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-rw-r--r--src/devices/bus/cbm2/exp.c206
1 files changed, 206 insertions, 0 deletions
diff --git a/src/devices/bus/cbm2/exp.c b/src/devices/bus/cbm2/exp.c
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+++ b/src/devices/bus/cbm2/exp.c
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Commodore CBM-II Expansion Port emulation
+
+**********************************************************************/
+
+#include "exp.h"
+
+
+
+//**************************************************************************
+// MACROS/CONSTANTS
+//**************************************************************************
+
+#define LOG 0
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type CBM2_EXPANSION_SLOT = &device_creator<cbm2_expansion_slot_device>;
+
+
+
+//**************************************************************************
+// DEVICE CBM2_EXPANSION CARD INTERFACE
+//**************************************************************************
+
+//-------------------------------------------------
+// device_cbm2_expansion_card_interface - constructor
+//-------------------------------------------------
+
+device_cbm2_expansion_card_interface::device_cbm2_expansion_card_interface(const machine_config &mconfig, device_t &device)
+ : device_slot_card_interface(mconfig, device),
+ m_bank1(*this, "bank1"),
+ m_bank2(*this, "bank2"),
+ m_bank3(*this, "bank3")
+{
+ m_slot = dynamic_cast<cbm2_expansion_slot_device *>(device.owner());
+}
+
+
+//-------------------------------------------------
+// ~device_cbm2_expansion_card_interface - destructor
+//-------------------------------------------------
+
+device_cbm2_expansion_card_interface::~device_cbm2_expansion_card_interface()
+{
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// cbm2_expansion_slot_device - constructor
+//-------------------------------------------------
+
+cbm2_expansion_slot_device::cbm2_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, CBM2_EXPANSION_SLOT, "CBM-II expansion port", tag, owner, clock, "cbm2_expansion_slot", __FILE__),
+ device_slot_interface(mconfig, *this),
+ device_image_interface(mconfig, *this)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void cbm2_expansion_slot_device::device_start()
+{
+ m_card = dynamic_cast<device_cbm2_expansion_card_interface *>(get_card_device());
+
+ // inherit bus clock
+ if (clock() == 0)
+ {
+ cbm2_expansion_slot_device *root = machine().device<cbm2_expansion_slot_device>(CBM2_EXPANSION_SLOT_TAG);
+ assert(root);
+ set_unscaled_clock(root->clock());
+ }
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void cbm2_expansion_slot_device::device_reset()
+{
+}
+
+
+//-------------------------------------------------
+// call_load -
+//-------------------------------------------------
+
+bool cbm2_expansion_slot_device::call_load()
+{
+ size_t size = 0;
+
+ if (m_card)
+ {
+ if (software_entry() == NULL)
+ {
+ size = length();
+
+ if (!core_stricmp(filetype(), "20"))
+ {
+ m_card->m_bank1.allocate(size);
+ fread(m_card->m_bank1, size);
+ }
+ else if (!core_stricmp(filetype(), "40"))
+ {
+ m_card->m_bank2.allocate(size);
+ fread(m_card->m_bank2, size);
+ }
+ else if (!core_stricmp(filetype(), "60"))
+ {
+ m_card->m_bank3.allocate(size);
+ fread(m_card->m_bank3, size);
+ }
+ }
+ else
+ {
+ load_software_region("bank1", m_card->m_bank1);
+ load_software_region("bank2", m_card->m_bank2);
+ load_software_region("bank3", m_card->m_bank3);
+ }
+ }
+
+ return IMAGE_INIT_PASS;
+}
+
+
+//-------------------------------------------------
+// call_softlist_load -
+//-------------------------------------------------
+
+bool cbm2_expansion_slot_device::call_softlist_load(software_list_device &swlist, const char *swname, const rom_entry *start_entry)
+{
+ load_software_part_region(*this, swlist, swname, start_entry);
+
+ return true;
+}
+
+
+//-------------------------------------------------
+// get_default_card_software -
+//-------------------------------------------------
+
+void cbm2_expansion_slot_device::get_default_card_software(std::string &result)
+{
+ software_get_default_slot(result, "standard");
+}
+
+
+//-------------------------------------------------
+// read - cartridge data read
+//-------------------------------------------------
+
+UINT8 cbm2_expansion_slot_device::read(address_space &space, offs_t offset, UINT8 data, int csbank1, int csbank2, int csbank3)
+{
+ if (m_card != NULL)
+ {
+ data = m_card->cbm2_bd_r(space, offset, data, csbank1, csbank2, csbank3);
+ }
+
+ return data;
+}
+
+
+//-------------------------------------------------
+// write - cartridge data write
+//-------------------------------------------------
+
+void cbm2_expansion_slot_device::write(address_space &space, offs_t offset, UINT8 data, int csbank1, int csbank2, int csbank3)
+{
+ if (m_card != NULL)
+ {
+ m_card->cbm2_bd_w(space, offset, data, csbank1, csbank2, csbank3);
+ }
+}
+
+
+//-------------------------------------------------
+// SLOT_INTERFACE( cbm2_expansion_cards )
+//-------------------------------------------------
+
+// slot devices
+#include "24k.h"
+#include "hrg.h"
+#include "std.h"
+
+SLOT_INTERFACE_START( cbm2_expansion_cards )
+ SLOT_INTERFACE("24k", CBM2_24K)
+ SLOT_INTERFACE("hrga", CBM2_HRG_A)
+ SLOT_INTERFACE("hrgb", CBM2_HRG_B)
+ SLOT_INTERFACE_INTERNAL("standard", CBM2_STD)
+SLOT_INTERFACE_END