roguedaemon's BOSS GT-3 page

BOSS GT-3

The BOSS GT-3 - compact, built like a tank. Great for modern PA guys, with stereo effects, or just an amp if you're stuck in the dark ages (HAHA!!) - you can even specify the amp type, but its all a matter of preference. I do everything now at line level, mostly with computers, so I have no use for a guitar amp anymore... This unit still blends in perfectly with modern systems, ten years after I bought it. I also use it as an extra MIDI control pedal for synths.

BOSS GT-3 Official Site

Year Released: 1999
MSRP: $400
Effects: 32, 13 simultaneous
Program patches: 340 (banks of 4, 4 switch pedals) - 200 preset, 140 user. 10 realtime controllers per patch.
Roland Composite Object Sound Modeling (COSM) emulates 14 popular amps, cabs and even mic placement.
Connections: MIDI in/out, stereo 1/4" audio outs, 1/4" instrument in, 1/8" headphones, 1/4" effects loop, 1/4" external expression pedal/ctl

PDF's:
GT-3 Turbostart Document
GT-3 Preset Patch Lists: 1-35, 36-85
GT-3 Details/Specifications
GT-3 Owner's Manual
Roland MIDI Basics

Other links:
BOSS GT Central Forums
BOSS GT-3 Factory