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Offline NagrommeTopic starter

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Amiga 3000 and Dell flat panel LCD?
« on: June 02, 2005, 05:25:53 PM »
I'm looking at buying a Dell 1905FP for my Mac and PC to share--and since it has analog VGA input, I'd REALLY like to get it working on my Amiga 3000 too!

The A3000 signal, IIRC, is non-interlaced 60 Hz horiz., 31 Khz vert. The Dell seems to JUST cover that range!

But of course the Amiga's sending non-standard resolutions, like 640x400. What will happen? Can I use this LCD on my Amiga?
If so, would the image be squashed? Floating in black borders?

I know I won't get the Dell's 1280x1024... I just want my Amiga running with SOME kind of display sharper than TV so I can play 2-player Lemmings (NTSC) and access my Final Writer and DeluxePaint files. And I don't want to fry anything :)

(LCD specs: http://support.dell.com/support/edocs/monitors/r83546/EN/about.htm#Specifications )

If not this, would any LCD be usable on my Amiga?

(I won't even hope for using interlaced modes--so no OpalVision. But my Amiga 520 adapter has been filed down to send OpalVision to TV in a pinch.)

Thanks for any advice! I look forward to getting back into my trust Amiga...
nagr[color=FF0000]o[/color]mme
Mac - Windows - Amiga 3000
 

Offline NagrommeTopic starter

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Re: Amiga 3000 and Dell flat panel LCD?
« Reply #1 on: June 02, 2005, 06:19:37 PM »
That's encouraging.

I wasn't sure how LCDs handled non-standard resolutions that don't appear in the specs.

I'd prefer big and blurry (I know what you mean), but small and sharp is fine too. Anyone know which way the Dell would go?

Regardless, anything that lets me ditch my Amiga's awful 15" (non-Amiga) CRT is good! :)
nagr[color=FF0000]o[/color]mme
Mac - Windows - Amiga 3000
 

Offline NagrommeTopic starter

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Re: Amiga 3000 and Dell flat panel LCD?
« Reply #2 on: June 03, 2005, 06:40:36 AM »
Thanks for all the help!

Two things I'm curious about:

1. What typically happens with the border (empty overscan region)? On a CRT you get a background color. Do LCDs show a stripe of that, or is it just gone? I'd think the LCD couldn't tell the empty area from the rest (since you can drag an Amiga screen down there, for instance) and so you'd get a big band of border color around your display. Which is OK.

2. What about if you ARE using overscan, in DeluxePaint, say. Will you get all the pixels on the LCD?

I've seen LCDs zoom, and I don't find it to be much softer than a CRT is anyway. Not as nice as native LCD, but I still think I'll be pleased compared to my old CRT :-)

Thanks for the PAL warning. I didn't think of that. I'll hate to give up my PAL shareware games! And my NTSC TV won't handle them either! I think there's a util for forcing NTSC though. I'll lose the bottom of the games but they may still run. Or is there some kind of hardware adapter that could double the Hz on the way to the monitor?

And when you say "slow TFT" are you referring to the 1905 I mentioned? Or another Dell that DOES handle less than 56Hz?

I've seen slower LCDs with fast motion and I don't expect I'll mind it the way some do. This Dell even got a good review for gaming. It seems that the ms number is only a part of the smearing issue, judging by user reports. Some units with a slower number get reported as having less smearing visible, for some reason.

But mainly, it's a 19" display with good reviews, features, and portrait ability... that you can supposedly get for $260 if you wait for the right Dell coupon!

Review:
http://www.anandtech.com/displays/showdoc.aspx?i=2332
nagr[color=FF0000]o[/color]mme
Mac - Windows - Amiga 3000
 

Offline NagrommeTopic starter

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Re: Amiga 3000 and Dell flat panel LCD?
« Reply #3 on: June 03, 2005, 07:38:00 PM »
Thanks everyone, for many clarifications!

It sounds likely to work--maybe not certain, so I'll look into return policy.

The Amiga modes I'd most-commonly use are not listed in the specs--they're in the freq. range but not listed as pixel sizes:

320x200
320x400 (maybe rarely)
640x400
All at 60 Hz

(And PAL 320x256 games at 50 Hz are out of range.)
nagr[color=FF0000]o[/color]mme
Mac - Windows - Amiga 3000