Function

nuPiReadRom

Syntax

void nuPiReadRom(u32 rom_addr, void* buf_ptr, u32 size)

Arguments

rom_addr      transfer origin(from) ROM address 
buf_ptr       transfer destination(to) buffer pointer 
size          transfer size

Return Value

None

Description

Reads data from ROM

Uses the PI to DMA transfer data from Game Pak ROM into RDRAM. The transfer origin(from) ROM address "rom_addr" must be 2-byte aligned. The pointer to the transfer destination buffer "buf_ptr" must be 8-byte aligned.

While transferring a large amount of data using PI-DMA, it is possible that the necessary data cannot be transferred for audio playback during that period, causing noise in the audio. Therefore, when the amount of data to be transferred at one time is greater than 16,384 bytes, perform processing within the function so that it is divided into 16,384 byte units.

See Also

nuPiInit

Revision History

2/1/99 Added description of divided transfer