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2521
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1 #ifndef I8255_H_
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2 #define I8255_H_
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3
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4 #include <stdint.h>
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5
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6 typedef struct i8255 i8255;
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7 typedef void (*i8255_out_update)(i8255 *ppi, uint32_t cycle, uint32_t port, uint8_t data);
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8 typedef uint8_t (*i8255_in_sample)(i8255 *ppi, uint32_t cycle, uint32_t port);
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9
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10 struct i8255 {
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11 uint8_t latches[4];
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12 uint8_t control;
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13 uint8_t portc_write_mask;
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14 uint8_t portc_out_mask;
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15 i8255_out_update out_handler;
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16 i8255_in_sample in_handler;
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17 void *system;
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18 };
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19
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20 void i8255_init(i8255 *ppi, i8255_out_update out, i8255_in_sample in);
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21 void i8255_write(uint32_t address, i8255 *ppi, uint8_t value, uint32_t cycle);
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22 uint8_t i8255_read(uint32_t address, i8255 *ppi, uint32_t cycle);
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23 void i8255_input_strobe_a(i8255 *ppi, uint8_t value, uint32_t cycle);
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24 void i8255_input_strobe_b(i8255 *ppi, uint8_t value, uint32_t cycle);
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25 uint8_t i8255_output_ack_a(i8255 *ppi, uint32_t cycle);
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26 uint8_t i8255_output_ack_b(i8255 *ppi, uint32_t cycle);
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27
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28 #endif //I8255_H_
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