[comp.sys.apple2] applecolor RGB on pc?

george@racsys.UUCP (George Rachor) (11/09/90)

I have had a GS on my desk for a while now and wouldn't think of giving it up.

I find though that from time to time I need to work with a pc.  Rather than
setting up another desk I wouldn't mind setting the pc under my desk.  When
not in use I would store the keyboard on top of the pc.

I run into problems with the monitor.  Can a pc with an ega card successfully
drive the applecolor RGB monitor?  I would like to set up a switch to be able
to select between the pc and the GS.  Am I talking nonsense? (Yes I considered
using a pc transporter but rejected this because it is too slow and I can
only get cga).


-- 
George Rachor Jr.
Rachor Data Center, Beaverton, OR  97005
racsys!george@flight.hf.intel.com

$CSD211@LSUVM.BITNET (Mark Orr) (11/09/90)

>I have had a GS on my desk for a while now and wouldn't think of giving it up.
>
>I find though that from time to time I need to work with a pc.  Rather than
>setting up another desk I wouldn't mind setting the pc under my desk.  When
>not in use I would store the keyboard on top of the pc.
>
>I run into problems with the monitor.  Can a pc with an ega card successfully
>drive the applecolor RGB monitor?  I would like to set up a switch to be able
>to select between the pc and the GS.  Am I talking nonsense? (Yes I considered
>using a pc transporter but rejected this because it is too slow and I can
>only get cga).

>George Rachor Jr.
>Rachor Data Center, Beaverton, OR  97005
>racsys!george@flight.hf.intel.com

No, you can't use an AppleColor RGB monitor on a PC. Most if not all PC
monitors are use digital (TTL) outputs while RGB outputs for apples use
analog RGB. Other than that the connectors are physically different (DB-9's
for PC's and DB-15's for Apples). However, some new PC monitors advertise
"Macintosh compatibility" and should work with a IIgs. It would be better
(cheaper) to get seperate monitors; as these analog/digital monitors (made
by companies like NEC, Nanao, etc.) tend to be expensive (~$1000).

Amazingly, it would be easier if you had a //e. Applied Engineering makes
a dual analog/digital video interface (which works w/ PC monitors) for its
Ramworks III card...but they make no such interface for the IIgs.

-----------------------------   "You will die...you will die slowly...
Mark Orr                    !    your stomach will swell...your intestines
$CSD211@LSUVM.SNCC.LSU.EDU  !    will writhe and boil...your eyes will burst
       @LSUVM.BITNET        !    ...and some horrible stuff, possibly your
-----------------------------    brains, will start coming out through your
                                 nose." - Apple's new marketing slogan for
                                          the II series.

toddpw@nntp-server.caltech.edu (Todd P. Whitesel) (11/10/90)

Here's a more accurate explanation: the GS's RGB is hardwired to take video
signals which are timing compatible with CGA. You are better off buying a cheap
EGA monitor for the PC.

If you bough a multisync/multifrequency monitor, then it is quite possible to
switch both computers to it -- but it costs more than a cheap EGA.

Todd Whitesel
toddpw @ tybalt.caltech.edu

cs4w+@andrew.cmu.edu (Charles William Swiger) (11/11/90)

The problem is that the Apple monitor uses analog RGB, while a EGA card
produces digital (TTL) signals that require a digital RGB monitor.

You could use your Apple monitor if you got a VGA card, I think.  VGA
produces analog signals like the //gs...better check and make sure the
monitor will accept the sync frequency of the VGA card.  (This is why
the so called "multisync" monitors are around.  They can handle a wide
range of frequencies.)

Getting VGA if it will work is almost certainly your best bet; you'll
get better graphics for the pc without having to pay for another monitor
or something like that.


-- Charles William Swiger
    cs4w+@andrew.cmu.edu

whitewolf@gnh-starport.cts.com (Tae Song) (11/16/90)

|I have had a GS on my desk for a while now and wouldn't think of giving it up.
|
|I find though that from time to time I need to work with a pc.  Rather than
|setting up another desk I wouldn't mind setting the pc under my desk.  When
|not in use I would store the keyboard on top of the pc.
|
|I run into problems with the monitor.  Can a pc with an ega card successfully
|drive the applecolor RGB monitor?  I would like to set up a switch to be able
|to select between the pc and the GS.  Am I talking nonsense? (Yes I considered
|using a pc transporter but rejected this because it is too slow and I can
|only get cga).

Not with Apples monitor... actually you can't really with any monitor that I ko
know of... however, you can get a monitor that can handle both CGA and GS
graphics.  Magnavox has a model (CM8135, I think) has inputs for TTL/digital
and Analog RGB as well as Svideo(SVHS) or composite... it's $250 through mail
order $25 for custom cable to use with GS, and has a 14" screen.  I'm planning
on getting for myself... I also have a GS and IBM compatible with a monochrome
monitor for both computers... this monitor will allow me to have color on both
machines...