User Timer1 as Z180 Clock

[z180-stamp.git] / include / z80-if.h

#define ZST_ACQUIRED	0x01
#define ZST_RUNNING	0x02

typedef enum { 
	RESET		= 0x00,
	RESET_AQRD	= ZST_ACQUIRED,
	RUNNING		= ZST_RUNNING,
	RUNNING_AQRD	= ZST_RUNNING | ZST_ACQUIRED,
} zstate_t;

typedef enum { 
	Reset,
	Request,
	Release,
	Run,
	Restart,
	M_Cycle
} bus_cmd_t;

typedef enum {LOW, HIGH} level_t;

zstate_t z80_bus_state(void);
zstate_t z80_bus_cmd(bus_cmd_t cmd);
void z80_setup_bus(void);
int z80_stat_reset(void);
//void z80_busreq(level_t level);
int z80_stat_halt(void);

void z80_write(uint32_t addr, uint8_t data);
uint8_t z80_read(uint32_t addr);
void z80_memset(uint32_t addr, uint8_t data, uint32_t length);
void z80_write_block(const FLASH uint8_t *src, uint32_t dest, uint32_t length);


typedef enum fifo_t {fifo_in, fifo_out, NUM_FIFOS} fifo_t;

void z80_memfifo_init(const fifo_t f, uint32_t adr);
int z80_memfifo_is_empty(const fifo_t f);
int z80_memfifo_is_full(const fifo_t f);
uint8_t z80_memfifo_getc(const fifo_t f);
void z80_memfifo_putc(fifo_t f, uint8_t val);

void z80_setup_msg_fifo(void);
void z80_init_msg_fifo(uint32_t addr);
int z80_msg_fifo_getc(void);