elg@killer.DALLAS.TX.US (Eric Green) (01/25/89)
Has anybody used a Samsung multisync monitor on their Amiga? My
brother is thinking about getting a MS-DOG machine with either EGA or
VGA, but he wants to be able to play games in color on the spare 1000,
too (currently he's jacking it into an old 1702 composite monitor to
play games, which setup doesn't work too well naturally). So he's
looking for a multiscan monitor, of which the Samsung looks least
expensive.
He was looking at NECs, but because of the problems his company is
having with NEC (not returning phone calls, not sending data sheets,
etc.), he has decided he wants nothing to do with NEC. (if anybody has
a datasheet for a V-25, though, he'd still appreciate it -- his boss
spec'ed a V-25 for their latest remote telemetry unit).
Question: does anyone have specs on how low it'll sync? Some
"multisync" monitors, e.g. Princeton, won't sync down all the way to
NTSC...
--
Eric Lee Green ..!{ames,decwrl,mit-eddie,osu-cis}!killer!elg
Snail Mail P.O. Box 92191 Lafayette, LA 70509
Netter A: In Hell they run VMS.
Netter B: No. In Hell, they run MS-DOS. And you only get 256k.billsey@agora.UUCP (Bill Seymour) (01/29/89)
From article <6912@killer.DALLAS.TX.US:, by elg@killer.DALLAS.TX.US (Eric Green):
: Has anybody used a Samsung multisync monitor on their Amiga? My
: brother is thinking about getting a MS-DOG machine with either EGA or
: VGA, but he wants to be able to play games in color on the spare 1000,
: too (currently he's jacking it into an old 1702 composite monitor to
: play games, which setup doesn't work too well naturally). So he's
: looking for a multiscan monitor, of which the Samsung looks least
: expensive.
I'm using the Samsung on my Amiga right now... You'll have to
use buffers on HSYNC and VSYNC to get the best picture and still allow
your machine to boot, but other than that it's working quite well. I
get some slight distortion with mine, the characters are squeezed in
the center of the screen. I've got a call in to Samsung about this, but
haven't heard back. I don't really notice it, but it's visable... The
colors are very good and it runs well with ECS although there's an audible
click when switching between 15.75KHz and 31.50KHz. The click isn't
there when switching from 15.75KHz to 17.60KHz or between 31.50KHz and
35.20KHz. (I do some weird things with my system clock...)
: Question: does anyone have specs on how low it'll sync? Some
: "multisync" monitors, e.g. Princeton, won't sync down all the way to
: NTSC...
No problems with syncing in to 15.75KHz... Specs call for 15-35.
:
: --
: Eric Lee Green ..!{ames,decwrl,mit-eddie,osu-cis}!killer!elg
: Snail Mail P.O. Box 92191 Lafayette, LA 70509
: Netter A: In Hell they run VMS.
: Netter B: No. In Hell, they run MS-DOS. And you only get 256k.
--
-Bill Seymour ...tektronix!reed!percival!agora!billsey
...tektronix!sequent!blowpig!billsey
Creative Microsystems Northwest Amiga Group At Home Sometimes
(503) 684-9300 (503) 656-7393 BBS (503) 640-0842mitchell@janus.berkeley.edu (Evan Mitchell) (06/29/89)
I'm thinking of getting one for my Amiga. Supposedly it has a dot pitch of .28. I don't know of any other specs. Is it a good moniter for the Amiga? Is it worth $699.00? What are other good multisync moniters for the Amiga? -Evan
kenk@algedi.UUCP (Ken Koster (N7IPB)) (07/10/89)
Evan Mitchell writes asking about the Samsung Multisync
>.28. I don't know of any other specs. Is it a good moniter for the Amiga?
In a word NO.
In a lot more words.
1. Purchased Samsung multisync in January (mail order).
2. Problems noted:
a. The screen tilted down to the right ( I kept falling out of my
chair while reading the screen :-) )
b. The vertical center third of the screen had a slight
difference in color saturation (lighter) just enough
to be annoying. This was most noticable on solid color
screens such as dark blue or green.
c. The purity was off. A green screen was red in the lower right
corner.
3. I took the monitor to the local authorized service center where
they kept it for 2 weeks. Upon receiving it back the only thing
fixed was the purity, all the other problems were still there.
