1 files changed, 60 insertions, 0 deletions
diff --git a/emu/6502.h b/emu/6502.h
new file mode 100644
index 0000000..1af25bc
--- /dev/null
+++ b/emu/6502.h
@@ -0,0 +1,60 @@
+#ifndef CPU_6502_H
+#define CPU_6502_H
+
+#include <inttypes.h>
+#include <stdbool.h>
+
+typedef struct
+{
+	uint8_t A;
+	uint8_t X;
+	uint8_t Y;
+	uint8_t SP;
+	uint16_t PC;
+	uint8_t PS;
+	
+	struct memory_t *memory;
+	
+	bool debug;
+} cpu_6502_t;
+
+enum {
+	PS_N = 0x80,
+	PS_V = 0x40,
+	PS_B = 0x10,
+	PS_D = 0x08,
+	PS_I = 0x04,
+	PS_Z = 0x02,
+	PS_C = 0x01
+};
+
+enum {
+	LDX_IMM = 0xA2,
+	LDX_ZERO = 0xA6,
+	LDY_IMM = 0xA0,
+	LDY_ZERO = 0xA4,
+	LDA_IMM = 0xA9,
+	LDA_ZERO = 0xA5,
+	JMP_ABS = 0x4C,
+	JSR_ABS = 0x20,
+	RTS_IMPL = 0x60,
+	TXS_IMPL = 0x9A
+};
+
+void cpu_6502_init( cpu_6502_t *cpu, struct memory_t *memory );
+void cpu_6502_reset( cpu_6502_t *cpu );
+uint8_t cpu_6502_read_byte( cpu_6502_t *cpu, uint16_t addr );
+uint16_t cpu_6502_read_word( cpu_6502_t *cpu, uint16_t addr );
+void cpu_6502_write_byte( cpu_6502_t *cpu, uint16_t addr, uint8_t data );
+void cpu_6502_push_byte( cpu_6502_t *cpu, uint8_t data );
+void cpu_6502_push_word( cpu_6502_t *cpu, uint16_t data );
+uint8_t cpu_6502_pop_byte( cpu_6502_t *cpu );
+uint16_t cpu_6502_pop_word( cpu_6502_t *cpu );
+void cpu_6502_run( cpu_6502_t *cpu );
+void cpu_6502_print_state( cpu_6502_t *cpu, uint8_t opcode );
+void cpu_6502_print_memory( cpu_6502_t *cpu, uint16_t base, uint8_t size );
+void cpu_6502_print_stack( cpu_6502_t *cpu );
+void cpu_6502_print_zerop_page( cpu_6502_t *cpu );
+void cpu_6502_step( cpu_6502_t *cpu );
+
+#endif