Mapper 422 ( and variants): At least 1 cart has broken graphics about punes HOT 4 CLOSED

I have integrated the inversion of bit 5 by disabling it for the old dumps in order to still make them playable.

from punes.

it appears that the update broke some mapper 422 boards and both in 126(there's only 2 carts). so not sure what NRS' notes about this change since its already on nesdev.

the specific issue is inverting bit5 of register 0

from punes.

Thanks for the report, I missed the note on bit 5. You are right by inverting bit 5 there are problems with the chr in some dumps 422 and the two 126 but it could depend on what is reported in the note on nesdev Older dumps do not take this inversion into account..

from punes.

ic. i missed that last note of the inverted bit (took the glance, never read it whole). thanks for the clarification. so older dumps are bad then.

from punes.