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Is it possible??

I heard it's hard to do..I have the PAL-I SMS2

KnightWarrior wrote

Is it possible??

I heard it's hard to do..I have the PAL-I SMS2

I recently did this, had a few issues but got it to work.
First check, your RF adapter may automatically output NTSC if connected to an NTSC TV.

Regardless here is the topic url for the mod I performed :

http://www.smspower.org/forums/viewtopic.php?t=13211

Cheers!
Gerry[/url]

*You would need to change master clock to NTSC one, you can grab one from a MD/Genny
*You got to lift a pin on RGB encoder and tie to to 5V, that makes it work in NTSC mode
*You got to cut color subcarrier line and then feed CPU clock into it. There is a LPF on the line so make use of it, otherwise you'll get excessive "jail-bars"

If you cannot get NTSC master clock oscillator you need to build your own oscillator with NTSC color subcarrier crystal for the RGB encoder, but that way you'll have nastily moving dot crawl artifacts

Author	Message
KnightWarrior Joined: 19 Feb 2009 Posts: 98	PAL SMS 2 NTSC Mod Posted: Wed Dec 28, 2011 10:11 pm
KnightWarrior Joined: 19 Feb 2009 Posts: 98	Is it possible?? I heard it's hard to do..I have the PAL-I SMS2

Gerry_MAN Joined: 11 Dec 2009 Posts: 204 Location: Canada	Posted: Sun Jan 08, 2012 2:59 am
	KnightWarrior wrote Is it possible?? I heard it's hard to do..I have the PAL-I SMS2 I recently did this, had a few issues but got it to work. First check, your RF adapter may automatically output NTSC if connected to an NTSC TV. Regardless here is the topic url for the mod I performed : http://www.smspower.org/forums/viewtopic.php?t=13211 Cheers! Gerry[/url]

TmEE Joined: 31 Oct 2007 Posts: 853 Location: Estonia, Rapla city	Posted: Sun Jan 08, 2012 3:33 am
	You would need to change master clock to NTSC one, you can grab one from a MD/Genny You got to lift a pin on RGB encoder and tie to to 5V, that makes it work in NTSC mode *You got to cut color subcarrier line and then feed CPU clock into it. There is a LPF on the line so make use of it, otherwise you'll get excessive "jail-bars" If you cannot get NTSC master clock oscillator you need to build your own oscillator with NTSC color subcarrier crystal for the RGB encoder, but that way you'll have nastily moving dot crawl artifacts

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