Hudson Soft HuC6270

HuC6270 is a video display controller (VDC) developed by Hudson Soft and manufactured for Hudson Soft by Seiko Epson. The VDC was used in the PC Engine game console produced by NEC Corporation, and the upgraded PC Engine SuperGrafx.

Technical specification
The HuC6270 generates a display signal composed of background (with x y scrolling) and sprites. It uses external VRAM via a 16-bit address bus. It can display up to 64 sprites on screen, with a maximum of 16 sprites per horizontal scan line.

Uses
The HuC6270 was used in consoles PC Engine and PC engine SuperGrafx consoles. Additionally, the VDC was used in two arcade games. The arcade version of Bloody Wolf ran on a custom version of the PC Engine. The arcade hardware is missing the second 16-bit graphic chip, the HuC6260 video color encoder, that is in the PC Engine. This means the VDC directly accesses palette RAM and builds out the display signals/timing. A rare Capcom quiz-type arcade game also ran on a modified version of the SuperGrafx hardware, which used two VDCs.