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-rw-r--r--src/mess/machine/c64exp.c476
1 files changed, 476 insertions, 0 deletions
diff --git a/src/mess/machine/c64exp.c b/src/mess/machine/c64exp.c
new file mode 100644
index 00000000000..37123f377be
--- /dev/null
+++ b/src/mess/machine/c64exp.c
@@ -0,0 +1,476 @@
+/**********************************************************************
+
+ Commodore 64 Expansion Port emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#include "machine/c64exp.h"
+
+
+
+//**************************************************************************
+// MACROS/CONSTANTS
+//**************************************************************************
+
+#define LOG 0
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type C64_EXPANSION_SLOT = &device_creator<c64_expansion_slot_device>;
+
+
+
+//**************************************************************************
+// DEVICE C64_EXPANSION CARD INTERFACE
+//**************************************************************************
+
+//-------------------------------------------------
+// device_c64_expansion_card_interface - constructor
+//-------------------------------------------------
+
+device_c64_expansion_card_interface::device_c64_expansion_card_interface(const machine_config &mconfig, device_t &device)
+ : device_slot_card_interface(mconfig, device),
+ m_roml(NULL),
+ m_romh(NULL),
+ m_ram(NULL),
+ m_nvram(NULL),
+ m_nvram_size(0),
+ m_roml_mask(0),
+ m_romh_mask(0),
+ m_ram_mask(0),
+ m_game(1),
+ m_exrom(1)
+{
+ m_slot = dynamic_cast<c64_expansion_slot_device *>(device.owner());
+}
+
+
+//-------------------------------------------------
+// ~device_c64_expansion_card_interface - destructor
+//-------------------------------------------------
+
+device_c64_expansion_card_interface::~device_c64_expansion_card_interface()
+{
+}
+
+
+//-------------------------------------------------
+// c64_roml_pointer - get low ROM pointer
+//-------------------------------------------------
+
+UINT8* device_c64_expansion_card_interface::c64_roml_pointer(running_machine &machine, size_t size)
+{
+ if (m_roml == NULL)
+ {
+ m_roml = auto_alloc_array(machine, UINT8, size);
+
+ m_roml_mask = size - 1;
+ }
+
+ return m_roml;
+}
+
+
+//-------------------------------------------------
+// c64_romh_pointer - get high ROM pointer
+//-------------------------------------------------
+
+UINT8* device_c64_expansion_card_interface::c64_romh_pointer(running_machine &machine, size_t size)
+{
+ if (m_romh == NULL)
+ {
+ m_romh = auto_alloc_array(machine, UINT8, size);
+
+ m_romh_mask = size - 1;
+ }
+
+ return m_romh;
+}
+
+
+//-------------------------------------------------
+// c64_ram_pointer - get RAM pointer
+//-------------------------------------------------
+
+UINT8* device_c64_expansion_card_interface::c64_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;
+}
+
+
+//-------------------------------------------------
+// c64_ram_pointer - get NVRAM pointer
+//-------------------------------------------------
+
+UINT8* device_c64_expansion_card_interface::c64_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
+//**************************************************************************
+
+//-------------------------------------------------
+// c64_expansion_slot_device - constructor
+//-------------------------------------------------
+
+c64_expansion_slot_device::c64_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, C64_EXPANSION_SLOT, "C64 expansion port", tag, owner, clock),
+ device_slot_interface(mconfig, *this),
+ device_image_interface(mconfig, *this)
+{
+}
+
+
+//-------------------------------------------------
+// c64_expansion_slot_device - destructor
+//-------------------------------------------------
+
+c64_expansion_slot_device::~c64_expansion_slot_device()
+{
+}
+
+
