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author Curt Coder <curtcoder@mail.com>2013-10-22 15:44:27 +0000
committer Curt Coder <curtcoder@mail.com>2013-10-22 15:44:27 +0000
commit0b91c21b366be4d0c1bcabdbe74e6b9d82a62271 (patch)
tree1804ed0b9de916825d5fc7e1387d33aac256f4c0 /src/emu/bus/cbm2/exp.c
parent47c548e760b6c4447f7b15e7d403060d0051b994 (diff)
(MESS) Moved a bunch of buses under emu/bus. (nw)
Diffstat (limited to 'src/emu/bus/cbm2/exp.c')
-rw-r--r--src/emu/bus/cbm2/exp.c304
1 files changed, 304 insertions, 0 deletions
diff --git a/src/emu/bus/cbm2/exp.c b/src/emu/bus/cbm2/exp.c
new file mode 100644
index 00000000000..315fa7cbe78
--- /dev/null
+++ b/src/emu/bus/cbm2/exp.c
@@ -0,0 +1,304 @@
+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Commodore CBM-II Expansion Port emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#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(NULL),
+ m_bank2(NULL),
+ m_bank3(NULL),
+ m_ram(NULL),
+ m_nvram(NULL),
+ m_nvram_size(0),
+ m_bank1_mask(0),
+ m_bank2_mask(0),
+ m_bank3_mask(0),
+ m_ram_mask(0)
+{
+ 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()
+{
+}
+
+
+//-------------------------------------------------
+// cbm2_bank1_pointer - get bank 1 pointer
+//-------------------------------------------------
+
+UINT8* device_cbm2_expansion_card_interface::cbm2_bank1_pointer(running_machine &machine, size_t size)
+{
+ if (m_bank1 == NULL)
+ {
+ m_bank1 = auto_alloc_array(machine, UINT8, size);
+
+ m_bank1_mask = size - 1;
+ }
+
+ return m_bank1;
+}
+
+
+//-------------------------------------------------
+// cbm2_bank2_pointer - get bank 2 pointer
+//-------------------------------------------------
+
+UINT8* device_cbm2_expansion_card_interface::cbm2_bank2_pointer(running_machine &machine, size_t size)
+{
+ if (m_bank2 == NULL)
+ {
+ m_bank2 = auto_alloc_array(machine, UINT8, size);
+
+ m_bank2_mask = size - 1;
+ }
+
+ return m_bank2;
+}
+
+
+//-------------------------------------------------
+// cbm2_bank3_pointer - get bank 3 pointer
+//-------------------------------------------------
+
+UINT8* device_cbm2_expansion_card_interface::cbm2_bank3_pointer(running_machine &machine, size_t size)
+{
+ if (m_bank3 == NULL)
+ {
+ m_bank3 = auto_alloc_array(machine, UINT8, size);
+
+ m_bank3_mask = size - 1;
+ }
+
+ return m_bank3;
+}
+
+
+//-------------------------------------------------
+// cbm2_ram_pointer - get RAM pointer
+//-------------------------------------------------
+
+UINT8* device_cbm2_expansion_card_interface::cbm2_ram_pointer(running_machine &machine, size_t size)
+{
+ if (m_ram == NULL)
+ {
+ m_ram = auto_alloc_array(machine, UINT8, size);
+
+ m_ram_mask = size - 1;
+ }
+
+ return m_ram;
+}
+
+
+//-------------------------------------------------
+// cbm2_ram_pointer - get NVRAM pointer
+//-------------------------------------------------
+
+UINT8* device_cbm2_expansion_card_interface::cbm2_nvram_pointer(running_machine &machine, size_t size)
+{
+ if (m_nvram == NULL)
+ {
+ m_nvram = auto_alloc_array(machine, UINT8, size);
+
+ m_nvram_mask = size - 1;
+ m_nvram_size = size;
+ }
+
+ return m_nvram;
+}
+
+
+
+//**************************************************************************
+// 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 (!mame_stricmp(filetype(), "20"))
+ {
+ fread(m_card->cbm2_bank1_pointer(machine(), size), size);
+ }
+ else if (!mame_stricmp(filetype(), "40"))
+ {
+ fread(m_card->cbm2_bank2_pointer(machine(), size), size);
+ }
+ else if (!mame_stricmp(filetype(), "60"))
+ {
+ fread(m_card->cbm2_bank3_pointer(machine(), size), size);
+ }
+ }
+ else
+ {
+ size = get_software_region_length("bank1");
+ if (size) memcpy(m_card->cbm2_bank1_pointer(machine(), size), get_software_region("bank1"), size);
+
+ size = get_software_region_length("bank2");
+ if (size) memcpy(m_card->cbm2_bank2_pointer(machine(), size), get_software_region("bank2"), size);
+
+ size = get_software_region_length("bank3");
+ if (size) memcpy(m_card->cbm2_bank3_pointer(machine(), size), get_software_region("bank3"), size);
+
+ size = get_software_region_length("ram");
+ if (size) memset(m_card->cbm2_ram_pointer(machine(), size), 0, size);
+
+ size = get_software_region_length("nvram");
+ if (size) memset(m_card->cbm2_nvram_pointer(machine(), size), 0, size);
+ }
+ }
+
+ return IMAGE_INIT_PASS;
+}
+
+
+//-------------------------------------------------
+// call_softlist_load -
+//-------------------------------------------------
+
+bool cbm2_expansion_slot_device::call_softlist_load(char *swlist, char *swname, rom_entry *start_entry)
+{
+ load_software_part_region(this, swlist, swname, start_entry);
+
+ return true;
+}
+
+
+//-------------------------------------------------
+// get_default_card_software -
+//-------------------------------------------------
+
+const char * cbm2_expansion_slot_device::get_default_card_software(const machine_config &config, emu_options &options)
+{
+ return software_get_default_slot(config, options, this, "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_INTERFACE_START( cbm2_expansion_cards )
+ SLOT_INTERFACE("24k", CBM2_24K)
+ SLOT_INTERFACE_INTERNAL("standard", CBM2_STD)
+ SLOT_INTERFACE_INTERNAL("graphic", CBM2_GRAPHIC)
+SLOT_INTERFACE_END