Xsgi was the Silicon Graphics (SGI) implementation of the X Window System (X11) server for its IRIX-based graphical workstations and servers. Xsgi was released in 1991 with IRIX 4.0 on the SGI Indigo workstation.
Work on Xsgi began in May 1989 when Tom Paquin left IBM to join SGI to integrate the X Window System with SGI's IRIS GL interface. Paquin recruited a set of software engineers experienced in X server implementation: Jeff Weinstein, Erik Fortune, Paul Shupak, John Giannandrea, Peter Daifuku, Michael Toy, Todd Newman, Spence Murray, and Dave Spalding.
Graphics hardware designed by Silicon Graphics provided accelerated rendering access through graphics hardware commands rather than memory-mapped framebuffers manipulated by the CPU. This made the Monochrome FrameBuffer (MFB) and Color FrameBuffer (CFB) device-dependent rendering layers supplied with the MIT X11 Sampler Server inappropriate for Silicon Graphics hardware. Jeff Weinstein developed the No FrameBuffer (NFB) device-dependent rendering layer to support the Silicon Graphics style of hardware access. SCO later incorporated the NFB layer in its X server porting layer.
Suppose I take a dollar bill and I crumple it in my hand,
Won't it take such empathy to make you understand,
That I am just a little boy?
I look up at the moon and I see it's made of cheese,
??? is called from her knees.
I know I shouldn't try and cross the street without my ma.
I'm stuck to the finer things, you're PROTECTED by the law.
Cause it's a temporary phase.
It's just a temporary phase.
And it's running round and round and round and round about your side,
She's down beneath the waterslide.
Boy you look up at the moon, you see its made of rocks.
Your imagination's 22, it preaches when it talks.
You really shouldn't try to change your mind without your ma,
When it comes down to Biology, she says "Boy, Ask Your Pa".
Cause it's a temporary phase.