mirror of
https://github.com/rkujawa/rk65c02.git
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61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
#ifndef _INSTRUCTION_H_
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#define _INSTRUCTION_H_
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#include "rk65c02.h"
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typedef enum {
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IMPLIED,
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IMMEDIATE,
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ZP,
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ZPX,
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ZPY,
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IZP,
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IZPX,
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IZPY,
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ZPR,
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RELATIVE,
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ABSOLUTE,
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ABSOLUTEX,
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ABSOLUTEY,
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IABSOLUTE,
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IABSOLUTEX,
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ACCUMULATOR
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} addressing_t;
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struct instruction {
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uint8_t opcode;
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uint8_t op1;
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uint8_t op2;
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};
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typedef struct instruction instruction_t;
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struct instrdef {
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uint8_t opcode; /* opcode, normally same as in instruction */
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const char *mnemonic;
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addressing_t mode;
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uint8_t size;
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void (*emul)(rk65c02emu_t *e, void *id, instruction_t *i);
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bool modify_pc;
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};
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typedef struct instrdef instrdef_t;
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instruction_t instruction_fetch(bus_t *, uint16_t);
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instrdef_t instruction_decode(uint8_t);
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void instruction_print(instruction_t *);
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char * instruction_string_get(instruction_t *);
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void disassemble(bus_t *, uint16_t);
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uint8_t instruction_data_read_1(rk65c02emu_t *, instrdef_t *, instruction_t *);
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void instruction_data_write_1(rk65c02emu_t *, instrdef_t *, instruction_t *, uint8_t);
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uint16_t instruction_data_address(rk65c02emu_t *e, instrdef_t *id, instruction_t *i);
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void instruction_status_adjust_zero(rk65c02emu_t *, uint8_t);
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void instruction_status_adjust_negative(rk65c02emu_t *, uint8_t);
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void stack_push(rk65c02emu_t *, uint8_t);
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uint8_t stack_pop(rk65c02emu_t *);
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void program_counter_increment(rk65c02emu_t *, instrdef_t *);
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bool instruction_modify_pc(instrdef_t *);
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void program_counter_branch(rk65c02emu_t *, int8_t);
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#endif /* _INSTRUCTION_H_ */
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