Hitachi LSI HD63484 Advanced CRT Controller chip (ACRTC) is a GPU created by Hitachi in 1984 that supports 4K display resolution.HD6348 ACRTC Advanced CRT Controller User's Manual | Hitachi
Description The LSI HD63484 was built in 2 μm CMOS technology and had about 60,000 MOSFETs and could operate at 8 MHz. ACRTC introduced a screen resolution of 4096×4096 pixels at 1-bit color depth (monochrome), or 1024×1024 at 16-bit color (65,536 colors). Focused on computer graphics for the emerging desktop publishing market with bitmap printing.Printing prints from a form on which images consist of raster printing elements. The chip had the ability to program the synchronization signal of CRT monitors. It could support up to 2 megabytes of video memory and offered an asynchronous DMA bus interface that could be mapped to 16-bit ISA and VME buses.
See also NEC μPD7220 TMS34010 List of Intel GPUs
Literature Baraa Al-Hilali. Mathematical Representation of Color Spaces and Its Role in Communication Systems. Journal of Applied Mathematics. Hindawi, 2020.(PDF) Mathematical Representation of Color Spaces and Its Role in Communication Systems | Baraa Al-Hilali - Academia.edu Amit Joshi, Nilanjan Dey, Simon Sherratt, Xin-She Yang. Proceedings of Sixth International Congress on Information and Communication Technology. ICICTInternational Conference on Information and Computer Technologies. 2021, London, Volume 2. Springer Nature Singapore, 2021. . Gustavo Henrique Cervi. Pipeline Metagenômico Com o Uso de Algoritmo de Compressão Lossy e Matching Heurístico Não-Determinístico. Porto Alegre, 2022.http://repositorio.ufcspa.edu.br/jspui/handle/123456789/2099 Jon Peddie. The History of the GPU - Steps to Invention. Springer Nature, 2023. .
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External links 日立評論1984年7月号:グラフィック ディスプレイ コントローラACRTC“HD63484” - 1984_07_10.pdf Hitachi HD63484 ACRTC Resolusi 4K Hitachi Semiconductor GPU History: Hitachi ARTC HD63484. The second graphics processor