CGA/EGA/YUV to VGA HD-Converter PCB ? how can this be any good?

[XNIF]

Can someone explane to me (i'm a n00b) how this can be any good? I mean the monitor that i have is  PC monitor CRT 21" for my mame project, and it does not ever do anything else under 31Khz. So how can a converter make my scanlines look like an arcademonitor?  Is it worth buying....?  Does it work for mame...?

Thank you for you patience

[BobA]

To work properly the converter has to up convert the arcade signal  to the higher resolutions.   Do you have a link to the specific converter you are looking at?

[XNIF]

Well something like this http://www.jammaboards.com/store/cga/ega/yuv-to-vga-converter-pcb-gbs-8220/prod_291.html

[bji]

Can someone explane to me (i'm a n00b) how this can be any good? I mean the monitor that i have is  PC monitor CRT 21" for my mame project, and it does not ever do anything else under 31Khz. So how can a converter make my scanlines look like an arcademonitor?  Is it worth buying....?  Does it work for mame...?

Thank you for you patience

You can get 'real' scanlines on a 21 inch high resolution monitor if you can control the screen resolution to a fine degree (Linux lets you do this, Windows probably does not).  See this thread in the Mameworld forums and in particular this post:

http://www.mameworld.info/ubbthreads/showthreaded.php?Cat=&Number=223773&page=2&view=expanded&sb=5&o=&fpart=1&vc=1

The basic problem is that high resolution monitors have very thin scanlines, so although you can get true hardware scanlines at low resolutions, it doesn't look very good.  I think the best solution is to use a very high resolution and simulate scanlines, but that requires good support from the program (MAME doesn't do this).  I am working on my own version of MAME that does do this, however; but I'm nowhere close to done.

All that being said, I highly doubt that the card you are looking at does scan lines.  It probably just scales the input to the output smoothly.  So you wouldn't see anything better than if you just used MAME to stretch the game to a bigger resolution.

[romshark]

That board is designed to convert from 15khz and 25Khz to 31khz. That means you can use it to connect real arcade circuit boards to your computer monitor. I have one (an older model) that let's me play my arcade PCBs in the same cabinet as my MAME machine.
If you're just using a MAME PC to a PC monitor, that board will be of no use to you.

[XNIF]

Thank you all for you help. I now understand that it's no use for me. I just stick to the normal output from mame to my IBM P260.