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Forums > Hardware Forum

15khz monitors..?? (12 comments)

( Forum: HW)

Posted by Gibaholic @ 02:34 CDT, 6 June 2014 - iMsg

so an arcade enthusiast of mine linked this video card to me todsy

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

obviously not top of the line but it let's you game on arcade monitors and other 15khz monitors. What interested me was playing QuakeWorld at 15khz... would this be doable? what would the result be..?

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<< Comment #1 @ 03:10 CDT, 6 June 2014 >>

(Link, Reply)

pecka_

http://en.wikipedia.org/wiki/Horizontal_scan_rate

<< Comment #2 @ 07:09 CDT, 6 June 2014 >>

(Link, Reply)

doped

i think i get what you are saying, but all ordinary computer crt's will display the native software resolution of doom and quake. I'm not sure, but msdos was something like 700x480 or something along those odd lines? was doom 320x200? I might be completely off. Does it have to be interlaced to have scan lines? or is that even older with monochrome screens/green?

<< Comment #3 @ 12:53 CDT, 6 June 2014 >>

(Link, Reply)

Lorfa '

I'm running 100 KHz horizontal at 800x600, 154 Hz vertical.

As far as I can tell this arcade card is to ensure that you can run old arcade games at their native resolution and intended refresh rate, both vertical and horizontal, since this sometimes isn't even possible with regular video cards.

I don't think my video card will take any refresh rate numbers I throw at it, or any resolution I give it even if the monitor is ok.

As for quakeworld, it seems completely insane to want to run the screen at such low frequencies. The 154 I use is from quakeworld's sv_fps of 77 (77 * 2 = 154) so I can try to set 154 fps and get two refreshes per server frame. In practice things don't work so well, but w/e.

<< Comment #4 @ 13:39 CDT, 6 June 2014 >>

(Link, Reply)

skint

You can get even cheaper (probably free) older cards if you want 15khz using Soft-15khz.

http://wiki.arcadecontrols.com/wiki/Soft-15khz

list of cards

<< Comment #5 @ 14:46 CDT, 6 June 2014 >>

(Link, Reply)

CMSS

i got 60hz?

<< Comment #6 @ 00:37 CDT, 7 June 2014 >>

(Link, Reply)

Gibaholic

15khz = 1500hz no..??

<< Comment #7 @ 01:00 CDT, 7 June 2014 >>

(Link, Reply)

inTheory - Reply to #6

15000 :)

<< Comment #8 @ 03:16 CDT, 7 June 2014 >>

(Link, Reply)

Gibaholic - Reply to #7

so, in theory, if i have a gpu capable of outputting the resolution properly onto the screen, and can run QW at that fps or an integer of it and at that resolution then it should be smooth as fuck right? or am i misunderstanding when they say 15khz

Edited by Gibaholic at 03:19 CDT, 7 June 2014

<< Comment #11 @ 11:21 CDT, 7 June 2014 >>

(Link, Reply)

inTheory - Reply to #8

what lorfa said.
Can your hardware do 15k fps in QW?

<< Comment #9 @ 03:19 CDT, 7 June 2014 >>

(Link, Reply)

Lorfa ' - Reply to #6

15000 and this is regarding the horizontal refresh of CRT displays, which is how fast it draws the horizontal lines from one side to the other, not how fast it can draw the whole screen with these lines.

This site gives the formula for calculating the maximum vertical refresh from the maximum horizontal:

VSF = HSF / number of horizontal lines x 0.95

For example on my display the number of horizontal lines is 600, since I'm in 800x600. I'm running ~100 kHz so that's:

100000 / 600 * 0.95 = 158.333333333 Hz

Since I'm running 154 Hz vertical scan frequency that's about right.

Edited by Lorfa at 03:20 CDT, 7 June 2014

<< Comment #10 @ 04:18 CDT, 7 June 2014 >>

(Link, Reply)

Gibaholic - Reply to #9

Alright, I'm an idiot. thanks!!

<< Comment #12 @ 11:47 CDT, 7 June 2014 >>

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Lacceh

seriously...

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