chip8.c File Reference

#include "chip8.h"
#include "decode.h"
#include "font.h"
#include "private/debug.h"
#include "private/exception.h"
#include "private/util.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

Macros
#define	DEBUG(c)   (c->flags & C8_FLAG_DEBUG)
#define	VERBOSE(c)   (c->flags & C8_FLAG_VERBOSE)
#define	QUIRK_BITWISE(c)
#define	QUIRK_DRAW(c)
#define	QUIRK_LOADSTORE(c)
#define	QUIRK_SHIFT(c)
#define	BORROWS(x, y)   ((((int) x) - y) < 0)
#define	CARRIES(x, y)   ((((int) x) + y) > UINT8_MAX)

Functions
void	c8_deinit (c8_t *c8)
	Deinitialize graphics and free c8. More...
c8_t *	c8_init (const char *path, int flags)
	Initialize and return a c8_t with the given flags. More...
int	c8_load_palette_s (c8_t *c8, char *s)
	Load palette from the given string into colors. More...
int	c8_load_palette_f (c8_t *c8, const char *path)
	Load palette from the given path into colors. More...
void	c8_load_quirks (c8_t *c8, const char *s)
	Load quirk flags from string. More...
void	c8_simulate (c8_t *c8)
	Main interpreter simulation loop. Exits when c8->running is 0. More...

Detailed Description

Stuff for simulating and modifying c8_ts.

Macro Definition Documentation

BORROWS

#define BORROWS	(		x,
			y
	)		((((int) x) - y) < 0)

CARRIES

#define CARRIES	(		x,
			y
	)		((((int) x) + y) > UINT8_MAX)

DEBUG

#define DEBUG

(

c

)

(c->flags & C8_FLAG_DEBUG)

QUIRK_BITWISE

#define QUIRK_BITWISE

(

c

)

Value:

    if (c->flags & C8_FLAG_QUIRK_BITWISE) { \
        c->V[0xF] = 0; \
    }

QUIRK_DRAW

#define QUIRK_DRAW

(

c

)

Value:

    if (c->flags & C8_FLAG_QUIRK_DRAW) { \
        if () \
    }

QUIRK_LOADSTORE

#define QUIRK_LOADSTORE

(

c

)

Value:

    if (c->flags & C8_FLAG_QUIRK_LOADSTORE) { \
        c->I += x + 1; \
    }

QUIRK_SHIFT

#define QUIRK_SHIFT

(

c

)

Value:

    if (c->flags & C8_FLAG_QUIRK_SHIFT) { \
        y = x; \
    }

VERBOSE

#define VERBOSE

(

c

)

(c->flags & C8_FLAG_VERBOSE)

Function Documentation

c8_deinit()

void c8_deinit

(

c8_t *

c8

)

Deinitialize graphics and free c8.

Parameters

c8	c8_t to deinitialize

c8_init()

c8_t * c8_init	(	const char *	path,
		int	flags
	)

Initialize and return a c8_t with the given flags.

This function allocates memory for a new c8_t with all values set to 0 or their default values, adds the font to memory, inititializes the graphics system, and returns a pointer to the c8_t.

Parameters

path	path to ROM file
flags	flags

Returns

pointer to initialized c8_t.

c8_load_palette_f()

int c8_load_palette_f	(	c8_t *	c8,
		const char *	path
	)

Load palette from the given path into colors.

Parameters

c8	where to store the color codes
path	palette file location

Returns

1 if success

c8_load_palette_s()

int c8_load_palette_s	(	c8_t *	c8,
		char *	s
	)

Load palette from the given string into colors.

Parameters

c8	where to store the color codes
s	string to load

Returns

1 if success

c8_load_quirks()

void c8_load_quirks	(	c8_t *	c8,
		const char *	s
	)

Load quirk flags from string.

Parameters

c8	where to store flags
s	string to get quirks from

c8_simulate()

void c8_simulate

(

c8_t *

c8

)

Main interpreter simulation loop. Exits when c8->running is 0.

Parameters

c8	the c8_t to simulate