
+}
+
+
+//-------------------------------------------------
+// norom_r - NO ROM read
+//-------------------------------------------------
+
+int pet_expansion_slot_device::norom_r(address_space &space, offs_t offset, int sel)
+{
+ return m_card ? m_card->pet_norom_r(space, offset, sel) : 1;
+}
+
+
+//-------------------------------------------------
+// read - buffered data read
+//-------------------------------------------------
+
+UINT8 pet_expansion_slot_device::read(address_space &space, offs_t offset, UINT8 data, int &sel)
+{
+ if (m_card != NULL)
+ {
+ data = m_card->pet_bd_r(space, offset, data, sel);
+ }
+
+ return data;
+}
+
+
+//-------------------------------------------------
+// write - buffered data write
+//-------------------------------------------------
+
+void pet_expansion_slot_device::write(address_space &space, offs_t offset, UINT8 data, int &sel)
+{
+ if (m_card != NULL)
+ {
+ m_card->pet_bd_w(space, offset, data, sel);
+ }
+}
+
+
+//-------------------------------------------------
+// diag_r - DIAG read
+//-------------------------------------------------
+
+READ_LINE_MEMBER( pet_expansion_slot_device::diag_r )
+{
+ return m_card ? m_card->pet_diag_r() : 1;
+}
+
+
+//-------------------------------------------------
+// irq_w - IRQ write
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER( pet_expansion_slot_device::irq_w )
+{
+ if (m_card) m_card->pet_irq_w(state);
+}
+
+
+//-------------------------------------------------
+// dma_bd_r - DMA read
+//-------------------------------------------------
+
+UINT8 pet_expansion_slot_device::dma_bd_r(offs_t offset)
+{
+ return m_read_dma(offset);
+}
+
+
+//-------------------------------------------------
+// dma_bd_w - DMA write
+//-------------------------------------------------
+
+void pet_expansion_slot_device::dma_bd_w(offs_t offset, UINT8 data)
+{
+ m_write_dma(offset, data);
+}
+
+
+//-------------------------------------------------
+// phi2 - system clock frequency
+//-------------------------------------------------
+
+int pet_expansion_slot_device::phi2()
+{
+ return clock();
+}
+
+
+//-------------------------------------------------
+// SLOT_INTERFACE( pet_expansion_cards )
+//-------------------------------------------------
+
+// slot devices
+#include "64k.h"
+#include "hsg.h"
+#include "superpet.h"
+
+SLOT_INTERFACE_START( pet_expansion_cards )
+ SLOT_INTERFACE("64k", PET_64K)
+ SLOT_INTERFACE("hsga", CBM8000_HSG_A)
+ SLOT_INTERFACE("hsgb", CBM8000_HSG_B)
+ SLOT_INTERFACE("superpet", SUPERPET)
+SLOT_INTERFACE_END