Can anyone confirm this ?

Ask anything your want about Megadrive/Genesis programming.

Moderator: BigEvilCorporation

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What system(s) do you have ?

European Mega Drive
8
47%
Japanese Mega Drive
0
No votes
US Genesis
5
29%
Euro and Jap
3
18%
Euro and US
0
No votes
US and Jap
0
No votes
All of them
1
6%
 
Total votes: 17

TmEE co.(TM)
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Can anyone confirm this ?

Post by TmEE co.(TM) » Thu Feb 22, 2007 7:11 pm

To check this you need a MD with PAL/NTSC switch.

OK, I run GBMD and I thought "GBMD uses PAL 240 pixel vertical res, what if I switch to NTSC ?" I switched to NTSC and the screen started to roll.
Does it happen only on my TV or it happens with everyone else ?
Mida sa loed ? Nagunii aru ei saa ;)
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Files of all broken links and images of mine are found here : http://www.tmeeco.eu/FileDen

Fonzie
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Post by Fonzie » Thu Feb 22, 2007 7:28 pm

TmEE, if you force 240 lines... héhé, it will roll for sure on a NTSC system because he'll take 16 more lines in his face and loose synchro.
The idea is to always stay in 224lines (224 works for both NTSC and PAL) :D

Stef
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Post by Stef » Thu Feb 22, 2007 8:26 pm

I replied Jap and Eur, unfortunatly my JAP MD is broken :-(

LocalH
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Re: Can anyone confirm this ?

Post by LocalH » Thu Feb 22, 2007 11:36 pm

TmEE co.(TM) wrote:To check this you need a MD with PAL/NTSC switch.

OK, I run GBMD and I thought "GBMD uses PAL 240 pixel vertical res, what if I switch to NTSC ?" I switched to NTSC and the screen started to roll.
Does it happen only on my TV or it happens with everyone else ?
Not with this particular piece of code, but I've run other 240-line code and it does indeed roll.

TmEE co.(TM)
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Post by TmEE co.(TM) » Fri Feb 23, 2007 6:47 am

But what happens if you use such PAL configuration with NTSC TV ? Still rolls ?
Mida sa loed ? Nagunii aru ei saa ;)
http://www.tmeeco.eu
Files of all broken links and images of mine are found here : http://www.tmeeco.eu/FileDen

LocalH
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Post by LocalH » Sat Feb 24, 2007 5:47 am

That's what I'm talking about. The code I tested put the VDP into 240 line mode, and both my Gen1 and 2 exhibited the same thing - screen starts rolling madly. Both systems are stock NTSC systems.

TmEE co.(TM)
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Post by TmEE co.(TM) » Sat Feb 24, 2007 10:21 am

OK, I've found the supreme regional lockout scheme 8) but only for PAL stuff... Don't worry, although my current project is PAL only (an will roll on NTSC), but if it's finished. I'll make a NTSC tuned version.
BTW, is there any need for NTSC GBMD ?
Mida sa loed ? Nagunii aru ei saa ;)
http://www.tmeeco.eu
Files of all broken links and images of mine are found here : http://www.tmeeco.eu/FileDen

jobro
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Post by jobro » Sat Jul 14, 2007 3:56 pm

All of them, since I use an emulator.

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