+//-------------------------------------------------
+// device_config_complete - perform any
+// operations now that the configuration is
+// complete
+//-------------------------------------------------
+
+void c64_expansion_slot_device::device_config_complete()
+{
+ // inherit a copy of the static data
+ const c64_expansion_slot_interface *intf = reinterpret_cast<const c64_expansion_slot_interface *>(static_config());
+ if (intf != NULL)
+ {
+ *static_cast<c64_expansion_slot_interface *>(this) = *intf;
+ }
+
+ // or initialize to defaults if none provided
+ else
+ {
+ memset(&m_in_dma_cd_cb, 0, sizeof(m_in_dma_cd_cb));
+ memset(&m_out_dma_cd_cb, 0, sizeof(m_out_dma_cd_cb));
+ memset(&m_out_irq_cb, 0, sizeof(m_out_irq_cb));
+ memset(&m_out_nmi_cb, 0, sizeof(m_out_nmi_cb));
+ memset(&m_out_dma_cb, 0, sizeof(m_out_dma_cb));
+ memset(&m_out_reset_cb, 0, sizeof(m_out_reset_cb));
+ }
+
+ // set brief and instance name
+ update_names();
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void c64_expansion_slot_device::device_start()
+{
+ m_cart = dynamic_cast<device_c64_expansion_card_interface *>(get_card_device());
+
+ // resolve callbacks
+ m_in_dma_cd_func.resolve(m_in_dma_cd_cb, *this);
+ m_out_dma_cd_func.resolve(m_out_dma_cd_cb, *this);
+ m_out_irq_func.resolve(m_out_irq_cb, *this);
+ m_out_nmi_func.resolve(m_out_nmi_cb, *this);
+ m_out_dma_func.resolve(m_out_dma_cb, *this);
+ m_out_reset_func.resolve(m_out_reset_cb, *this);
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void c64_expansion_slot_device::device_reset()
+{
+ port_reset_w(ASSERT_LINE);
+ port_reset_w(CLEAR_LINE);
+}
+
+
+//-------------------------------------------------
+// call_load -
+//-------------------------------------------------
+
+bool c64_expansion_slot_device::call_load()
+{
+ if (m_cart)
+ {
+ size_t size = 0;
+
+ if (software_entry() == NULL)
+ {
+ size = length();
+
+ if (!mame_stricmp(filetype(), "80"))
+ {
+ fread(m_cart->c64_roml_pointer(machine(), size), size);
+ m_cart->m_exrom = (0);
+
+ if (size == 0x4000)
+ {
+ m_cart->m_game = 0;
+ }
+ }
+ else if (!mame_stricmp(filetype(), "a0"))
+ {
+ fread(m_cart->c64_romh_pointer(machine(), 0x2000), 0x2000);
+
+ m_cart->m_exrom = 0;
+ m_cart->m_game = 0;
+ }
+ else if (!mame_stricmp(filetype(), "e0"))
+ {
+ fread(m_cart->c64_romh_pointer(machine(), 0x2000), 0x2000);
+
+ m_cart->m_game = 0;
+ }
+ else if (!mame_stricmp(filetype(), "crt"))
+ {
+ size_t roml_size = 0;
+ size_t romh_size = 0;
+ int exrom = 1;
+ int game = 1;
+
+ if (cbm_crt_read_header(m_file, &roml_size, &romh_size, &exrom, &game))
+ {
+ UINT8 *roml = NULL;
+ UINT8 *romh = NULL;
+
+ if (roml_size) roml = m_cart->c64_roml_pointer(machine(), roml_size);
+ if (romh_size) romh = m_cart->c64_romh_pointer(machine(), romh_size);
+
+ cbm_crt_read_data(m_file, roml, romh);
+ }
+
+ m_cart->m_exrom = exrom;
+ m_cart->m_game = game;
+ }
+ }
+ else
+ {
+ size = get_software_region_length("uprom");
+
+ if (size)
+ {
+ // Ultimax (VIC-10) cartridge
+ memcpy(m_cart->c64_romh_pointer(machine(), size), get_software_region("uprom"), size);
+
+ size = get_software_region_length("lorom");
+ if (size) memcpy(m_cart->c64_roml_pointer(machine(), size), get_software_region("lorom"), size);
+
+ m_cart->m_exrom = 1;
+ m_cart->m_game = 0;
+ }
+ else
+ {
+ // Commodore 64/128 cartridge
+ size = get_software_region_length("roml");
+ if (size) memcpy(m_cart->c64_roml_pointer(machine(), size), get_software_region("roml"), size);
+
+ size = get_software_region_length("romh");
+ if (size) memcpy(m_cart->c64_romh_pointer(machine(), size), get_software_region("romh"), size);
+
+ size = get_software_region_length("ram");
+ if (size) memset(m_cart->c64_ram_pointer(machine(), size), 0, size);
+
+ size = get_software_region_length("nvram");
+ if (size) memset(m_cart->c64_nvram_pointer(machine(), size), 0, size);
+
