z80_toggle_reset(), z80_toggle_busreq()

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

/*
 * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
 *
 * SPDX-License-Identifier:	GPL-2.0
 */
#include "common.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;


void z80_bus_request_or_exit(void);

uint32_t z80_get_busreq_cycles(void);
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);
int z80_stat_halt(void);
void z80_toggle_reset(void);
void z80_toggle_busreq(void);


int32_t z80_memsize_detect(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_P(const FLASH uint8_t *src, uint32_t dest, uint32_t length);
void z80_write_block(const uint8_t *src, uint32_t dest, uint32_t length);
void z80_read_block (uint8_t *dest, uint32_t src, size_t length);


typedef enum fifo_t {
		fifo_msgin, fifo_msgout,
		fifo_conin, fifo_conout,
		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);
int z80_memfifo_getc(const fifo_t f);
uint8_t z80_memfifo_getc_wait(const fifo_t f);
void z80_memfifo_putc(fifo_t f, uint8_t val);

void z80_load_mem(int_fast8_t verbosity, const FLASH unsigned char data[],
										 const FLASH unsigned long *sections,
										 const FLASH unsigned long address[],
										 const FLASH unsigned long length_of_sections[]);