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Documentation / sgi-visws.txt


Based on kernel version 3.14.11. Page generated on 2014-07-07 08:56 EST.

1	
2	The SGI Visual Workstations (models 320 and 540) are based around
3	the Cobalt, Lithium, and Arsenic ASICs.  The Cobalt ASIC is the
4	main system ASIC which interfaces the 1-4 IA32 cpus, the memory
5	system, and the I/O system in the Lithium ASIC.  The Cobalt ASIC
6	also contains the 3D gfx rendering engine which renders to main
7	system memory -- part of which is used as the frame buffer which
8	is DMA'ed to a video connector using the Arsenic ASIC.  A PIIX4
9	chip and NS87307 are used to provide legacy device support (IDE,
10	serial, floppy, and parallel).
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12	The Visual Workstation chipset largely conforms to the PC architecture
13	with some notable exceptions such as interrupt handling.
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