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-rw-r--r--src/mess/machine/vic20std.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/src/mess/machine/vic20std.c b/src/mess/machine/vic20std.c
new file mode 100644
index 00000000000..59f27529b87
--- /dev/null
+++ b/src/mess/machine/vic20std.c
@@ -0,0 +1,72 @@
+/**********************************************************************
+
+ Commodore VIC-20 Standard 8K/16K ROM Cartridge emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#include "vic20std.h"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type VIC20_STD = &device_creator<vic20_standard_cartridge_device>;
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// vic20_standard_cartridge_device - constructor
+//-------------------------------------------------
+
+vic20_standard_cartridge_device::vic20_standard_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, VIC20_STD, "VIC-20 Standard Cartridge", tag, owner, clock),
+ device_vic20_expansion_card_interface(mconfig, *this)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void vic20_standard_cartridge_device::device_start()
+{
+}
+
+
+//-------------------------------------------------
+// vic20_cd_r - cartridge data read
+//-------------------------------------------------
+
+UINT8 vic20_standard_cartridge_device::vic20_cd_r(address_space &space, offs_t offset, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3)
+{
+ UINT8 data = 0;
+
+ if (!blk1 && (m_blk1 != NULL))
+ {
+ data = m_blk1[offset & 0x1fff];
+ }
+ else if (!blk2 && (m_blk2 != NULL))
+ {
+ data = m_blk2[offset & 0x1fff];
+ }
+ else if (!blk3 && (m_blk3 != NULL))
+ {
+ data = m_blk3[offset & 0x1fff];
+ }
+ else if (!blk5 && (m_blk5 != NULL))
+ {
+ data = m_blk5[offset & 0x1fff];
+ }
+
+ return data;
+}