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Diffstat (limited to 'Documentation/sgi-visws.txt')
| -rw-r--r-- | Documentation/sgi-visws.txt | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/sgi-visws.txt b/Documentation/sgi-visws.txt new file mode 100644 index 0000000..7ff0811 --- /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. |