CP/M 2.2 Sector Translation Question

Chuck Guzis cclist at sydex.com
Thu Jan 22 17:56:01 CST 2009


On 22 Jan 2009 at 18:30, ROBO5.8 wrote:

> I'd like to know if CP/M 2.2 is "Zero" biased when it comes to Sector
> Translation.  Since v2.2 supports Blocking/Deblocking I would assume it has
> to be.  I've looked at lots of code examples via Google and searched the
> documentation but I cannot find a statement to that effect.
> 
> Asking it another way:  The Sector Translation routine is passed the
> requested sector number in Registers B&C.  Does CP/M request Sector 0 or 1
> when it wants the first sector on any track.

Yes, it's zero-based.

--Chuck




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