INMOS G364 framebuffer

The G364 framebuffer was a line of graphics adapters using the SGS Thompson INMOS G364 chipset, produced by INMOS (eventually acquired by SGS Thompson and incorporated into ST Microelectronics) in the early 1990s. The G364 included a RAMDAC and a 64-bit interface to VRAM graphical memory to implement a framebuffer, but did not include any hardware-based graphical acceleration other than a hardware cursor function.

The G364 was largely similar in design and functionality to the G300 framebuffer, but had a 64-bit VRAM interface instead of the slower 32-bit interface of the lower-price G300.

Although the G364 was capable of providing comparatively high resolution output (up to 1600x1200 pixels at 8 bits-per-pixel, in many cases) typically achieved only in UNIX workstations such as Sun Inc. or SGI computers, it was not a popular chipset for the personal computer manufacturers of the early 1990s and was not adopted by any major workstation manufacturers.

The G364 framebuffer found use in an after-market Commodore Amiga graphics card, and as the primary graphics system sold with the MIPS Magnum 4000 series of MIPS-based Windows NT workstations.