MI_SetMainMemoryPriority

Syntax

#include <nitro/mi.h>

void MI_SetMainMemoryPriority( MIProcessor proc )

Arguments

proc Access priority setting

Return Values

None.

Description

This function sets the priority for access to the main memory. It sets the priority for instances when both ARM9 and ARM7 are accessed simultaneously. The argument proc is in MIProcessor enumeration format and has the following meanings:

MI_PROCESSOR_ARM9 Gives priority to ARM9.
MI_PROCESSOR_ARM7 Gives priority to ARM7.

By default, priority is set to ARM7.

Caution: If you use this function to keep priority to ARM9, then there is a risk that ARM7 will stall and the wireless and sound processes will not behave normally.

Internal Operation

Accesses the EXMEMCNT I/O register (0x4000204).

See Also

MI_GetMainMemoryPriority, MI_DispMemDmaCopy, MI_HBlankDmaCopy

Revision History

2007/05/09 Added a Caution note to the description
2004/08/26 Added MI_DispMemDmaCopy to See Also.
2003/12/25 enum name changed to MIProcessor.
2003/12/18 Initial version.

CONFIDENTIAL