Re: Apple model history?

[pausch@saafNOSPAM.se (Paul Schlyter)]

In article <38F5F345.120F0854@inetnebr.com>,
Roy and/or Janet Miller  <millers@inetnebr.com> wrote:
 
> Paul Schlyter wrote:
>  
>> There was a freeware CCP replacement for CP/M though, ZCPR, which
>> used these user areas to implement what looked like subdirectories.
> 
> The "Zipper" was a valuable improvement over the CCP (for those who
> don't know CP/M but do know MS-DOS, CCP is similar to command.com), but
> I didn't know that it was freeware - is this a recent reclassification?
 
ZCPR always was freeware -- but the ZDOS (BDOS replacement) below it
was a commercial product.
 
> There was also a "Zipper 3", like CP/M 3.0, which had memory management
> like SOS/ProDOS, did it have a hierarchical filing system?
 
Only one level deep though -- I'm doubtful if that's deep enough to
classify it as "hierarchial"....
 
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