jump if bit set and clear (jbc) has 3 bytes:
0x10 - the instruction 0xbit - the bit number 0xoff - the relative pc offset to take if bit set
the question is, which pc is the 'off' relative to?
In other words, if my program has:
pc code ------------- 5 0x10 6 bit 7 off
is the 'off' relative to pc = 7 or pc = 8 or some other pc?