view blastem.h @ 75:108e587165c0

Implement DMA (untested)
author Mike Pavone <pavone@retrodev.com>
date Fri, 21 Dec 2012 20:56:32 -0800
parents 7a22a0e6c004
children 209a37eed3e7
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#ifndef BLASTEM_H_
#define BLASTEM_H_

#include <stdint.h>

typedef struct {
	uint32_t th_counter;
	uint32_t timeout_cycle;
	uint8_t output;
	uint8_t control;
	uint8_t input[3];
} io_port;

#define GAMEPAD_TH0 0
#define GAMEPAD_TH1 1
#define GAMEPAD_EXTRA 2

extern io_port gamepad_1;
extern io_port gamepad_2;

void io_adjust_cycles(io_port * pad, uint32_t current_cycle, uint32_t deduction);
uint16_t read_dma_value(uint32_t address);

#endif //BLASTEM_H_