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cpu16: Add preliminary execution core

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This commit is contained in:
AJR 2022-05-16 20:51:44 -04:00
parent cfabb19983
commit bac956e998
3 changed files with 5941 additions and 40 deletions
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1
src/devices/bus/nscsi/cfp1080s.cpp
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@ -36,6 +36,7 @@ void cfp1080s_device::device_start()
void cfp1080s_device::mem_map(address_map &map) void cfp1080s_device::mem_map(address_map &map)
{ {
map(0x00000, 0x1ffff).rom().region("firmware", 0); map(0x00000, 0x1ffff).rom().region("firmware", 0);
map(0xff081, 0xff081).lr8(NAME([]() { return 0x80; })); // status register of some peripheral
} }
void cfp1080s_device::device_add_mconfig(machine_config &config) void cfp1080s_device::device_add_mconfig(machine_config &config)

5924
src/devices/cpu/m68hc16/cpu16.cpp
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File diff suppressed because it is too large Load Diff

48
src/devices/cpu/m68hc16/cpu16.h
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@ -33,6 +33,8 @@ protected:
virtual void device_reset() override; virtual void device_reset() override;
// device_execute_interface overrides // device_execute_interface overrides
virtual u32 execute_min_cycles() const noexcept override { return 2; }
virtual u32 execute_max_cycles() const noexcept override { return 2; }
virtual void execute_run() override; virtual void execute_run() override;
virtual void execute_set_input(int inputnum, int state) override; virtual void execute_set_input(int inputnum, int state) override;
@ -46,12 +48,46 @@ protected:
virtual void state_string_export(const device_state_entry &entry, std::string &str) const override; virtual void state_string_export(const device_state_entry &entry, std::string &str) const override;
private: private:
enum class seq : u16;
static const seq s_inst_decode[4][256];
// register helpers // register helpers
void debug_set_pcbase(u32 value); void debug_set_pcbase(u32 value);
void debug_set_pc(u32 value); void set_pc(u32 value) noexcept;
void debug_set_ccr(u16 value); void debug_set_ccr(u16 value);
u16 get_k() noexcept; u16 get_k() noexcept;
void set_k(u16 value) noexcept; void set_k(u16 value) noexcept;
u16 get_ix(int which) const noexcept;
void set_ix(int which, u16 value) noexcept;
u8 get_xk(int which) const noexcept;
void set_xk(int which, u8 value) noexcept;
void set_a(u8 value) noexcept;
void set_b(u8 value) noexcept;
// arithmetic and condition code helpers
void set_nzv8(u8 data, bool v) noexcept;
void set_nzv16(u16 data, bool v) noexcept;
void set_z16(u16 data) noexcept;
u8 adc8(u8 data1, u8 data2, bool cin) noexcept;
u8 sbc8(u8 data1, u8 data2, bool cin) noexcept;
u16 adc16(u16 data1, u16 data2, bool cin) noexcept;
u16 sbc16(u16 data1, u16 data2, bool cin) noexcept;
u8 rol8(u8 data, bool cin) noexcept;
u16 rol16(u16 data, bool cin) noexcept;
u8 ror8(u8 data, bool cin) noexcept;
u16 ror16(u16 data, bool cin) noexcept;
u8 asr8(u8 data) noexcept;
u16 asr16(u16 data) noexcept;
void mulu8() noexcept;
void mulu16() noexcept;
void muls16(bool frac) noexcept;
void divu16(bool frac) noexcept;
// misc. execution helpers
void advance() noexcept;
void pshm_step(int n);
void pulm_step(int n);
bool cc_test(u8 cc) const noexcept;
// address spaces // address spaces
address_space_config m_program_config; address_space_config m_program_config;
@ -67,8 +103,7 @@ private:
u16 m_d; u16 m_d;
u16 m_e; u16 m_e;
u8 m_ek; u8 m_ek;
u32 m_index_regs[3]; u32 m_index_regs[4];
u32 m_sp;
// MAC registers // MAC registers
u16 m_hr; u16 m_hr;
@ -78,6 +113,10 @@ private:
u8 m_index_mask[2]; u8 m_index_mask[2];
// misc. state // misc. state
seq m_sequence;
u32 m_ea;
u16 m_tmp;
bool m_start;
s32 m_icount; s32 m_icount;
}; };
@ -86,6 +125,9 @@ class mc68hc16z1_device : public cpu16_device
public: public:
// device type constructor // device type constructor
mc68hc16z1_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); mc68hc16z1_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
private:
void internal_map(address_map &map);
}; };
// device type declaration // device type declaration