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-rw-r--r--src/devices/bus/c64/16kb.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/src/devices/bus/c64/16kb.c b/src/devices/bus/c64/16kb.c
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index 00000000000..ff2ce6e3932
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+++ b/src/devices/bus/c64/16kb.c
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Commodore 64 16KB EPROM cartridge emulation
+
+**********************************************************************/
+
+#include "16kb.h"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type C64_16KB = &device_creator<c64_16kb_cartridge_device>;
+
+
+//-------------------------------------------------
+// MACHINE_CONFIG_FRAGMENT( c64_16kb )
+//-------------------------------------------------
+
+static MACHINE_CONFIG_FRAGMENT( c64_16kb )
+ MCFG_GENERIC_CARTSLOT_ADD("roml", generic_linear_slot, NULL)
+ MCFG_GENERIC_EXTENSIONS("rom,bin,80")
+
+ MCFG_GENERIC_CARTSLOT_ADD("romh", generic_linear_slot, NULL)
+ MCFG_GENERIC_EXTENSIONS("rom,bin,a0,e0")
+MACHINE_CONFIG_END
+
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor c64_16kb_cartridge_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( c64_16kb );
+}
+
+
+//-------------------------------------------------
+// INPUT_PORTS( c64_16kb )
+//-------------------------------------------------
+
+static INPUT_PORTS_START( c64_16kb )
+ PORT_START("SW1")
+ PORT_DIPNAME( 0x03, 0x00, "Mode" )
+ PORT_DIPSETTING( 0x03, "Off" )
+ PORT_DIPSETTING( 0x02, "8 KB" )
+ PORT_DIPSETTING( 0x00, "16 KB" )
+ PORT_DIPSETTING( 0x01, "Ultimax" )
+INPUT_PORTS_END
+
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor c64_16kb_cartridge_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( c64_16kb );
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// c64_16kb_cartridge_device - constructor
+//-------------------------------------------------
+
+c64_16kb_cartridge_device::c64_16kb_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, C64_16KB, "C64 16KB EPROM cartridge", tag, owner, clock, "c64_16kb", __FILE__),
+ device_c64_expansion_card_interface(mconfig, *this),
+ m_sw1(*this, "SW1"),
+ m_low(*this, "roml"),
+ m_high(*this, "romh")
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void c64_16kb_cartridge_device::device_start()
+{
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void c64_16kb_cartridge_device::device_reset()
+{
+ UINT8 mode = m_sw1->read();
+
+ m_exrom = BIT(mode, 0);
+ m_game = BIT(mode, 1);
+}
+
+
+//-------------------------------------------------
+// c64_cd_r - cartridge data read
+//-------------------------------------------------
+
+UINT8 c64_16kb_cartridge_device::c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2)
+{
+ if (!roml)
+ {
+ data = m_low->read_rom(space, offset & 0x1fff);
+ }
+ else if (!romh)
+ {
+ data = m_high->read_rom(space, offset & 0x1fff);
+ }
+
+ return data;
+}