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But the question wasn't:   Does the OS know about the position of the monitors , but can the system make use of two monitors.  To which, it's yes. How about 3 or more monitors? I remember reading an article by Bruce Webster in Macworld magazine in 1987 or 1988 (not long after the Mac II first came out, at any rate). The Mac II was the first Mac with expansion slots (6 of them), and it also introduced Color QuickDraw, the Palette Manager, multi-screen support and loads of other cool stuff. Anyway, Webster was trying to put the multi-screen support to the test. He got hold of six video cards and six monitors, and tried to hook them all up. The bad news was, he couldn't get all six to work at once

: Not on the Mac. 32000 x 32000 pixels is the max. Any number of monitors : you like. And resolution and pixel-depth on each different monitor, from : black and white, to 32-bit color. :   I thought the coordinates were ((-32,000 to +32,000)x(-32,000 to : +32,000)) which would be 64,000 x 64,000. That would be 40 moniters by 53 : moniters (if each moniter was at 1600 x 1200) which is a total of 2120 : moniters. In this I would recomend the 9500 so you have enough slots for : all of your cards. Nope, it's 0,0 to 32767,32767. Still a lot of screen real estate.

[A long explanation about how *one* manufacturer makes *one* card that can be used to run in a dual-monitor mode under Windows NT...] Oh.  So, in other words, you really *can't* just hook up two or more monitors with two plain old Wintel monitor cards and get a usable, shared desktop. No, Chad. After I posted this I went and poked about at work. It appears that there are cards specifically designed for such a setup, so that they actually have multiple video ports.  This allows you to connect multiple monitors for dual and quad headed systems. Furthermore, it's not one manufacturer. I'm aware of examples of such setup from one *chipset* manufacturer. And if you think about it, there aren't that many chipsets for the PC video:  S3, Tseng, Mach, Weitek, MGA, and perhaps a few more. MGA chipset is what I'm familiar with. It's also the chipset on which Matrox (who builds them), Compaq (whose QVision 2000 is _base_d on), DEC (whose on-board video for the Celebris is _base_d on), and etc.... I know for a fact that both Compaq and Matrox offers a dual monitor setup.  Whether DEC and the rest also do so, I don't know.  We don't have many DEC machines around at work