summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/cpu/upd78k/upd78k2.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/cpu/upd78k/upd78k2.h')
-rw-r--r--src/devices/cpu/upd78k/upd78k2.h116
1 files changed, 116 insertions, 0 deletions
diff --git a/src/devices/cpu/upd78k/upd78k2.h b/src/devices/cpu/upd78k/upd78k2.h
new file mode 100644
index 00000000000..48210a28124
--- /dev/null
+++ b/src/devices/cpu/upd78k/upd78k2.h
@@ -0,0 +1,116 @@
+// license:BSD-3-Clause
+// copyright-holders:AJR
+/**********************************************************************
+
+ NEC 78K/II series 8-bit single-chip microcontrollers
+
+**********************************************************************/
+
+#ifndef MAME_CPU_UPD78K_UPD78K2_H
+#define MAME_CPU_UPD78K_UPD78K2_H
+
+#pragma once
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> upd78k2_device
+
+class upd78k2_device : public cpu_device
+{
+public:
+ enum {
+ UPD78K2_PC,
+ UPD78K2_PSW, UPD78K2_RBS, UPD78K2_SP,
+ UPD78K2_AX, UPD78K2_BC,
+ UPD78K2_DE, UPD78K2_HL,
+ UPD78K2_X, UPD78K2_A, UPD78K2_C, UPD78K2_B,
+ UPD78K2_E, UPD78K2_D, UPD78K2_L, UPD78K2_H
+ };
+
+ // TODO: callbacks and configuration thereof
+
+protected:
+ upd78k2_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, int iram_bits, address_map_constructor mem_map, address_map_constructor sfr_map);
+
+ // device-level overrides
+ virtual void device_start() override ATTR_COLD;
+ virtual void device_reset() override ATTR_COLD;
+
+ // device_execute_interface overrides
+ virtual void execute_run() override;
+ virtual u64 execute_clocks_to_cycles(u64 clocks) const noexcept override { return (clocks + 2 - 1) / 2; }
+ virtual u64 execute_cycles_to_clocks(u64 cycles) const noexcept override { return (cycles * 2); }
+
+ // device_memory_interface overrides
+ virtual space_config_vector memory_space_config() const override;
+
+ // device_state_interface overrides
+ virtual void state_string_export(const device_state_entry &entry, std::string &str) const override;
+
+private:
+ // internal memory map
+ void iram_map(address_map &map) ATTR_COLD;
+
+ // internal helpers
+ inline u8 register_base() const noexcept;
+
+ // address spaces, caches & configuration
+ address_space_config m_program_config;
+ address_space_config m_iram_config;
+ address_space_config m_sfr_config;
+ const offs_t m_iram_addrmask;
+ memory_access<20, 0, 0, ENDIANNESS_LITTLE>::cache m_program_cache;
+ memory_access< 8, 1, 0, ENDIANNESS_LITTLE>::cache m_iram_cache;
+ memory_access<20, 0, 0, ENDIANNESS_LITTLE>::specific m_program_space;
+ memory_access< 8, 1, 0, ENDIANNESS_LITTLE>::specific m_sfr_space;
+
+ // core registers and execution state
+ u16 m_pc;
+ u16 m_ppc;
+ u8 m_psw;
+ u16 m_sp;
+ s32 m_icount;
+};
+
+// ======================> upd78210_device
+
+class upd78210_device : public upd78k2_device
+{
+public:
+ // device type constructor
+ upd78210_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+protected:
+ // device_disasm_interface overrides
+ virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
+
+private:
+ // type-specific internal memory maps
+ void sfr_map(address_map &map) ATTR_COLD;
+};
+
+// ======================> upd78213_device
+
+class upd78213_device : public upd78k2_device
+{
+public:
+ // device type constructor
+ upd78213_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+protected:
+ // device_disasm_interface overrides
+ virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
+
+private:
+ // type-specific internal memory maps
+ void mem_map(address_map &map) ATTR_COLD;
+ void sfr_map(address_map &map) ATTR_COLD;
+};
+
+// device type declarations
+DECLARE_DEVICE_TYPE(UPD78210, upd78210_device)
+DECLARE_DEVICE_TYPE(UPD78213, upd78213_device)
+
+#endif // MAME_CPU_UPD78K_UPD78K2_H