Path: utzoo!attcan!uunet!mcsun!hp4nl!dnlunx!martijn
From: martijn@dnlunx.pttrnl.nl (Reinalda M.)
Newsgroups: comp.sys.amiga.tech
Subject: Re: NCD on Amiga?
Message-ID: <4961@dnlunx.pttrnl.nl>
Date: 14 Dec 90 08:30:26 GMT
References: <4411@dnlunx.pttrnl.nl> <1168@teslab.lab.OZ>
Organization: PTT Research Neher Laboratorium
Lines: 53

andrew@teslab.lab.OZ (Andrew Phillips) writes:

>In article <4411@dnlunx.pttrnl.nl> martijn@dnlunx.pttrnl.nl (Reinalda M.) writes:
>>Does anyone know if there's a change dir command for the amiga
>>like the MS-DOS (bwaah!) Norton Change Dir (NCD). 
>>NCD creates an image of the hard-disk directory structure, so it
>>can immediately change to a given dir. Well, most of us are unhappy
>>enough to work with PC's in the (un)real world so you'll probably know
>>what NCD does.

>Unfortunately I have worked with MSDOS on and off for 8 years but I
>haven't used NCD.  I presume it has a TSR part which stores an image
>of the whole hard disk directory structure in memory.  Then the NCD
>command itself accesses this so that you can change to another
>directory immediately by not having to scan all the disk directories
>in the specified path.

>Fortunately the Amiga has a different disk format so that it does not
>need to scan a whole directory to find an entry.  So when you do a 

>    CD \APP\WIN\SYSTEM

>under MSDOS, CD has to do three (linear) searches of three
>directories.  (If one or more of these directories are very large it
>can take a long time.)  On the other hand on the Amiga a similar CD
>would not require linear searches (it uses a hash table) and so would
>be relatively instantaneous.

>So the answer is that the Amiga disk format makes an Amiga NCD unnecessary.
>Andrew Phillips (andrew@teslab.lab.oz.au) Phone +61 (Aust) 2 (Sydney) 289 8712

I'm sorry, maybe I didn't make myself clear or you're just missing the
point. Example :

 Let's say there's a directory DH0:programs/graphics/sculpt/objects 

Then I wanna type : NCD objects

and the computer should automaticaly know where that directory is located
( I don't care how) and perform a : 

CD dh0:programs/graphics/sculpt/objects 

It also should not matter in what directory I am on the moment of giving
the NCD command. 


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