mirror of
https://github.com/andwati/mos-6502.git
synced 2026-10-18 03:02:51 +00:00
andwati
0dcd2ed687
- Added `state.c` to handle saving and loading the state of the CPU and Bus. - Implemented CRC32 checksum for data integrity verification during state operations. - Enhanced `README.md` in tests/roms to document new test commands for decimal, interrupt, Apple I, and nestest. - Created new test files: `run_apple1.c`, `run_decimal.c`, `run_interrupt.c`, `run_nestest.c`, and `run_vectors.c` to validate the new features. - Updated `run_tests.c` to include tests for state saving/loading and other functionalities. - Introduced `test_vectors.py` to facilitate downloading and running JSON test vectors for opcode verification.
39 lines
839 B
C
39 lines
839 B
C
#ifndef CPU_H
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#define CPU_H
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#include <stdbool.h>
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#include <stdint.h>
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typedef struct Bus6502 Bus6502;
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typedef struct CPU6502 {
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uint8_t A, X, Y;
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uint8_t SP;
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uint16_t PC;
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uint8_t P;
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bool nmi_pending;
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bool irq_asserted;
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bool decimal_enabled;
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} CPU6502;
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enum {
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FLAG_C = 0x01, FLAG_Z = 0x02, FLAG_I = 0x04, FLAG_D = 0x08,
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FLAG_B = 0x10, FLAG_U = 0x20, FLAG_V = 0x40, FLAG_N = 0x80
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};
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typedef enum { CPU_STEP_OK = 0, CPU_STEP_ILLEGAL_OPCODE } cpu_step_status_t;
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typedef struct {
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cpu_step_status_t status;
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uint8_t opcode;
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uint8_t cycles;
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} cpu_step_result_t;
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void cpu_reset(CPU6502 *cpu, Bus6502 *bus);
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cpu_step_result_t cpu_step(CPU6502 *cpu, Bus6502 *bus);
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void cpu_request_nmi(CPU6502 *cpu);
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void cpu_set_irq(CPU6502 *cpu, bool asserted);
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void cpu_print_state(const CPU6502 *cpu);
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#endif
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