Re: Auto Boot

From: Greg King <>
Date: Sat, 13 Apr 2013 03:36:07 -0400
Message-id: <998943B0C01D43899C5C97606741B68F@Kaiser>
From: "Spiro Trikaliotis"; on Saturday, April 13, 2013; at 2:13 AM -0400
> * On Sat, Apr 13, 2013 at 04:07:47AM +0000, William Levak wrote:
>> On Fri, 12 Apr 2013, silverdr wrote:
>>>> "0:?*" is only necessary if you got a "file not found" error,
>>>> where the next load might try to load from the non-existant drive 1.
>> >
>> >Wouldn't, in such case, a "0:*" still be sufficient?
>> Since you have previously referenced a file, "*" now means last file
>> referenced.
> Have you actually tested that?
> Yes, you are right, "*" references the last file. However, silverdr told
> you to use "0:*", which does NOT reference the last accessed file, but
> the first file on drive 0.
> We tried to explain this to you more than once.
> BTW: EVen your first argument does not hold. If you try to load a file
> that does not exist, and afterwards, you try to load "*", you get the
> first file (again).

William seems to be confused about what the DOS actually tests.

When the DOS wants to know whether or not a programmer wants the "last
openned file", it looks at the _entire_ string; it doesn't examine _only_
the file-name.  The two strings "*" and "0:*" have the same file-name
(pattern) _inside_ them; but, the first character in each _entire_ string
is different.  In the first string, the initial character is a punctuation
mark; in the second string, the initial character is a digit.  That is what
the DOS sees -- the _very first_ character, in the second string, isn't an
asterisk; therefore, that string doesn't say, "most recently openned file".

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Received on 2013-04-13 09:00:03

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