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". 日経クロステック（xTECH） (in Japanese). Retrieved 2022-12-09.
  2. ↑ "PC Engine / TurboGrafx-16 Architecture | A Practical Analysis". The Copetti site. 2020-12-18. Retrieved 2022-12-09.
  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". Open Archaeology. 5 (1): 350–364. doi:10.1515/opar-2019-0022. ISSN 2300-6560.
  4. ↑ History of Video Games - Four Decades of Video Entertainment (PDF). p. 14.
  5. ↑ "HuC6270 CMOS Video Display Controller MANUAL" (PDF).
  6. ↑ "Machine: Hudson HuC6270 VDC (huc6270)". arcade.vastheman.com. Retrieved 2022-12-09.
  7. ↑ "HuC6260 CMOS MANUAL" (PDF).
  8. ↑ "TurboGrafx-16 technical information". Archaic Pixels.
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