Region autodetection for PAL/NTSC

[dale_coop]

Thanks, it's a strange behavior over all.

Here is the intialization script (what should be totally okay, it's the version I last saved in june 2022 since when it worked well) ...

Try changing those lines:

    JSR getTVSystem
    ;;;; lda #SOUND_REGION_NTSC ;or #SOUND_REGION_PAL, or #SOUND_REGION_DENDY
    sta sound_param_byte_0

Into:

    LDA #1
    STA skipNMI
    JSR getTVSystem ; loads region instead of hardcoding it
    ;;;; lda #SOUND_REGION_NTSC ;or #SOUND_REGION_PAL, or #SOUND_REGION_DENDY
    sta sound_param_byte_0
    LDA #0
    STA skipNMI

Let me know if it helps with your issue.

 

[force73]

Try changing those lines:

    JSR getTVSystem
    ;;;; lda #SOUND_REGION_NTSC ;or #SOUND_REGION_PAL, or #SOUND_REGION_DENDY
    sta sound_param_byte_0

Into:

    LDA #1
    STA skipNMI
    JSR getTVSystem ; loads region instead of hardcoding it
    ;;;; lda #SOUND_REGION_NTSC ;or #SOUND_REGION_PAL, or #SOUND_REGION_DENDY
    sta sound_param_byte_0
    LDA #0
    STA skipNMI

Let me know if it helps with your issue.

Thanks for your code but unfortunately it didn't changed anything. PAL music still slower.