Akiko sucks, indeed.
To use it, a 8 longwords (containing 32 chunky pixels) is written to the register. Then the same register is read back the planar data, one bitplane at a time. The CPU must still be used to read the chunky data, feed to the register, read the planar data from the register and write to the chip memory.
Actual true DMA device would have been much more useful.
