Stripe Image Uploader. Uses $00-$02 as a 24-bit pointer to tile data. See this thread how the stripe image format works. Must be run during a blank, usually NMI.
To call from a custom routine, do this:
- Store stripe image pointer (24-bit) to $00-$02
- Push 24-bit return address (bank -> mid -> lo)
- PHB : LDA #$00 : PHA : PLB
- PEA $84CD
- JSL $00871E