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// license:BSD-3-Clause
// copyright-holders:Raphael Nabet
/* register names for apexc_get_reg & apexc_set_reg */
#ifndef MAME_CPU_APEXC_APEXC_H
#define MAME_CPU_APEXC_APEXC_H
#pragma once
enum
{
APEXC_CR =1, /* control register */
APEXC_A, /* accumulator */
APEXC_R, /* register */
APEXC_ML, /* memory location */
APEXC_WS, /* working store */
APEXC_STATE, /* whether CPU is running */
};
class apexc_cpu_device : public cpu_device
{
public:
// construction/destruction
apexc_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
// configuration
auto tape_read() { return m_tape_read_cb.bind(); }
auto tape_punch() { return m_tape_punch_cb.bind(); }
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// device_execute_interface overrides
virtual uint32_t execute_min_cycles() const noexcept override { return 2; }
virtual uint32_t execute_max_cycles() const noexcept override { return 75; }
virtual uint32_t execute_input_lines() const noexcept override { return 0; }
virtual void execute_run() override;
// device_memory_interface overrides
virtual space_config_vector memory_space_config() const override;
// device_state_interface overrides
virtual void state_import(const device_state_entry &entry) override;
// device_disasm_interface overrides
virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
inline uint32_t apexc_readmem(uint32_t address) { return m_program->read_dword((address)<<2); }
inline void apexc_writemem(uint32_t address, uint32_t data) { m_program->write_dword((address)<<2, (data)); }
inline void apexc_writemem_masked(uint32_t address, uint32_t data, uint32_t mask) { apexc_writemem((address), (apexc_readmem(address) & ~(mask)) | ((data) & (mask))); }
uint32_t effective_address(uint32_t address);
uint32_t word_read(uint32_t address, uint32_t special);
void word_write(uint32_t address, uint32_t data, uint32_t mask);
uint8_t papertape_read();
void papertape_punch(uint8_t data);
uint32_t load_ml(uint32_t address, uint32_t vector);
void execute();
address_space_config m_program_config;
devcb_read8 m_tape_read_cb;
devcb_write8 m_tape_punch_cb;
uint32_t m_a; /* accumulator */
uint32_t m_r; /* register */
uint32_t m_cr; /* control register (i.e. instruction register) */
int m_ml; /* memory location (current track in working store, and requested word position within track) (10 bits) */
int m_working_store; /* current working store (group of 16 tracks) (1-15) */
int m_current_word; /* current word position within track (0-31) */
int m_running; /* 1 flag: */
/* running: flag implied by the existence of the stop instruction */
uint32_t m_pc; /* address of next instruction for the disassembler */
address_space *m_program;
int m_icount;
// For state
uint32_t m_ml_full;
uint32_t m_genpc;
};
DECLARE_DEVICE_TYPE(APEXC, apexc_cpu_device)
#endif // MAME_CPU_APEXC_APEXC_H
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