hblankcpy.h File Reference

#include <stdint.h>

Go to the source code of this file.

Functions
void	hblank_copy_vram (const uint8_t *sour, uint8_t count)
void	hblank_cpy_vram (const uint8_t *sour, uint8_t count)
void	hblank_copy (uint8_t *dest, const uint8_t *sour, uint16_t size)

Variables
uint8_t *	hblank_copy_destination

Function Documentation

hblank_copy_vram()

void hblank_copy_vram	(	const uint8_t *	sour,
		uint8_t	count
	)

HBlank stack copy routine

Parameters

sour	Source address to copy from
count	Number of 16 byte chunks to copy

Performs the required STAT_REG, IE_REG, IF_REG manipulation when called and restores STAT_REG and IE_REG on exit (unlike hblank_cpy_vram()).

Before calling:

• Set the destination using hblank_copy_destination
• Interrupts must be disabled

See also

hblank_cpy_vram, hblank_copy_destination, hblank_copy

hblank_cpy_vram()

void hblank_cpy_vram	(	const uint8_t *	sour,
		uint8_t	count
	)

HBlank stack copy routine

Parameters

sour	Source address to copy from
count	Number of 16 byte chunks to copy

Unlike hblank_copy_vram() does not perform the required STAT_REG, IE_REG, IF_REG manipulation, nor does it restore STAT_REG and IE_REG on exit.

Before calling:

• Set the destination using hblank_copy_destination
• Interrupts must be properly configured
• Interrupts must be disabled

See also

hblank_copy_vram, hblank_copy_destination, hblank_copy

hblank_copy()

void hblank_copy ( uint8_t *  dest, const uint8_t *  sour, uint16_t  size  )

inline

HBlank stack copy routine (must be called with interrupts disabled!)

Parameters

dest	destination pointer
sour	source pointer
size	number of bytes to copy (rounded to 16-byte chunks)

Performs a fast vram safe copy of data during HBlank.

Variable Documentation

hblank_copy_destination

uint8_t* hblank_copy_destination

extern

Destination address for hblank copy routine