jump.c File Reference

#include "jump.h"
#include "utils.h"

Include dependency graph for jump.c:

Functions
void	_djnz_n (struct z80 *cpu, uint8_t *memory)
	decrements B, then jumps to the provided memory address if B is 0 More...
void	_jr (struct z80 *cpu, uint8_t *memory, int flag, bool n)
	adds n to PC if provided conditions are met More...
void	_jp_nn (struct z80 *cpu, uint8_t *memory)
	jumps to an arbitrary memory address More...
void	_jp_flag_nn (struct z80 *cpu, uint8_t *memory, int flag, bool n)
	jumps to N if provided conditions are met More...
void	_jp_reg (word *reg, struct z80 *cpu)
	jumps to the value stored in reg More...

Detailed Description

Author

Peter H. Ezetta

Function Documentation

_djnz_n()

void _djnz_n	(	struct z80 *	cpu,
		uint8_t *	memory
	)

decrements B, then jumps to the provided memory address if B is 0

Parameters

cpu	z80 CPU object
memory	pointer to allocated memory

_jp_flag_nn()

void _jp_flag_nn	(	struct z80 *	cpu,
		uint8_t *	memory,
		int	flag,
		bool	n
	)

jumps to N if provided conditions are met

Parameters

cpu	z80 CPU object
memory	pointer to allocated block of memory
flag	CPU flag to operate on
n	whether the flag must be set or unset

_jp_flag_nn() will jump to the user provided value from memory in the event that the state of the provided flag matches the provided value of N.

_jp_nn()

void _jp_nn	(	struct z80 *	cpu,
		uint8_t *	memory
	)

jumps to an arbitrary memory address

Parameters

cpu	z80 CPU object
memory	pointer to allocated memory

_jp_reg()

void _jp_reg	(	word *	reg,
		struct z80 *	cpu
	)

jumps to the value stored in reg

Parameters

reg	register containing value to jump to
cpu	z80 cpu object

_jr()

void _jr	(	struct z80 *	cpu,
		uint8_t *	memory,
		int	flag,
		bool	n
	)

adds n to PC if provided conditions are met

Parameters

cpu	z80 CPU object
memory	pointer to allocated block of memory
flag	CPU flag to operate on
n	whether the flag must be set or unset

_jr() will add the user provided value from memory to PC in the event that the state of the provided flag matches the provided value of N.