Clock Bits Protection

Clock Bits Protection

This is a protection where invalid GCR was used. Most commonly known as ‘weak bit’ protection. This was the most difficult protection to detect unless you were using a 1541-II or 1571 disk drive. Neither of these drives would ‘float’ invalid bits like a 1541 does. So, you can easily spot these and correct the data before being re-written. – Jim Drew

 

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