+ m_cart->m_exrom = atol(get_feature("exrom"));
+ m_cart->m_game = atol(get_feature("game"));
+ }
+ }
+ }
+
+ return IMAGE_INIT_PASS;
+}
+
+
+//-------------------------------------------------
+// call_softlist_load -
+//-------------------------------------------------
+
+bool c64_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 * c64_expansion_slot_device::get_default_card_software(const machine_config &config, emu_options &options)
+{
+ if (open_image_file(options))
+ {
+ if (!mame_stricmp(filetype(), "crt"))
+ {
+ return cbm_crt_get_card(m_file);
+ }
+
+ clear();
+ }
+
+ return software_get_default_slot(config, options, this, "standard");
+}
+
+
+//-------------------------------------------------
+// cd_r - cartridge data read
+//-------------------------------------------------
+
+UINT8 c64_expansion_slot_device::cd_r(address_space &space, offs_t offset, int ba, int roml, int romh, int io1, int io2)
+{
+ UINT8 data = 0;
+
+ if (m_cart != NULL)
+ {
+ data = m_cart->c64_cd_r(space, offset, ba, roml, romh, io1, io2);
+ }
+
+ return data;
+}
+
+
+//-------------------------------------------------
+// cd_w - cartridge data write
+//-------------------------------------------------
+
+void c64_expansion_slot_device::cd_w(address_space &space, offs_t offset, UINT8 data, int ba, int roml, int romh, int io1, int io2)
+{
+ if (m_cart != NULL)
+ {
+ m_cart->c64_cd_w(space, offset, data, ba, roml, romh, io1, io2);
+ }
+}
+
+
+//-------------------------------------------------
+// game_r - GAME read
+//-------------------------------------------------
+
+int c64_expansion_slot_device::game_r(offs_t offset, int ba, int rw, int hiram)
+{
+ int state = 1;
+
+ if (m_cart != NULL)
+ {
+ state = m_cart->c64_game_r(offset, ba, rw, hiram);
+ }
+
+ return state;
+}
+
+
+//-------------------------------------------------
+// exrom_r - EXROM read
+//-------------------------------------------------
+
+int c64_expansion_slot_device::exrom_r(offs_t offset, int ba, int rw, int hiram)
+{
+ int state = 1;
+
+ if (m_cart != NULL)
+ {
+ state = m_cart->c64_exrom_r(offset, ba, rw, hiram);
+ }
+
+ return state;
+}
+
+
+//-------------------------------------------------
+// screen_update -
+//-------------------------------------------------
+
+UINT32 c64_expansion_slot_device::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
+{
+ bool value = false;
+
+ if (m_cart != NULL)
+ {
+ value = m_cart->c64_screen_update(screen, bitmap, cliprect);
+ }
+
+ return value;
+}
+
+WRITE_LINE_MEMBER( c64_expansion_slot_device::port_reset_w ) { if (m_cart != NULL) m_cart->c64_reset_w(state); }
+
+
+//-------------------------------------------------
+// dma_cd_r - DMA read
+//-------------------------------------------------
+
+UINT8 c64_expansion_slot_device::dma_cd_r(offs_t offset)
+{
+ return m_in_dma_cd_func(offset);
+}
+
+
+//-------------------------------------------------
+// dma_cd_w - DMA write
+//-------------------------------------------------
+
+void c64_expansion_slot_device::dma_cd_w(offs_t offset, UINT8 data)
+{
+ m_out_dma_cd_func(offset, data);
+}
+
+
+WRITE_LINE_MEMBER( c64_expansion_slot_device::irq_w ) { m_out_irq_func(state); }
+WRITE_LINE_MEMBER( c64_expansion_slot_device::nmi_w ) { m_out_nmi_func(state); }
+WRITE_LINE_MEMBER( c64_expansion_slot_device::dma_w ) { m_out_dma_func(state); }
+WRITE_LINE_MEMBER( c64_expansion_slot_device::reset_w ) { m_out_reset_func(state); }
+
+
+//-------------------------------------------------
+// phi2 - system clock frequency
+//-------------------------------------------------
+
+int c64_expansion_slot_device::phi2()
+{
+ return clock();
+}
+
+
+//-------------------------------------------------
+// dotclock - dot clock frequency
+//-------------------------------------------------
+
+int c64_expansion_slot_device::dotclock()
+{
+ return phi2() * 8;
+}