From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001 From: root Date: Fri, 25 Dec 2015 04:40:36 +0000 Subject: initial_commit --- Documentation/sgi-visws.txt | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 Documentation/sgi-visws.txt (limited to 'Documentation/sgi-visws.txt') diff --git a/Documentation/sgi-visws.txt b/Documentation/sgi-visws.txt new file mode 100644 index 00000000..7ff0811c --- /dev/null +++ b/Documentation/sgi-visws.txt @@ -0,0 +1,13 @@ + +The SGI Visual Workstations (models 320 and 540) are based around +the Cobalt, Lithium, and Arsenic ASICs. The Cobalt ASIC is the +main system ASIC which interfaces the 1-4 IA32 cpus, the memory +system, and the I/O system in the Lithium ASIC. The Cobalt ASIC +also contains the 3D gfx rendering engine which renders to main +system memory -- part of which is used as the frame buffer which +is DMA'ed to a video connector using the Arsenic ASIC. A PIIX4 +chip and NS87307 are used to provide legacy device support (IDE, +serial, floppy, and parallel). + +The Visual Workstation chipset largely conforms to the PC architecture +with some notable exceptions such as interrupt handling. -- cgit v1.2.3