Cirrus Logic CL-GD5462 / CL-GD5464 / CL-GD5465
The CL-GD5462, CL-GD5464 and CL-GD5465 were part of Cirrus Logic's Laguna VisualMedia family of 2D, 3D, and video accelerators, which included 3D acceleration.
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Released | 1995 (5462 and 5464), 1997 (5465) |
| Bus | PCI (5462 and 5464) or AGP (5465) | |
| Chipset | Cirrus Logic CL-GD5462/CL-GD5464 or CL-GD5465 | |
| Standards | MDA, Hercules, CGA, EGA, VGA | |
| Memory | 1 MB or 2 MB EDO | |
| RAMDAC | (Internal 24-bit) | |
| Part # | - | |
| See Also | CL-GD5436, CL-GD5440, CL-GD5446 |
The CL-GD5462 was a fast 2D graphics accelerator for the PCI bus. It used a single channel of RDRAM memory, providing up to 500 MB/s bandwidth. The 5462 lacked 3D acceleration, but did include a BitBLT engine, video window features, and a 64×64 hardware cursor. Found in embedded form on the MSI MS4415 motherboard, and on the ExpertColor Laguna 5000 card.
The CL-GD5465 was their first chipset designed for the brand new AGP bus in 1997. It took the already decent 2D core from the CL-GD5462 and coupled it with an integrated 230 MHz RAMDAC and 3D processor. Found on one of the very first AGP graphics cards, the Cirrus Logic Laguna3D-AGP, released in February 1997. With its CL-GD5465, this continued to use RDRAM memory from Rambus, which was supposedly up to ten times faster than typical DRAM of the time. With the 5465, the speed of this memory rose from 500 MHz to 600 MHz. The chipset supported from 2 to 8 MB of local graphics memory, though only 2 and 4 MB versions were eventually produced. Sadly the 3D graphics core was a bit buggy, with poor perspective correction, heavy dithering in 16-bit colour modes, a complete absence of fogging (despite its spec sheet having this), and a poor implementation of bilinear texture filtering. There were also some issues with games not running properly due to textures existing in system memory, not local memory. The AGP card's performance however, was pretty decent - up there with the later ATi Rage IIc AGP.
Revisions
Known chip revisions include: A
Competition
In the Media
The device is crammed with technology which enables it to handle video and 3D work at jaw-dropping speeds. It numerous features include line and polygon drawing acceleration, hardware zooming, a 64-bit graphics engine and direct conversion from the different colour palettes found in film sequences to those used on PCs." PC Review, Iss.47, September 1995
Setting it Up
There is no known setup configuration for cards that have a CL-GD5462, CL-GD5464 or CL-GD5465 chipset.
Downloads
Operation Manual Get in touch if you can provide this missing item! |
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