clear
power on
regs
op a0 55
# IY should now be set to 55
test iy = 55
op c8
# IY should now be set to 56
test iy = 56
# Wrap and Zero case --------------
power on
op a0 ff
# IY should now be set to ff
test iy = ff
op c8
# Should be: IY=0, Z=1
test iy = 0
test z = 1
# Negative case --------------------
power on
op a0 ef
# Clear S with ACC
op a9 01
# Should be: IY=EF, S=0
test iy = ef
test s = 0
op c8
# Should be: IY=F0, S=1
test iy = F0
test s = 1
save verify_C8.txt