Just for clarification. About byte read from custom register ($dff005). If I understand correctly below code
Code:
wait_vb_2
.1 btst #0,(_custom+vposr+1)
bne .1
.2 btst #0,(_custom+vposr+1)
beq .2
rts
can be changed to (more legal)
Code:
wait_vb_2
moveq #1,d0
lea (_custom+vposr),a0
.1 move.w (a0),d1
and.w d0,d1
bne .1
.2 move.w (a0),d1
and.w d0,d1
beq .2
rts
Any comments are welcome especially If I am wrong.