# GXS_LoadBG3Scr

## C Specification

      #include <nitro/gx/gx_load.h>

      void GXS_LoadBG3Scr(const void *pSrc, u32 offset, u32 szByte);

## Arguments

pSrc | Pointer to transfer origin
offset | Offset
szByte | Transfer size (in bytes)

## Return Values

None.

## Description

This function uses DMA to transfer screen data to the BG3 screen data base address in the sub 2D Engine BG-VRAM. An offset can be specified for the transfer destination address. The DMA channel that is used is `GX_DMAID` (defined in `gxcommon.h`). Both `offset` and `szByte` must be 2-byte aligned. The transfer destination address is `(u32)` `G2S_GetBG3ScrPtr()` + `offset`.

Notes: Because the DMA transfer is carried out internally, the transfer source data must be flushed to the main memory using a function such as `DC_FlushRange` prior to the process. If the regions for transfer source and transfer destination overlap, the operation result is not guaranteed.

## See Also

`GXS_LoadBGPltt`, `GXS_LoadBG3Char`

## Revision History

02/09/2004 Initial version.