diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /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.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 000000000000..7ff0811ca2ba --- /dev/null +++ b/Documentation/sgi-visws.txt | |||
@@ -0,0 +1,13 @@ | |||
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). | ||
11 | |||
12 | The Visual Workstation chipset largely conforms to the PC architecture | ||
13 | with some notable exceptions such as interrupt handling. | ||