z80.h File Reference

z80 CPU data structure and functions More...

#include <stdint.h>
#include "bus.h"

Include dependency graph for z80.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures
union	word
	type to deal with endianness and access of high/low bits More...
struct	z80

Macros
#define	INIT_PC   0x0000
	initial value of the PC register
#define	INTERRUPT_PERIOD   10240
	number of cycles to run before triggering interrupt
#define	CARRY   0
	bit position of CARRY flag
#define	SUBTRACT   1
	bit position of SUBTRACT flag
#define	PARITY_OVERFLOW   2
	bit position of OVERFLOW flag
#define	F3   3
	bit position of F3 flag
#define	HALF_CARRY   4
	bit position of HALF CARRY flag
#define	F5   5
	bit position of F5 flag
#define	ZERO   6
	bit position of ZERO flag
#define	SIGN   7
	bit position of SIGN flag

Enumerations
enum	interrupt_mode { IM0, IM1, IM2 }
	enum to contain all possible interrupt modes More...

Functions
__BEGIN_DECLS struct z80 *	new_cpu (void)
void	reset_cpu (struct z80 *)
int	run (struct z80 *, uint8_t *, long, bool)

Detailed Description

z80 CPU data structure and functions

Author

Peter H. Ezetta

Enumeration Type Documentation

interrupt_mode

enum interrupt_mode

enum to contain all possible interrupt modes

Enumerator
IM0	Interrupt Mode 0
IM1	Interrupt Mode 1
IM2	Interrupt Mode 2

Function Documentation

new_cpu()

__BEGIN_DECLS struct z80* new_cpu

(

void

)

Fills out a new z80 CPU struct

Returns

A z80 struct

reset_cpu()

void reset_cpu

(

struct z80 *

cpu

)

Triggers the reset state on the z80 CPU

Parameters

cpu	A z80 struct to reset.

run()

int run	(	struct z80 *	cpu,
		uint8_t *	memory,
		long	runcycles,
		bool	s_flag
	)

Runs the cpu

Parameters

cpu	A z80 cpu struct to run.
memory	An allocated block of memory to pass to the cpu.
runcycles	The number of clock cycles to run the cpu.
s_flag	Enable running in step mode

Returns

Count of cycles executed.

Here is the call graph for this function: