[comp.sys.ibm.pc] how about cga monitors as tv sets?

hadden@ella.SRC.Honeywell.COM (George D. Hadden) (05/16/89)

is this possible?

why would anyone want to do this?  well, i used to have a commodore 64
with a color monitor.  i bought a tv-tuner so that i could use it as a
tv.  i then gave the computer and monitor to my daughter to use at
school.  she didn't want the tuner.  now i have a toshiba 1100+ and a
cga monitor and would like them to play together.  do adapters for
this exist?

thanks for the help.

-geo
---
George D. Hadden, Honeywell Systems and Research Center
PHONE:  (612)782-7769
MAIL:   3660 Technology Drive MN65-2100, Minneapolis, MN 55418
ARPA:   hadden@src.honeywell.com
UUCP:   {umn-cs, ems, bthpyd}!srcsip!hadden

brown@astroatc.UUCP (Vidiot) (05/17/89)

In article <22044@srcsip.UUCP> hadden@ella.SRC.Honeywell.COM (George D. Hadden) writes:
<is this possible?
<
<why would anyone want to do this?  well, i used to have a commodore 64
<with a color monitor.  i bought a tv-tuner so that i could use it as a
<tv.  i then gave the computer and monitor to my daughter to use at
<school.  she didn't want the tuner.  now i have a toshiba 1100+ and a
<cga monitor and would like them to play together.  do adapters for
<this exist?

CGA monitors are digital and TV is an analog medium, which makes them
mutually exclusive.  If you want to watch TV with a maximum is 16 colors,
so be it.

The only computer monitor that can be used as a TV monitor is an analog one,
like VGA monitors (EGA is also digital, but 64 colors).  To use a VGA monitor,
the monitor MUST have a composite video input or you MUST have a NTSC to
RGBrgb converter.

In other words, no, you can't use your CGA monitor as a TV monitor.
-- 
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randy@chinet.chi.il.us (Randy Suess) (05/17/89)

In article <1915@astroatc.UUCP> brown@astroatc.UUCP (Vidiot) writes:
*CGA monitors are digital and TV is an analog medium, which makes them
*mutually exclusive.  
*The only computer monitor that can be used as a TV monitor is an analog one,
*In other words, no, you can't use your CGA monitor as a TV monitor.
*Vidiot            ucbvax!uwvax..........!astroatc!brown

	Well, actually there is another possibility.  There are a number
	of companies that make combo rgb/composit/TV units.  I have
	a couple made by Sears that work quite well.   It is basically
	a 13 inch TV with a front panel switch to go from TV, to rgb,
	to composit input.  It has a green screen button, and another
	that compresses the screen in the vertical direction about 20%.
	Makes cga text easier on the eyes.  It has pretty decent resolution
	and is impressive at 640X200 16 color EGA mode.  Great thing
	is the price was less than $200!

-- 
Randy Suess
randy@chinet.chi.il.us

jbudet@oakhill.UUCP (jim budet) (05/17/89)

>In other words, no, you can't use your CGA monitor as a TV monitor.

I have a Radio Shack monochrome composite CGA monitor and a Magnavox
RGBI/composite CGA monitor that I have used as a TV monitor with my
VCR.  The monochrome worked OK.  I primarily use it as a monitor when I
record programs on my VCR.  The contrast was hard to get right.  The
Magnavox supported RGBI, composite and had a switch for TV mode.
Though I could never tell the difference when the sitch was on or off.

