Someone previously mentioned a dual-output video card for 68k Macs.
I'd just like one with DVI. As mentioned by others, USB would be nice, too. (While DVI wouldn't require any special drivers, since VGA vs. DVI could be handled purely in hardware, USB would require drivers be written.)
As a side note, I just discovered that my über-fancy ViewSonic 19" CRT (supports 2048x1536 at 60 Hz, or 1600x1200 at 75 Hz,) does not support 640x480 at 60 Hz! The frequency is too low for it. My Performa 600 defaults to that, and I can't use my BNC-to-DA-15 cable; I have to use the VGA cable with a dip-switch-equipped adapter to force it into 1024x768 fixed frequency mode, which somehow tricks the computer into sending out 640x480 66 Hz. (No, it won't display 1024x768.) I suppose I should just throw in a NuBus video card, but I haven't cracked the case open yet.
Another funny artifact of this monitor is that it will only go up to 1600x1200 over VGA, even if I override its DDC claims; yet it will go up to the full 2048x1536 over BNC. In spite of the two high resolutions, its phosphor grid can only realistically display 1280x960 without losing data. If I expand the picture to the very edges, 1440x1050 is ALMOST usable. (By "losing data", I mean that if I display a 50% black/50% white grid, like the default background on black and white Macs, I can see the individual black and white dots at 1280x960 or lower. At 1440x1050, I get moiré patterns on the edges, which have lower phosphor density than the middle. At higher than 1440x1050, I get moiré patters all over. At 2048x1536, the pattern looks completely gray.)
I'd just like one with DVI. As mentioned by others, USB would be nice, too. (While DVI wouldn't require any special drivers, since VGA vs. DVI could be handled purely in hardware, USB would require drivers be written.)
As a side note, I just discovered that my über-fancy ViewSonic 19" CRT (supports 2048x1536 at 60 Hz, or 1600x1200 at 75 Hz,) does not support 640x480 at 60 Hz! The frequency is too low for it. My Performa 600 defaults to that, and I can't use my BNC-to-DA-15 cable; I have to use the VGA cable with a dip-switch-equipped adapter to force it into 1024x768 fixed frequency mode, which somehow tricks the computer into sending out 640x480 66 Hz. (No, it won't display 1024x768.) I suppose I should just throw in a NuBus video card, but I haven't cracked the case open yet.
Another funny artifact of this monitor is that it will only go up to 1600x1200 over VGA, even if I override its DDC claims; yet it will go up to the full 2048x1536 over BNC. In spite of the two high resolutions, its phosphor grid can only realistically display 1280x960 without losing data. If I expand the picture to the very edges, 1440x1050 is ALMOST usable. (By "losing data", I mean that if I display a 50% black/50% white grid, like the default background on black and white Macs, I can see the individual black and white dots at 1280x960 or lower. At 1440x1050, I get moiré patterns on the edges, which have lower phosphor density than the middle. At higher than 1440x1050, I get moiré patters all over. At 2048x1536, the pattern looks completely gray.)