bios.h File Reference

Nintendo DS Bios functions. More...

#include "nds/ndstypes.h"

Functions
void	swiCopy (const void *source, void *dest, int flags)
void	swiDelay (uint32 duration)
	delay
int	swiDivide (int numerator, int divisor)
void	swiDivMod (int numerator, int divisor, int *result, int *remainder)
void	swiFastCopy (const void *source, void *dest, int flags)
int	swiRemainder (int numerator, int divisor)
void	swiSoftReset (void)
	reset the DS.
void	swiWaitForIRQ (void)
	wait for any interrupt

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Detailed Description

Nintendo DS Bios functions.

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Function Documentation

swiCopy	(	const void *	source,
		void *	dest,
		int	flags
	)

Parameters:

	source	pointer to transfer source
	dest	dest = pointer to transfer destination
	flags	copy mode and size flags(26) = transfer width (0: halfwords, 1: words) flags(24) = transfer mode (0: copy, 1: fill) flags(20..0) = transfer count (always in words)

Examples:

Graphics/Sprites/allocation_test/source/main.c.

swiDelay

(

uint32

duration

)

delay

Delays for for a period X + Y*duration where X is the swi overhead and Y is a cycle of

     loop:
       sub r0, #1
       bgt loop

of thumb fetches in BIOS memory

Parameters:

duration

length of delay

Note:

Duration should be 1 or more, a duration of 0 is a huge delay

int swiDivide	(	int	numerator,
		int	divisor
	)

Parameters:

	numerator	signed integer to divide
	divisor	signed integer to divide by

Returns:

numerator / divisor

void swiDivMod	(	int	numerator,
		int	divisor,
		int *	result,
		int *	remainder
	)

Parameters:

	numerator	signed integer to divide
	divisor	signed integer to divide by
	result	pointer to integer set to numerator / divisor
	remainder	pointer to integer set to numerator % divisor

swiFastCopy	(	const void *	source,
		void *	dest,
		int	flags
	)

Parameters:

	source	pointer to transfer source
	dest	dest = pointer to transfer destination
	flags	copy mode and size flags(24) = transfer mode (0: copy, 1: fill) flags(20..0) = transfer count (in words)

Note:

Transfers more quickly than swiCopy, but has higher interrupt latency

int swiRemainder	(	int	numerator,
		int	divisor
	)

Parameters:

	numerator	signed integer to divide
	divisor	signed integer to divide by

Returns:

numerator % divisor

swiWaitForIRQ

(

void

)

wait for any interrupt

Note:

ARM9 exclusive