Blitter collision may have a problem

[djipi]

hello

after blitter collision test call, i test the status register of the blitter and i change the Background color if collision

    move.l	B_CMD,d0
and.l	#%11,d0			; bit0 : 1=idle, bit1 : 1=stopped

btst	#1,d0
beq.s	pas_de_collision
move.w	#$7700,BG

pas_de_collision:

result on phoenix :

https://www.mirari.fr/1SLo

Originally posted by @ericde45 in https://github.com/ericde45/JAG_collisions/issues/1#issuecomment-1092459152