mirror of
https://github.com/holub/mame
synced 2025-06-24 05:17:04 +03:00
e720f79481
- Remove irq_line methods from M6502, M6800, M6809, S2600 and replace uses with DEVCB_INPUTLINE - Remove a few IRQ passthroughs from spiders.cpp - Add several aliases for M6800_IRQ_LINE
333 lines
11 KiB
C++
333 lines
11 KiB
C++
// license:BSD-3-Clause
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// copyright-holders:Olivier Galibert
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/***************************************************************************
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m6502.h
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Mostek 6502, original NMOS variant
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***************************************************************************/
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#ifndef __M6502FAM_H__
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#define __M6502FAM_H__
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#define MCFG_M6502_DISABLE_DIRECT() \
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downcast<m6502_device *>(device)->disable_direct();
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#define MCFG_M6502_SYNC_CALLBACK(_cb) \
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devcb = &m6502_device::set_sync_callback(*device, DEVCB_##_cb);
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class m6502_device : public cpu_device {
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public:
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enum {
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IRQ_LINE = INPUT_LINE_IRQ0,
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APU_IRQ_LINE = INPUT_LINE_IRQ1,
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NMI_LINE = INPUT_LINE_NMI,
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V_LINE = INPUT_LINE_IRQ0 + 16
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};
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m6502_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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m6502_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source);
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bool get_sync() const { return sync; }
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void disable_direct() { direct_disabled = true; }
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template<class _Object> static devcb_base &set_sync_callback(device_t &device, _Object object) { return downcast<m6502_device &>(device).sync_w.set_callback(object); }
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devcb_write_line sync_w;
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protected:
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class memory_interface {
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public:
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address_space *program, *sprogram;
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direct_read_data *direct, *sdirect;
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virtual ~memory_interface() {}
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virtual UINT8 read(UINT16 adr) = 0;
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virtual UINT8 read_9(UINT16 adr);
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virtual UINT8 read_sync(UINT16 adr) = 0;
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virtual UINT8 read_arg(UINT16 adr) = 0;
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virtual void write(UINT16 adr, UINT8 val) = 0;
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virtual void write_9(UINT16 adr, UINT8 val);
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};
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class mi_default_normal : public memory_interface {
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public:
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virtual ~mi_default_normal() {}
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virtual UINT8 read(UINT16 adr) override;
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virtual UINT8 read_sync(UINT16 adr) override;
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virtual UINT8 read_arg(UINT16 adr) override;
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virtual void write(UINT16 adr, UINT8 val) override;
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};
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class mi_default_nd : public mi_default_normal {
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public:
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virtual ~mi_default_nd() {}
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virtual UINT8 read_sync(UINT16 adr) override;
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virtual UINT8 read_arg(UINT16 adr) override;
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};
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struct disasm_entry {
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const char *opcode;
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int mode;
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offs_t flags;
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};
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enum {
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STATE_RESET = 0xff00
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};
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enum {
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DASM_non, /* no additional arguments */
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DASM_aba, /* absolute */
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DASM_abx, /* absolute + X */
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DASM_aby, /* absolute + Y */
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DASM_acc, /* accumulator */
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DASM_adr, /* absolute address (jmp,jsr) */
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DASM_bzp, /* zero page with bit selection */
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DASM_iax, /* indirect + X (65c02 jmp) */
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DASM_idx, /* zero page pre indexed */
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DASM_idy, /* zero page post indexed */
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DASM_idz, /* zero page post indexed (65ce02) */
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DASM_imm, /* immediate */
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DASM_imp, /* implicit */
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DASM_ind, /* indirect (jmp) */
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DASM_isy, /* zero page pre indexed sp and post indexed Y (65ce02) */
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DASM_iw2, /* immediate word (65ce02) */
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DASM_iw3, /* augment (65ce02) */
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DASM_rel, /* relative */
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DASM_rw2, /* relative word (65cs02, 65ce02) */
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DASM_zpb, /* zero page and branch (65c02 bbr, bbs) */
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DASM_zpg, /* zero page */
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DASM_zpi, /* zero page indirect (65c02) */
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DASM_zpx, /* zero page + X */
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DASM_zpy, /* zero page + Y */
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DASM_imz, /* load immediate byte, store to zero page address (M740) */
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DASM_spg, /* "special page": implied FF00 OR immediate value (M740)*/
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DASM_biz, /* bit, zero page (M740) */
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DASM_bzr, /* bit, zero page, relative offset (M740) */
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DASM_bar, /* bit, accumulator, relative offset (M740) */
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DASM_bac /* bit, accumulator (M740) */
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};
