Version 1.2.3
When the CPI/CPD/CPIR/CPDR instructions are executed, the specification is to set the P/V flag if the result of decrementing BC is not zero, and reset it if it is zero, but the situation is reversed.
When the CPI/CPD/CPIR/CPDR instructions are executed, the specification is to set the P/V flag if the result of decrementing BC is not zero, and reset it if it is zero, but the situation is reversed.