The repair center said they could not find anything else wrong.
4. At this point I borrowed several samsung monitors from a friend
who used them on his MSDOS machines. They all showed the same tilted
screen and vertical bar problems when hooked up to the Amiga, but NOT
on the MSDOS machines. The Amiga worked fine with other multisync
monitors (NEC, Mitsubishi). At this time I also observed that icons
were a different size near the edge of the monitor than they were in
the middle. The difference in size was 0% vertical 25% horizontal.
This meant that the horizontal linearity is poor.
5. I returned the monitor to the repair center where it stayed for over
a month awaiting a new crt and yoke assembly. At this point Samsung
had eaten more in warranty charges than I had paid for the monitor in
the first place.
6. This should be the point at which I reort that the new crt and yoke
fixed the problem, but you guessed it, Nothing was different.
7. It appears that in their desire to provide a wide range multisync
monitor, Samsung compromised the horizontal linearity in their design.
As long as the monitor is run at high horizontal sweep rates the
linearity is acceptable ( <10% on an EGA system). The color change
near the center appears to be related to the non-linearity. But when
operated at 15.75khz the monitor is unusable.
I was lucky, I was able to return the monitor for my full purchase price. I must
say that throughout this Samsung was very cooperative and helpful and I would not
hesitate to buy one of their monitors for a less demanding application, But on the
Amiga, No way.
Lesson learned:
Try the monitor of your choice on the system of your choice. Just because
it looks good on an IBM with an EGA card does not mean it will look good
on an Amiga.
What did I end up with?
I now have a Mitsubishi Diamond Scan. It has a slightly longer persistance
phosphor that goes a long way toward making interlace usable.
The colors are good and the horizontal linearity is excellent.
--
Ken Koster (N7IPB) algedi!kenk@pilchuck.Data-IO.COM or
12653 NE 95th ...uunet!pilchuck!algedi!kenk
Kirkland,Wa 98033lphillips@lpami.wimsey.bc.ca (Larry Phillips) (07/11/89)
In <0308.AA0308@algedi>, kenk@algedi.UUCP (Ken Koster (N7IPB)) writes: >>.28. I don't know of any other specs. Is it a good moniter for the Amiga? >In a word NO. In another word,, YES. I do not use my Samsung at 15.75 KHz scan rate, so I can't say how it would perform in that mode, but I have been extremely happy with the performance of it on the flickerFixer. -- flip side -- (to steal a phrase) -larry -- Real Amiga hackers write printer drivers using Metascope. +----------------------------------------------------------------------+ | // Larry Phillips | | \X/ lphillips@lpami.wimsey.bc.ca or uunet!van-bc!lpami!lphillips | | COMPUSERVE: 76703,4322 | +----------------------------------------------------------------------+
hugh@censor.UUCP (Hugh D. Gamble) (07/13/89)
Some of what you describe is surely limitations of the monitor, but it sounds like the Amiga and/or other things were also responsible for generating magnetic fields that were causing you grief. Some monitors are better at degausing (sp?) or better shielded than others. If you rearrange your work area or do something to provide more shielding you can minimize the twisting or "red in the corner" effects. A good diagnostic (and kind of fun besides) is to try moving the monitor around. If you flip it upside down does the distortion stay the same relative to the monitor or to the surroundings? Rotating the monitor 90 degrees so it faces the side of the desk rather than the front can also help in checking on the orientation of an external magnetic field, so can a compass. I'm typing this next to a concrete pillar with steel reinforcing rods that is always "north" no matter what side of it you are on. Of course some people might not want to use the monitor upside down & sideways on a regular basis :-) but sometimes you can find a configuration that works and also minimizes the problem. Even a good technician can't fix a problem in his shop that only happens when the monitor is on your desk. Of course I'm sure there are monitors out there that are worse (and cheaper) than others, but on the bottom line what matters is whether you like what you see, so yes I'm in agreement that the best thing to do is look before you buy, or make sure you can return it. -- Hugh D. Gamble (416) 581-4354 (wk), 267-6159 (hm) (Std. Disclaimers) hugh@censor, kink!hugh@censor # It may be true that no man is an island, # but I make a darn good peninsula.