Automatic PAL/NTSC mode select (from Napalm FAQ)
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You can use this little piece of code to automatically switch to PAL or 
NTSC (although it may not work on all bioses, if you have any problems 
with it, just mail me with the bios ver and fix(?) so I can post a 
corrected version here)

/* E(urope) --> PAL; A(merica) and J(apan) both use NTSC */
if (*(char *)0xbfc7ff52 == 'E')
    SetVideoMode(1);     // PAL
else
    SetVideoMode(0);     // NTSC

This only works if (*(char*)0xbfc00102==95)
(stands for 1995, the bios date, if it's 94, you're running on a SCPH1000)
Just get out your favourite hex editor, and have a look at a bios dump

part of code from DLCM:
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#define MODE_AUTO -1

main()
{
    ...
    InitGraphics(MODE_AUTO);
    ...
}

/* 0x80010ba4 */
void InitGraphics(int mode)
{
    if(mode == MODE_AUTO)
    {
        ((*(u_char *)0xbfc7ff52 ^ 'E') < 1) ? 
            (mode = MODE_PAL) : 
            (mode = MODE_NTSC);
    }

    SetVideoMode(mode);

    ...
}

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DON'T WORKS WITH SCPH1000.BIN !!!!!
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