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-rw-r--r--src/devices/bus/cbm2/std.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/src/devices/bus/cbm2/std.c b/src/devices/bus/cbm2/std.c
new file mode 100644
index 00000000000..e6e697927dc
--- /dev/null
+++ b/src/devices/bus/cbm2/std.c
@@ -0,0 +1,65 @@
+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Commodore CBM-II Standard cartridge emulation
+
+**********************************************************************/
+
+#include "std.h"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type CBM2_STD = &device_creator<cbm2_standard_cartridge_device>;
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// cbm2_standard_cartridge_device - constructor
+//-------------------------------------------------
+
+cbm2_standard_cartridge_device::cbm2_standard_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, CBM2_STD, "CBM-II standard cartridge", tag, owner, clock, "cbm2_standard", __FILE__),
+ device_cbm2_expansion_card_interface(mconfig, *this)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void cbm2_standard_cartridge_device::device_start()
+{
+}
+
+
+//-------------------------------------------------
+// cbm2_bd_r - cartridge data read
+//-------------------------------------------------
+
+UINT8 cbm2_standard_cartridge_device::cbm2_bd_r(address_space &space, offs_t offset, UINT8 data, int csbank1, int csbank2, int csbank3)
+{
+ if (!csbank1 && m_bank1.bytes())
+ {
+ data = m_bank1[offset & m_bank1.mask()];
+ }
+ else if (!csbank2 && m_bank2.bytes())
+ {
+ data = m_bank2[offset & m_bank2.mask()];
+ }
+ else if (!csbank3 && m_bank3.bytes())
+ {
+ data = m_bank3[offset & m_bank3.mask()];
+ }
+
+ return data;
+}