HuC6272
From ArchaicPixels: HuC and PCEAS Documentation
Referred to as "KING" by NEC-HE.
KING is responsible for generating up to 4 background graphics, and can scale and rotate one background, and SCSI CD access. It also handles access to KRAM by RAINBOW and the ADPCM function of SoundBox.
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Background Generators
KING backgrounds are drawn at 256x240, at a configurable bit depth, ranging from 2bpp paletted to 32-bit YYUV(32-bits for 2 pixels), in direct(like a framebuffer) or indirect(BAT) modes. Pixels are packed, not planar.
KING can make 1 fetch from $00000-$1FFFF of KRAM and 1 of fetch from $20000-$3FFFF of KRAM per pixel, for a total of 2 KRAM fetches per pixel. Obviously, this means you can't have more than 2 64K/16M-color backgrounds in direct mode, and only 1 in indirect/BAT mode!
