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Diffstat (limited to 'src/devices/bus/c64/easy_calc_result.cpp')
-rw-r--r--src/devices/bus/c64/easy_calc_result.cpp107
1 files changed, 107 insertions, 0 deletions
diff --git a/src/devices/bus/c64/easy_calc_result.cpp b/src/devices/bus/c64/easy_calc_result.cpp
new file mode 100644
index 00000000000..d6a4a6b4cf9
--- /dev/null
+++ b/src/devices/bus/c64/easy_calc_result.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Easy Calc Result cartridge emulation
+
+**********************************************************************/
+
+/*
+
+ PCB Layout
+ ----------
+
+ |===========================|
+ |=| |
+ |=| ROM0 LS73 |
+ |=| |
+ |=| |
+ |=| |
+ |=| |
+ |=| ROM1 LS00 |
+ |=| |
+ |===========================|
+
+ ROM0 - Hitachi HN61364P 8Kx8 EPROM "CR2001"
+ ROM1 - Hitachi HN613128P 16Kx8 EPROM "CR3001"
+
+*/
+
+#include "easy_calc_result.h"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type C64_EASY_CALC_RESULT = &device_creator<c64_easy_calc_result_cartridge_device>;
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// c64_easy_calc_result_cartridge_device - constructor
+//-------------------------------------------------
+
+c64_easy_calc_result_cartridge_device::c64_easy_calc_result_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, C64_EASY_CALC_RESULT, "C64 Easy Calc Result cartridge", tag, owner, clock, "c64_easy_calc_result", __FILE__),
+ device_c64_expansion_card_interface(mconfig, *this)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void c64_easy_calc_result_cartridge_device::device_start()
+{
+ // state saving
+ save_item(NAME(m_bank));
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void c64_easy_calc_result_cartridge_device::device_reset()
+{
+ m_bank = 0;
+}
+
+
+//-------------------------------------------------
+// c64_cd_r - cartridge data read
+//-------------------------------------------------
+
+UINT8 c64_easy_calc_result_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_roml[offset & 0x1fff];
+ }
+ else if (!romh)
+ {
+ data = m_romh[(m_bank << 13) | (offset & 0x1fff)];
+ }
+
+ return data;
+}
+
+
+//-------------------------------------------------
+// c64_cd_w - cartridge data write
+//-------------------------------------------------
+
+void c64_easy_calc_result_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)
+ {
+ m_bank = !BIT(offset, 0);
+ }
+}