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Diffstat (limited to 'src/devices/cpu/e0c6200/e0c6200.h')
-rw-r--r--src/devices/cpu/e0c6200/e0c6200.h113
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diff --git a/src/devices/cpu/e0c6200/e0c6200.h b/src/devices/cpu/e0c6200/e0c6200.h
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+++ b/src/devices/cpu/e0c6200/e0c6200.h
@@ -0,0 +1,113 @@
+// license:BSD-3-Clause
+// copyright-holders:hap
+/*
+
+ Seiko Epson E0C6200 CPU core and E0C62 MCU family
+
+*/
+
+#ifndef _E0C6200_H_
+#define _E0C6200_H_
+
+#include "emu.h"
+
+
+class e0c6200_cpu_device : public cpu_device
+{
+public:
+ // construction/destruction
+ e0c6200_cpu_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, address_map_constructor program, address_map_constructor data, const char *shortname, const char *source)
+ : cpu_device(mconfig, type, name, tag, owner, clock, shortname, source)
+ , m_program_config("program", ENDIANNESS_BIG, 16, 13, -1, program)
+ , m_data_config("data", ENDIANNESS_BIG, 8, 12, 0, data)
+ { }
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+ // device_execute_interface overrides
+ virtual UINT32 execute_min_cycles() const { return 5; }
+ virtual UINT32 execute_max_cycles() const { return 14; } // longest opcode is 12 cycles, but interrupt service takes up to 14
+ virtual UINT32 execute_input_lines() const { return 1; }
+ virtual void execute_run();
+ virtual void execute_one();
+ virtual bool check_interrupt() { return false; } // nothing to do by default
+ virtual void do_interrupt();
+
+ // device_memory_interface overrides
+ virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const { return(spacenum == AS_PROGRAM) ? &m_program_config : ((spacenum == AS_DATA) ? &m_data_config : NULL); }
+
+ // device_disasm_interface overrides
+ virtual UINT32 disasm_min_opcode_bytes() const { return 2; }
+ virtual UINT32 disasm_max_opcode_bytes() const { return 2; }
+ virtual offs_t disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options);
+ virtual void state_string_export(const device_state_entry &entry, std::string &str);
+
+ address_space_config m_program_config;
+ address_space_config m_data_config;
+ address_space *m_program;
+ address_space *m_data;
+
+ UINT16 m_op;
+ UINT16 m_prev_op;
+ UINT8 m_irq_vector; // low 4 bits for new programcounter after interrupt
+ int m_irq_id; // for standard_irq_callback(id)
+ bool m_possible_irq; // indicates interrupts need to be re-checked
+ bool m_halt; // cpu halt state
+ bool m_sleep; // cpu sleep state
+ int m_icount;
+
+ UINT16 m_pc; // 13-bit programcounter: 1-bit bank, 4-bit page, 8-bit 'step'
+ UINT16 m_prev_pc;
+ UINT16 m_npc; // new bank/page prepared by pset
+ UINT16 m_jpc; // actual bank/page destination for jumps
+
+ // all work registers are 4-bit
+ UINT8 m_a; // accumulator
+ UINT8 m_b; // generic
+ UINT8 m_xp, m_xh, m_xl; // 12-bit index register when combined
+ UINT8 m_yp, m_yh, m_yl; // "
+ UINT8 m_sp; // stackpointer (SPH, SPL)
+ UINT8 m_f; // flags
+
+ // internal data memory read/write
+ inline UINT8 read_mx();
+ inline UINT8 read_my();
+ inline UINT8 read_mn();
+ inline void write_mx(UINT8 data);
+ inline void write_my(UINT8 data);
+ inline void write_mn(UINT8 data);
+
+ // common stack ops
+ inline void push(UINT8 data);
+ inline UINT8 pop();
+ inline void push_pc();
+ inline void pop_pc();
+
+ // misc internal helpers
+ inline void set_cf(UINT8 data);
+ inline void set_zf(UINT8 data);
+ inline void inc_x();
+ inline void inc_y();
+ void do_branch(int condition = 1);
+
+ // opcode handlers
+ UINT8 op_inc(UINT8 x);
+ UINT8 op_dec(UINT8 x);
+ UINT8 op_add(UINT8 x, UINT8 y, int decimal = 0);
+ UINT8 op_adc(UINT8 x, UINT8 y, int decimal = 0);
+ UINT8 op_sub(UINT8 x, UINT8 y, int decimal = 0);
+ UINT8 op_sbc(UINT8 x, UINT8 y, int decimal = 0);
+
+ UINT8 op_and(UINT8 x, UINT8 y);
+ UINT8 op_or(UINT8 x, UINT8 y);
+ UINT8 op_xor(UINT8 x, UINT8 y);
+ UINT8 op_rlc(UINT8 x);
+ UINT8 op_rrc(UINT8 x);
+};
+
+
+
+#endif /* _E0C6200_H_ */