Detecting for NTSC or PAL

[tepples]

Shouldn't that be $2002 (PPUSTATUS), not $2007 (PPUDATA)?

Code: Select all

         
        lda $2007
        sta ntsc_if_neg

Sorry for sounding like a noob, but what exactly would the value be in $2007 at this point if it was PAL? 0?

The state of $2002 after this many cycles of PAL could be any number from 0 to 127, depending on the state of the sprite hardware and various internal PPU buffers, but bit 7 will be clear. You can 'bpl' to test this number: 'bpl' is taken if PAL (was "branch if PLus" now "branch if PaL"), 'bmi' if NTSC.

[Sivak]

I saw the revised code. Thanks for the assistance, PAL emulation on 3 different emus produces the new results.

I originally had this configurable in the option screen, but now this test works. Kinda cool that my game is "region-free". 8)