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-rw-r--r--src/devices/bus/c64/std.cpp68
1 files changed, 68 insertions, 0 deletions
diff --git a/src/devices/bus/c64/std.cpp b/src/devices/bus/c64/std.cpp
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index 00000000000..6fa3abfef1d
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+++ b/src/devices/bus/c64/std.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Commodore 64 Standard 8K/16K cartridge emulation
+
+**********************************************************************/
+
+#include "std.h"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type C64_STD = &device_creator<c64_standard_cartridge_device>;
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// c64_standard_cartridge_device - constructor
+//-------------------------------------------------
+
+c64_standard_cartridge_device::c64_standard_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, C64_STD, "C64 standard cartridge", tag, owner, clock, "c64_standard", __FILE__),
+ device_c64_expansion_card_interface(mconfig, *this)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void c64_standard_cartridge_device::device_start()
+{
+}
+
+
+//-------------------------------------------------
+// c64_cd_r - cartridge data read
+//-------------------------------------------------
+
+UINT8 c64_standard_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 && m_roml.bytes())
+ {
+ data = m_roml[offset & m_roml.mask()];
+ }
+ else if (!romh)
+ {
+ if (m_romh.bytes())
+ {
+ data = m_romh[offset & m_romh.mask()];
+ }
+ else if (m_roml.mask() == 0x3fff)
+ {
+ data = m_roml[offset & m_roml.mask()];
+ }
+ }
+
+ return data;
+}