Intel i750

The Intel i750 is a two-chip graphics processing unit composed of the 82750PB pixel processor and 82750DB display processor. The i750 chip was used in video capture/compression cards such as the Intel Smart Video Recorder and Creative Labs Video Blaster RT300.[1][2] These cards were needed to allow Video for Windows to record footage from a video camera.[3]

Although Intel had made earlier chips targeting graphics (e.g., 82786 graphics coprocessor), this was seen as Intel's first attempt to break into the video controller marketplace. The effort was a failure and led to Intel leaving the market for some time. The Indeo video compressor was originally built to work with the i750, but was later ported to other systems as well.

Technical Details

82750PB

The 82750PB pixel processor is packaged in a 132-pin PQFP running at 25 MHz. It contains 57 instruction set, eight entries 64 bit vector registers (same MM0~MM7 register naming as used on the x86, the only difference being that i750 has dedicated registers while the x86 MMX CPU does not. However, the i750 lacks general purpose integer registers unlike its x86 counterpart), a 64-bit ALU, a 512×48-bit instruction RAM, a 512×16-bit data RAM, two internal 16-bit buses, a wide instruction word processor, a variable length sequence decoder, a pixel interpolator and an interface supporting a 4 GB linear address space. These features make it capable of text, 2D and 3D graphics, video compression, and real-time video decompression and video effects. It can support up to 30 frames per second.

82750DB

The 82750DB display processor supports variable bits per pixel, pixels per line, and pixel widths allowing trading-offs in image quality vs. refresh rate and VRAM requirements.

82750PD

Intel's low-cost i750 processor, 82750PD, and ATI's 68890 video capture Chip for video-only boards.

See also

References
  1. Quinlan, Tom (1993-04-05). "Compress a video minute into 9 MB". InfoWorld. 15 (14). InfoWorld Media Group, Inc. p. 29. Retrieved 2018-03-15.
  2. Electronic Documents. Learned Information. 1995. p. 70. The system is based on two cards plugged into two standard computer slots. Video is handled by the VideoBlaster RT300 card, using the Intel i750 pe (a clock-doubled version of the standard chip). Don't expect dramatic television-like full-motion video of...
  3. Eckerson, Wayne; O'Brien, Timothy (1992-11-16). "Lotus and Microsoft face off in multimedia market". Network World. 9 (46). IDG Network World Inc. p. 93.
  • Manepally, R.; Sprague, D. (1991). "Intel's i750 (R) video processor-the programmable solution". COMPCON Spring '91 Digest of Papers. pp. 324–329. doi:10.1109/CMPCON.1991.128825. ISBN 0-8186-2134-6.
  • 82750PB Pixel Processor, Specification. Intel Corporation. February 1991.
  • 82750DB Display Processor, Specification. Intel Corporation. February 1991.
  • Green, James L. (1992-07-01). "Capturing Digital Video Using DVI" (web). Dr. Dobb's. p. 3. - Alternate location (without diagrams)
  • Intel (1994). I750, i860, i960 processors and related products. Mt. Prospect, IL: The Company. ISBN 9781555122171.


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