EarthBound/ASM/VRAM DMA Transfer Routines

This is a sub-page of EarthBound/ASM.

$C085B7-$C08615: Batched memory/VRAM transfer

Batched transfers between main memory (ROM/WRAM) and VRAM. Makes the transfers using multiple calls to $C08643 for batches of 0x1200 bytes, with a final transfer of the remainder up to 0x1201 bytes. Before each batch, spins on $7E0099, waiting for the value to become #$0000.

Inputs

• a: Transfer style. Pointer into VRAM DMA Transfer Style Table
• x: Transfer size (bytes)
• y: VRAM address (word)
• $0e..$10: Memory address long pointer

$C0865B-$C0865E: Perform DMA transfer (JSL)

Trivial JSL wrapper around a call to $C0865F.

$C0865F-$C086DD: Perform DMA transfer (JSR)

This page is rather stubbly and could use some expansion. Are you a bad enough dude to rescue this article?