===============================================================================
					Jim Budet
	Disclaimer			Motorola Microprocessor Products Group
					Austin, Texas
===============================================================================
	     Phone : (512) 891-3175
	    Usenet : cs.utexas.edu!oakhill!elmer!jbudet
	Compuserve : 73177,171
===============================================================================

brown@astroatc.UUCP (Vidiot) (05/18/89)

In article <1915@astroatc.UUCP> brown@astroatc.UUCP (Vidiot) writes:
<In article <22044@srcsip.UUCP> hadden@ella.SRC.Honeywell.COM (George D. Hadden) writes:
<<is this possible?
<<
<<why would anyone want to do this?  well, i used to have a commodore 64
<<with a color monitor.  i bought a tv-tuner so that i could use it as a
<<tv.  i then gave the computer and monitor to my daughter to use at
<<school.  she didn't want the tuner.  now i have a toshiba 1100+ and a
<<cga monitor and would like them to play together.  do adapters for
<<this exist?
<
<CGA monitors are digital and TV is an analog medium, which makes them
<mutually exclusive.  If you want to watch TV with a maximum is 16 colors,
<so be it.
<
<The only computer monitor that can be used as a TV monitor is an analog one,
<like VGA monitors (EGA is also digital, but 64 colors).  To use a VGA monitor,
<the monitor MUST have a composite video input or you MUST have a NTSC to
<RGBrgb converter.
<
<In other words, no, you can't use your CGA monitor as a TV monitor.

It has come to my attention that there are some CGA monitors with composite
video input and well as the DB-9 TTL input.  OK, so I have never seen one.
So, a clarification is needed, since the poster didn't say if it had a
composite video input or not.  I suspect not, since the poster would have
seen the connecter and tried the tuner with it.

If your CGA monitor only has the DB-9 connector, it is a digital monitor
only and cannot be used with analog video information.  If the CGA monitor
has the DB-9 and RCA composite video connectors, hook up the tuner to the
RCA connector and set a switch someplace for that input and you will be in
business.

Sorry about the confusion, but I really do suspect that because the original
poster only saw a DB-9 connector, the question got asked of the net.
-- 
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marc@rna.UUCP (Marc Johnson) (05/18/89)

In article <8471@chinet.chi.il.us> randy@chinet.chi.il.us (Randy Suess) writes:
>In article <1915@astroatc.UUCP> brown@astroatc.UUCP (Vidiot) writes:
]] *CGA monitors are digital and TV is an analog medium, which makes them
]] *mutually exclusive.  
]] *The only computer monitor that can be used as a TV monitor is an analog one,
]] *In other words, no, you can't use your CGA monitor as a TV monitor.
]] *Vidiot            ucbvax!uwvax..........!astroatc!brown
]] 
]] 	Well, actually there is another possibility.  There are a number
]] 	of companies that make combo rgb/composit/TV units.  I have
]] 	a couple made by Sears that work quite well.   It is basically
]] 	a 13 inch TV with a front panel switch to go from TV, to rgb,
]] 	to composit input.  It has a green screen button, and another
]] 	that compresses the screen in the vertical direction about 20%.
]] 	Makes cga text easier on the eyes.  It has pretty decent resolution
]] 	and is impressive at 640X200 16 color EGA mode.  Great thing
]] 	is the price was less than $200!
]] 
]] -- 
]] Randy Suess
]] randy@chinet.chi.il.us

Randy, Have you got a model number for the Sears monitor you mention? Sounds
like a real boon!  Please post or e-mail.  Thanx.


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randy@chinet.chi.il.us (Randy Suess) (05/22/89)

[In article <8471@chinet.chi.il.us> randy@chinet.chi.il.us (me) Suess) writes:
[]] 	Well, actually there is another possibility.  There are a number
[]] 	of companies that make combo rgb/composit/TV units.  I have
[]] 	a couple made by Sears that work quite well.   
[
[Randy, Have you got a model number for the Sears monitor you mention? Sounds
[= Marc Johnson			    BITNET:   rna!marc@rockvax.bitnet         =
[= Rockefeller Univ. Neurobiology    UUCP:     ...cmcl2!rna!marc               =

	Well, mine says "TV MONITOR - TOTAL VIDEO SYSTEM" model # 21353.
	There has been at least one update to this model since I bought
	mine, mainly slimming the case and coloring it black.
	
-- 
Randy Suess
randy@chinet.chi.il.us