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enum {
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F_N = 0x80,
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F_V = 0x40,
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F_E = 0x20, // 65ce02
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F_T = 0x20, // M740: replaces A with $00,X in some opcodes when set
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F_B = 0x10,
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F_D = 0x08,
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F_I = 0x04,
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F_Z = 0x02,
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F_C = 0x01
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};
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virtual void init();
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// device-level overrides
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virtual void device_start() override;
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virtual void device_reset() override;
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// device_execute_interface overrides
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virtual UINT32 execute_min_cycles() const override;
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virtual UINT32 execute_max_cycles() const override;
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virtual UINT32 execute_input_lines() const override;
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virtual void execute_run() override;
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virtual void execute_set_input(int inputnum, int state) override;
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// device_memory_interface overrides
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virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const override;
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// device_state_interface overrides
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virtual void state_import(const device_state_entry &entry) override;
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virtual void state_export(const device_state_entry &entry) override;
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virtual void state_string_export(const device_state_entry &entry, std::string &str) const override;
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// device_disasm_interface overrides
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virtual UINT32 disasm_min_opcode_bytes() const override;
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virtual UINT32 disasm_max_opcode_bytes() const override;
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virtual offs_t disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options) override;
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address_space_config program_config, sprogram_config;
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UINT16 PPC; /* previous program counter */
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UINT16 NPC; /* next start-of-instruction program counter */
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UINT16 PC; /* program counter */
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UINT16 SP; /* stack pointer (always 100 - 1FF) */
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UINT16 TMP; /* temporary internal values */
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UINT8 TMP2; /* another temporary internal value, 8 bits this time */
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UINT8 A; /* Accumulator */
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UINT8 X; /* X index register */
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UINT8 Y; /* Y index register */
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UINT8 P; /* Processor status */
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UINT8 IR; /* Prefetched instruction register */
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int inst_state_base; /* Current instruction bank */
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memory_interface *mintf;
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int inst_state, inst_substate;
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int icount;
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bool nmi_state, irq_state, apu_irq_state, v_state;
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bool irq_taken, sync, direct_disabled, inhibit_interrupts;
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static const disasm_entry disasm_entries[0x100];
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offs_t disassemble_generic(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options, const disasm_entry *table);
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UINT8 read(UINT16 adr) { return mintf->read(adr); }
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UINT8 read_9(UINT16 adr) { return mintf->read_9(adr); }
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void write(UINT16 adr, UINT8 val) { mintf->write(adr, val); }
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void write_9(UINT16 adr, UINT8 val) { mintf->write_9(adr, val); }
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UINT8 read_arg(UINT16 adr) { return mintf->read_arg(adr); }
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UINT8 read_pc() { return mintf->read_arg(PC++); }
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UINT8 read_pc_noinc() { return mintf->read_arg(PC); }
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void prefetch();
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void prefetch_noirq();
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void set_nz(UINT8 v);
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virtual void do_exec_full();
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virtual void do_exec_partial();
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// inline helpers
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static inline bool page_changing(UINT16 base, int delta) { return ((base + delta) ^ base) & 0xff00; }
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static inline UINT16 set_l(UINT16 base, UINT8 val) { return (base & 0xff00) | val; }
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static inline UINT16 set_h(UINT16 base, UINT8 val) { return (base & 0x00ff) | (val << 8); }
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inline void dec_SP() { SP = set_l(SP, SP-1); }
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inline void inc_SP() { SP = set_l(SP, SP+1); }
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void do_adc_d(UINT8 val);
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void do_adc_nd(UINT8 val);
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void do_sbc_d(UINT8 val);
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void do_sbc_nd(UINT8 val);
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void do_arr_d();
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void do_arr_nd();
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void do_adc(UINT8 val);
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void do_cmp(UINT8 val1, UINT8 val2);
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void do_sbc(UINT8 val);
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void do_bit(UINT8 val);
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void do_arr();
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UINT8 do_asl(UINT8 v);
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UINT8 do_lsr(UINT8 v);
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UINT8 do_ror(UINT8 v);
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UINT8 do_rol(UINT8 v);
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UINT8 do_asr(UINT8 v);
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#define O(o) void o ## _full(); void o ## _partial()
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// NMOS 6502 opcodes
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// documented opcodes
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O(adc_aba); O(adc_abx); O(adc_aby); O(adc_idx); O(adc_idy); O(adc_imm); O(adc_zpg); O(adc_zpx);
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O(and_aba); O(and_abx); O(and_aby); O(and_imm); O(and_idx); O(and_idy); O(and_zpg); O(and_zpx);
