* This command will operate without Kanji ROM.
* It is not clear where the pixel data is coming from when no Kanji ROM is connected. It is not forced to ff or 0. It almost looks like it also doesn't come from vram. What is reading it often seen is that the first 2 bytes are different from VRAM using the Kanji ROM addressrest, then the remainder of the bytes are the same and look to be based on BC low byte bit value.
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