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Diffstat (limited to 'src/devices/bus/c64/c128_comal80.cpp')
-rw-r--r--src/devices/bus/c64/c128_comal80.cpp103
1 files changed, 103 insertions, 0 deletions
diff --git a/src/devices/bus/c64/c128_comal80.cpp b/src/devices/bus/c64/c128_comal80.cpp
new file mode 100644
index 00000000000..25accd52fa0
--- /dev/null
+++ b/src/devices/bus/c64/c128_comal80.cpp
@@ -0,0 +1,103 @@
+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Commodore 128 COMAL 80 cartridge emulation
+
+**********************************************************************/
+
+#include "c128_comal80.h"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type C128_COMAL80 = &device_creator<c128_comal80_cartridge_device>;
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// c128_comal80_cartridge_device - constructor
+//-------------------------------------------------
+
+c128_comal80_cartridge_device::c128_comal80_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, C128_COMAL80, "C128 COMAL 80 cartridge", tag, owner, clock, "c128_comal80", __FILE__),
+ device_c64_expansion_card_interface(mconfig, *this),
+ m_bank(0)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void c128_comal80_cartridge_device::device_start()
+{
+ // state saving
+ save_item(NAME(m_bank));
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void c128_comal80_cartridge_device::device_reset()
+{
+ m_bank = 0;
+}
+
+
+//-------------------------------------------------
+// c64_cd_r - cartridge data read
+//-------------------------------------------------
+
+UINT8 c128_comal80_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 (!romh)
+ {
+ offs_t addr = ((m_bank & 0x07) << 14) | (offset & 0x3fff);
+ data = m_romh[addr];
+ }
+ else if (!io1)
+ {
+ data = (m_bank << 4) | (data & 0x0f);
+ }
+
+ return data;
+}
+
+
+//-------------------------------------------------
+// c64_cd_w - cartridge data write
+//-------------------------------------------------
+
+void c128_comal80_cartridge_device::c64_cd_w(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2)
+{
+ if (!io1)
+ {
+ /*
+
+ bit description
+
+ 0
+ 1
+ 2
+ 3
+ 4 A14
+ 5 A15
+ 6 A16
+ 7 A17
+
+ */
+
+ m_bank = data >> 4;
+ }
+}