Would the POST PC resolutions blow a 31K monitor?

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DJ Long Cat
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Would the POST PC resolutions blow a 31K monitor?

Post by DJ Long Cat »

I was thinking about making a cheap mame PC since I got a small and goodish PC for free recently but I've noticed that when the PC boots, its post screen is some weird resolution like 700x400 or something crazy like that.

Would that be enough to blow my chassis for my monitor? I've heard that you don't run resolutions above 640x480 on a monitor or else its has a pretty good chance to blow it.

Any ideas? I can clarify more if I wasn't clear.
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yosai
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Re: Would the POST PC resolutions blow a 31K monitor?

Post by yosai »

Depends on the monitor but it's never a good idea to put unsupported higher resolutions through a chassis.
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pubjoe
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Re: Would the POST PC resolutions blow a 31K monitor?

Post by pubjoe »

Just curious. Has a monitor chassis ever actually died due to this? I know it looks scary when it's out of sync but is it actually harmful?

I've used weird resolutions like that on the MS9 in my egret 2. I once designed a mame UI at 720x240 and added a supporting modeline (through soft15khz). The picture stayed stable with a high horizontal pixel count as long as the scanline count was kept within supported boundaries.

Don't take the above as proper advice as I don't really know what I'm talking about.
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Re: Would the POST PC resolutions blow a 31K monitor?

Post by geotrig »

:lol:
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Re: Would the POST PC resolutions blow a 31K monitor?

Post by ninn »

My tv died after giving it the post screen for some month. right after post, there were just supported resolutions. It became distored like i've never seen a tv before.

But that was an ordinary crt-tv.
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Re: Would the POST PC resolutions blow a 31K monitor?

Post by colourthief »

Type X systems totally do this so it can't be that bad.
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yosai
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Re: Would the POST PC resolutions blow a 31K monitor?

Post by yosai »

Just curious. Has a monitor chassis ever actually died due to this?
Someone one here (or KC?) had their Pentranic blow due to the frequency between POST and soft15k/SetRes.
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Re: Would the POST PC resolutions blow a 31K monitor?

Post by cools »

pubjoe wrote:Just curious. Has a monitor chassis ever actually died due to this? I know it looks scary when it's out of sync but is it actually harmful?

I've used weird resolutions like that on the MS9 in my egret 2. I once designed a mame UI at 720x240 and added a supporting modeline (through soft15khz). The picture stayed stable with a high horizontal pixel count as long as the scanline count was kept within supported boundaries.

Don't take the above as proper advice as I don't really know what I'm talking about.
I've blown a chassis feeding it a bad signal.

740x240 is okay, you can in theory have ridiculous horizontal resolutions, it's the vertical that is critcal.
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pubjoe
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Re: Would the POST PC resolutions blow a 31K monitor?

Post by pubjoe »

Ah. I thought it might be one of those myths. Come to think of it, I think you tried to tell me otherwise years ago. :oops:

That's my thinking on wide resolutions. After all, interlaced resolutions do basically the same thing. For DJ longcat's POST screen, 700x400 isn't a worry on his VGA monitor as it's actually not "above" 640x480.
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ZedEx48K
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Re: Would the POST PC resolutions blow a 31K monitor?

Post by ZedEx48K »

I have a Tosh tri-sync and Win 7 causes a lot of this, however if you use Win XP it only does it for a slight moment as the boot res is lower so I will be going with that, also had a PC into a CRT TV VGA to SCART, boot was a mess but I never had problems with it crapping out in the time I owned it.
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Lettuce
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Re: Would the POST PC resolutions blow a 31K monitor?

Post by Lettuce »

You could get yourself one of these ArcadeVGA video cards,

http://www.ultimarc.com/avgainf.html"

Filters out all unsupported monitor modes on POST. Peace of mind
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Re: Would the POST PC resolutions blow a 31K monitor?

Post by Hewitson »

I wonder if a simple RC lowpass filter would work on a composite sync signal?
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