Re: [CAD_CAM_EDM_DRO] Monitor question

Chuck Knight wrote:

>>Setting up a computer for the shop, strictly DOS, with TurboCNC on it for
>>now, 450 MHZ..
>>My question: Can I use a modern LCD monitor on a old DOS computer? I assume
>>in SVGA, or VGA mode.
>>
>>
>>
>>
>
>A monitor is a monitor. So long as it takes the industry standard VGA
>signals, it will work...assuming that your PC puts out VGA signals. :-)
> 450MHz machine? Practically guarantee that it does. The computer
>won't care if it's a tube, an LCD, a plasma system, a DLP projector...a
>monitor is a monitor is a monitor.
>
>
>

Not true! An analog CRT monitor will work on anything within its
sync range, and display a pretty decent picture. This is not true at all
for LCD monitors, because there are physical pixels on the screen.
These pixels are controlled through transparent physical "wires" in
the screen. Unlike the electron beam in the CRT, which just paints
electrons onto the phosphors across the screen, the LCD cannot address
in between the physical pixels. It fudges it by mixing and blurring the
brightness to interpolate the VGA signal onto the existing pixel
boundaries as best it can. But, some cheaper LCDs simply WILL NOT
do certain video modes. I would not trust a new, bottom of the line
14" LCD to give a good (or any) image from DOS video modes, which
are often not the same sync standards as Windows video modes.

I know this for a fact, as I have seen some combinations of LCD monitors
and even expensive projectors that would give absolutely HORRIBLE
results, or a black screen, when given certain video modes.

I know this is getting off-topic, but I had to correct this incorrect info!

Jon