6600kjp@ucsbuxa.ucsb.edu (Kevin Phillips) (08/03/90)
I have a question: I have a Hyundai Monochrome Monitor (model HMM-1200PN) which came with no manual. Anyways, right now my system uses a Hercules-compatible Monochrome graphics card, but I would like to expand my system to a VGA card. Is it possible to use my current monitor as a greyscale monitor with a VGA card? Or do VGA cards have output that is incompatible with monochrome monitors? All replies are appreciated. Thanks. Kevin Phillips 6600kjp@ucsbuxa.ucsb.edu
psrc@mtunq.ATT.COM (Paul S. R. Chisholm) (08/05/90)
In article <6053@hub.ucsb.edu> 6600kjp@ucsbuxa.ucsb.edu (Kevin Phillips) writes: > . . . right now my system uses a Hercules-compatible Monochrome > graphics card, but I would like to expand my system to a VGA card. > Is it possible to use my current monitor as a greyscale monitor with > a VGA card? No. MDA and HGA compatible monitors are called "TTL monitors", for the interface they use. (Only monochrome monitors have this kind of interface. They can be used with EGA cards as well, but hardly ever are.) TTL monitors can't display shades of gray. VGA cards need analog monitors, either color or monochrome; either way, an entirely different species. Paul S. R. Chisholm, AT&T Bell Laboratories att!mtunq!psrc, psrc@mtunq.att.com, AT&T Mail !psrchisholm I'm not speaking for the company, I'm just speaking my mind.
terry@wolves.uucp (Terry L Parker) (08/11/90)
In <1203@mtunq.ATT.COM> psrc@mtunq.ATT.COM (Paul S. R. Chisholm) writes: >In article <6053@hub.ucsb.edu> 6600kjp@ucsbuxa.ucsb.edu (Kevin Phillips) writes: >> . . . right now my system uses a Hercules-compatible Monochrome >> graphics card, but I would like to expand my system to a VGA card. >> Is it possible to use my current monitor as a greyscale monitor with >> a VGA card? >No. Yes, it is. The ATI VGA Wonder will work with a monochrome TTL monitor. >MDA and HGA compatible monitors are called "TTL monitors", for the >interface they use. (Only monochrome monitors have this kind of There are monochrome TTL monitors, but CGA and EGA monitors are RGB. >are.) TTL monitors can't display shades of gray. VGA cards need That is incorrect. TTL monitors are capable of displaying shades of gray. I used an ATI EGA Wonder on my TTL mono monitor for two years and it displayed the EGA colors as shades of grey just fine. It is not a limitation of the monitor, but most video cards. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Terrence L. Parker terry.parker@bbs.acs.unc.edu -OR- "Just you... and MOFO, the terry%wolves@cs.duke.edu -OR- psychic gorilla!"-Penn & Teller CIS: 76114,3715 -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
koch@motcid.UUCP (Clifton Koch) (08/14/90)
From article <1990Aug10.203858.15781@wolves.uucp>, by terry@wolves.uucp (Terry L Parker): >>In article <6053@hub.ucsb.edu> 6600kjp@ucsbuxa.ucsb.edu (Kevin Phillips) writes: > >>MDA and HGA compatible monitors are called "TTL monitors", for the >>interface they use. (Only monochrome monitors have this kind of > There are monochrome TTL monitors, but CGA and EGA monitors are > RGB. TTL refers to the voltage thresholds used to send the video information to the monitor. RGB means that each color has a different signal(s) to control it. Both CGA and EGA monitors are both RGB and TTL. VGA is an an example of RGB and analog. > >>are.) TTL monitors can't display shades of gray. VGA cards need > > That is incorrect. TTL monitors are capable of displaying shades of > gray. I used an ATI EGA Wonder on my TTL mono monitor for two years > and it displayed the EGA colors as shades of grey just fine. It is > not a limitation of the monitor, but most video cards. The monitor merely turns the color information from the card into shades of grey. The card has little to do with it unless you're shooting for some sort of compatibility mode. It's the monitor which has to make sense of the incoming signal. Cliff Koch