aboutsummaryrefslogtreecommitdiff
path: root/Documentation/sgi-visws.txt
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/sgi-visws.txt
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'Documentation/sgi-visws.txt')
-rw-r--r--Documentation/sgi-visws.txt13
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/sgi-visws.txt b/Documentation/sgi-visws.txt
new file mode 100644
index 00000000000..7ff0811ca2b
--- /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.