2023-09-24 22:02:08 -04:00
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#ifndef CPU_OP_H
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#define CPU_OP_H
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// The number associated with each op code is the matching line of the ALU op code.
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// Based on the table here: https://www.nesdev.org/wiki/CPU_unofficial_opcodes
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2023-09-22 14:39:25 -04:00
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enum op_code {
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2023-09-24 22:02:08 -04:00
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OP_CODE_ORA = 0x00,
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OP_CODE_AND = 0x20,
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OP_CODE_EOR = 0x40,
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OP_CODE_ADC = 0x60,
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OP_CODE_STA = 0x80,
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OP_CODE_LDA = 0xa0,
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OP_CODE_CMP = 0xc0,
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OP_CODE_SBC = 0xe0
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2023-09-22 14:39:25 -04:00
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};
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2023-09-24 22:02:08 -04:00
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typedef enum {
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ADDR_MODE_ABSOLUTE, // a
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ADDR_MODE_ABSOLUTE_JUMP, // (a)
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ADDR_MODE_ABSOLUTE_INDEXED_X, // a,x
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ADDR_MODE_ABSOLUTE_INDEXED_Y, // a,y
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ADDR_MODE_ACCUMULATOR, // A
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ADDR_MODE_IMMEDIATE, // #i
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ADDR_MODE_IMPLICIT, // Imp
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ADDR_MODE_INDEXED_INDIRECT, // (d,x)
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ADDR_MODE_INDIRECT_JUMP, //
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ADDR_MODE_INDIRECT_INDEXED, // (d),y
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ADDR_MODE_RELATIVE, // label
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ADDR_MODE_ZERO_PAGE, // d
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ADDR_MODE_ZERO_PAGE_INDEXED_X, // d,x
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ADDR_MODE_ZERO_PAGE_INDEXED_Y, // d,y
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} addr_mode_t;
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#endif
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