Hi,
Can you check the following lines of asm to see if interpretation is correct?
Thanks

Wait for vertical blanking interval bit to be set
LXXXX:
LDA $2002
BPL LXXXX

Wait for vertical blanking interval bit to be set
LXXXX:
LDA $2002
AND #$80
BEQ LXXXX

wait for vertical blanking interval bit to be cleared
LXXXX:
LDA $2002
BMI LXXXX

Isn t it a bit weird to wait for vertical blanking interval bit to be cleared, since a read to 2002 clears it?