Engineering:Hudson Soft HuC6270

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HuC6270

HuC6270 is a video display controller (VDC) developed by Hudson Soft and manufactured for Hudson Soft by Seiko Epson.[1][2] The VDC was used in the PC Engine game console produced by NEC Corporation, and the upgraded PC Engine SuperGrafx.[3][4]

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.[5]

Uses

The HuC6270 was used in consoles PC Engine and PC engine SuperGrafx consoles. Additionally, the VDC was used in two arcade games.[6] 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,[7] that is in the PC Engine.[8] 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.

References

  1. ↑ 日経クロステック（xTECH）. "PCエンジンで動くソフトを自作しよう、SDKの関数を使いこなす" (in ja). https://xtech.nikkei.com/atcl/nxt/column/18/02206/092600004/. 
  2. ↑ "PC Engine / TurboGrafx-16 Architecture | A Practical Analysis" (in en). 2020-12-18. https://classic.copetti.org/writings/consoles/pc-engine/. 
  3. ↑ Aycock, John; Reinhard, Andrew; Therrien, Carl (2019-01-01). "A Tale of Two CDs: Archaeological Analysis of Full-Motion Video Formats in Two PC Engine/TurboGrafx-16 Games" (in en). Open Archaeology 5 (1): 350–364. doi:10.1515/opar-2019-0022. ISSN 2300-6560. https://www.degruyter.com/document/doi/10.1515/opar-2019-0022/html. 
  4. ↑ History of Video Games - Four Decades of Video Entertainment. pp. 14. https://cdn.hackaday.io/files/1649347056536256/History%20of%20Video%20Games-Four%20Decades%20of%20Video%20Entertainment.pdf. 
  5. ↑ "HuC6270 CMOS Video Display Controller MANUAL". http://www.blockos.org/releases/pcengine/documentation/HuC6270%20-%20CMOS%20Video%20Display%20Controller%20Manual.pdf. 
  6. ↑ "Machine: Hudson HuC6270 VDC (huc6270)". https://arcade.vastheman.com/minimaws/machine/huc6270. 
  7. ↑ "HuC6260 CMOS MANUAL". http://www.blockos.org/releases/pcengine/documentation/HuC6260%20-%20CMOS%20Video%20Color%20Encoder%20Manual.pdf. 
  8. ↑ "TurboGrafx-16 technical information". Archaic Pixels. http://archaicpixels.com. 




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