[comp.sys.amiga] Amiga to Atari monitor

lphillips@lpami.wimsey.bc.ca (Larry Phillips) (07/24/89)

In <2564@ur-cc.UUCP>, lmna_cif@uhura.cc.rochester.edu (Louis Nau) writes:
>	I am wondering if anyone out there has tried to connect an Atari
>SC1224 Color monitor to an Amiga.  I already own an Atari 1040ST system,
>and am planing on buying an Amiga 500.  I would like to be able to save the
>cost of buying another monitor if at all possible, as this may determine if 
>I can afford the Amiga system.  I am new to hardware hacking, and don't even
>know if the signals are compatible.  Please Email me or post as to the 
>plausability of this idea.

Yes you can. Jeff Lydiatt and I both bought Atari SC1224 monitors for our Amiga
1000 machines shortly after we got them (Jeff still has his A1000, and still
uses the Atari monitor).  The conversion was simple, consisting of removing one
DIN plug from the Atari-supplied cable, and connecting the wires to the
appropriate pins on a DB-23 (hacked from a DB-25 back then, because you
couldn't find DB-23s for any price).

When I tried to hook the same monitor to my 2000, it didn't work, but that was
because one of the sync signals was loading down the AMiga, causing it to think
I had a genlock plugged in, thus inhibiting the clock. If this is the sace with
yours, you can easily buffer the sync line.

One other small point. The early SC1224s were vastly superior to the present
day model of the same number, which has been Tramielized to reduce cost.

-larry

--
"So what the hell are we going to do with a Sun?" - Darlene Phillips -
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lmna_cif@uhura.cc.rochester.edu (Louis Nau) (07/25/89)

	I am wondering if anyone out there has tried to connect an Atari
SC1224 Color monitor to an Amiga.  I already own an Atari 1040ST system,
and am planing on buying an Amiga 500.  I would like to be able to save the
cost of buying another monitor if at all possible, as this may determine if 
I can afford the Amiga system.  I am new to hardware hacking, and don't even
know if the signals are compatible.  Please Email me or post as to the 
plausability of this idea.

			Thanks in advance for any help you can give,

						louis Nau
					lmna_cif@uhura.cc.rochester.edu

P.S.  This is my first attempt at posting and I am a terrible speller,
	so please forgive any mistakes. :-)

kevin@cbmvax.UUCP (Kevin Klop) (07/25/89)

In article <2564@ur-cc.UUCP> lmna_cif@uhura.cc.rochester.edu (Louis Nau) writes:
>
>	I am wondering if anyone out there has tried to connect an Atari
>SC1224 Color monitor to an Amiga.

I have heard of people managing it.  I forget exactly the pin differences.
If you can get me the pin outs of the Atari, I'll tell you what you need to
do to connect the (*gulp*) (*grin*) Atari monitor to your amiga.  Note
that I'm doing this on my own., and NOT as an employee of Commodore-Amiga.
If you blow up something, it will be, unfortunately, considered a
warranty-voiding experience. I blew up my original A1000's motherboard
hooking up a special monitor to it.  I accidentally shorted two cables
and, well, pulled a LOT of current through the video circuitry... *grin*

                         -- kevin --

Kevin Klop		{uunet|rutgers|amiga}!cbmvax!kevin
Commodore-Amiga, Inc.

The number, 111-111-1111 has been changed.  The new number is:
134-253-2452-243556-678893-3567875645434-4456789432576-385972

Disclaimer: _I_ don't know what I said, much less my employer.

grr@cbmvax.UUCP (George Robbins) (07/25/89)

In article <2564@ur-cc.UUCP> lmna_cif@uhura.cc.rochester.edu (Louis Nau) writes:
> 
> 	I am wondering if anyone out there has tried to connect an Atari
> SC1224 Color monitor to an Amiga.  I already own an Atari 1040ST system,
> and am planing on buying an Amiga 500.  I would like to be able to save the
> cost of buying another monitor if at all possible, as this may determine if 
> I can afford the Amiga system.  I am new to hardware hacking, and don't even
> know if the signals are compatible.  Please Email me or post as to the 
> plausability of this idea.

It is perfectly doable, and depending on whether you got one of the "good"
SC1224's you'll get a pretty nice display.  Resolution is nothing special,
but the black-matrix screen makes for nice bright colors.

I've done it simply by chopping the Atari cable and putting on a 23-pin
connector, using the separate horizontal and vertical sync signals.  You
may have to "buffer" the sync's if your system won't boot reliably with
the monitor plugged in.  You may also want to wire up the Audio signal
in to monitor cable to the Amiga audio output.

-- 
George Robbins - now working for,	uucp: {uunet|pyramid|rutgers}!cbmvax!grr
but no way officially representing	arpa: cbmvax!grr@uunet.uu.net
Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)

protcoop@bnr-public.uucp (Co-op Student) (07/26/89)

There is a fellow out there by the name of Barry Comer who has done
this.  Barry is a friend of mine from university who has an ST and an
Amiga.  Barry?  You listening?  I have seen Barry's name floating around
lately so if you ask him nicely he may just repost the pin assignments.
(I think he already posted them twice).
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