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O(asl_aba); O(asl_abx); O(asl_acc); O(asl_zpg); O(asl_zpx);
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O(bcc_rel);
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O(bcs_rel);
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O(beq_rel);
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O(bit_aba); O(bit_zpg);
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O(bmi_rel);
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O(bne_rel);
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O(bpl_rel);
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O(brk_imp);
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O(bvc_rel);
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O(bvs_rel);
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O(clc_imp);
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O(cld_imp);
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O(cli_imp);
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O(clv_imp);
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O(cmp_aba); O(cmp_abx); O(cmp_aby); O(cmp_idx); O(cmp_idy); O(cmp_imm); O(cmp_zpg); O(cmp_zpx);
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O(cpx_aba); O(cpx_imm); O(cpx_zpg);
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O(cpy_aba); O(cpy_imm); O(cpy_zpg);
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O(dec_aba); O(dec_abx); O(dec_zpg); O(dec_zpx);
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O(dex_imp);
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O(dey_imp);
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O(eor_aba); O(eor_abx); O(eor_aby); O(eor_idx); O(eor_idy); O(eor_imm); O(eor_zpg); O(eor_zpx);
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O(inc_aba); O(inc_abx); O(inc_zpg); O(inc_zpx);
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O(inx_imp);
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O(iny_imp);
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O(jmp_adr); O(jmp_ind);
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O(jsr_adr);
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O(lda_aba); O(lda_abx); O(lda_aby); O(lda_idx); O(lda_idy); O(lda_imm); O(lda_zpg); O(lda_zpx);
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O(ldx_aba); O(ldx_aby); O(ldx_imm); O(ldx_zpg); O(ldx_zpy);
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O(ldy_aba); O(ldy_abx); O(ldy_imm); O(ldy_zpg); O(ldy_zpx);
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O(lsr_aba); O(lsr_abx); O(lsr_acc); O(lsr_zpg); O(lsr_zpx);
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O(nop_imp);
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O(ora_aba); O(ora_abx); O(ora_aby); O(ora_imm); O(ora_idx); O(ora_idy); O(ora_zpg); O(ora_zpx);
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O(pha_imp);
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O(php_imp);
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O(pla_imp);
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O(plp_imp);
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O(rol_aba); O(rol_abx); O(rol_acc); O(rol_zpg); O(rol_zpx);
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O(ror_aba); O(ror_abx); O(ror_acc); O(ror_zpg); O(ror_zpx);
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O(rti_imp);
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O(rts_imp);
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O(sbc_aba); O(sbc_abx); O(sbc_aby); O(sbc_idx); O(sbc_idy); O(sbc_imm); O(sbc_zpg); O(sbc_zpx);
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O(sec_imp);
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O(sed_imp);
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O(sei_imp);
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O(sta_aba); O(sta_abx); O(sta_aby); O(sta_idx); O(sta_idy); O(sta_zpg); O(sta_zpx);
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O(stx_aba); O(stx_zpg); O(stx_zpy);
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O(sty_aba); O(sty_zpg); O(sty_zpx);
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O(tax_imp);
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O(tay_imp);
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O(tsx_imp);
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O(txa_imp);
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O(txs_imp);
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O(tya_imp);
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// exceptions
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O(reset);
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// undocumented reliable instructions
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O(dcp_aba); O(dcp_abx); O(dcp_aby); O(dcp_idx); O(dcp_idy); O(dcp_zpg); O(dcp_zpx);
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O(isb_aba); O(isb_abx); O(isb_aby); O(isb_idx); O(isb_idy); O(isb_zpg); O(isb_zpx);
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O(lax_aba); O(lax_aby); O(lax_idx); O(lax_idy); O(lax_zpg); O(lax_zpy);
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O(rla_aba); O(rla_abx); O(rla_aby); O(rla_idx); O(rla_idy); O(rla_zpg); O(rla_zpx);
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O(rra_aba); O(rra_abx); O(rra_aby); O(rra_idx); O(rra_idy); O(rra_zpg); O(rra_zpx);
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O(sax_aba); O(sax_idx); O(sax_zpg); O(sax_zpy);
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O(sbx_imm);
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O(sha_aby); O(sha_idy);
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O(shs_aby);
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O(shx_aby);
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O(shy_abx);
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O(slo_aba); O(slo_abx); O(slo_aby); O(slo_idx); O(slo_idy); O(slo_zpg); O(slo_zpx);
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O(sre_aba); O(sre_abx); O(sre_aby); O(sre_idx); O(sre_idy); O(sre_zpg); O(sre_zpx);
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// undocumented unreliable instructions
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// behaviour differs between visual6502 and online docs, which
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// is a clear sign reliability is not to be expected
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// implemented version follows visual6502
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O(anc_imm);
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O(ane_imm);
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O(arr_imm);
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O(asr_imm);
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O(las_aby);
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O(lxa_imm);
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// nop variants
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O(nop_imm); O(nop_aba); O(nop_abx); O(nop_zpg); O(nop_zpx);
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// system killers
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O(kil_non);
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#undef O
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};
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enum {
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M6502_PC = 1,
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M6502_A,
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M6502_X,
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M6502_Y,
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M6502_P,
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M6502_S,
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M6502_IR
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};
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enum {
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M6502_IRQ_LINE = m6502_device::IRQ_LINE,
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M6502_NMI_LINE = m6502_device::NMI_LINE,
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M6502_SET_OVERFLOW = m6502_device::V_LINE
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};
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extern const device_type M6502;
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#endif
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