Subj : Re: how to detect cdrom?
To   : Jasen.Betts@xspamp42.f531.n640.z3.f
From : Outsider
Date : Sun Feb 10 2002 10:06 am

From: Outsider@f3.n342.z1.cereal.mv.com (Outsider)
Subject: Re: how to detect cdrom?

From: Outsider <nonvalid_email@yahoo.com>

Jasen.Betts@xspamp42.f531.n640.z3.fidonet.org wrote:
>
> Hi Outsider.
>
> 08-Feb-02 08:03:56, Outsider wrote to Outsider
>
>  O>   ECHO %1|CHOICE /N/CABCDEFGHIJKLMNOPQRSTUVWXYZ >NUL
>  O>   FOR %%d in (C D E F G H I J K L M N O P Q R S T U V W X Y Z) do IF
>  O> errorlevel H%%d set ramdrive=%%d
>
> what version of dos does that need to work? (it sure doesn't work here with
> 6.22)

I should have explained that part of the batch. The above code works if the
correct drive letter is passed as parameter one only. I used it for
verification purposes.

This is not errorlevel, it is called bennylevel, and works like this:

  Findramd.exe
  For %%D In (C D E F G H I J K M N O P Q R S T U V W X Y Z) Do If ErrorLevel
H%%D Set RAMD=%%D


>  O> I prefer the simple batch method to find the RAMdrive for two reasons.
>
> what simple batch method?
>

Simply this.
The RAMdrive letter is easy enough to find from a boot disk with a simple batch
file. This method presumes that the RAMdrive has been correctly loaded, so that
responsibility goes to you and your bootdisk. Since a RAMdrive is assigned
after logical drives, the last writeable drive, excluding Z (which is the CD
drive), is the RAMdrive - or the last RAMdrive if more than one is present.


:: bframdrv.bat (Boot - Find RAM DRiVe BAT)
@ECHO off
IF not "%1"=="" GOTO recurs
CTTY nul
%0 c d e f g h i j k l m n o p q r s t u v w x y
:recurs
ECHO.> %1:\$flag1.tmp
COPY/B/Y %1:\$flag1.tmp+,, %1:\
IF exist %1:\$flag1.tmp SET ram=%1
IF exist %1:\$flag1.tmp DEL %1:\$flag1.tmp SHIFT
IF not "%1"=="" GOTO recurs
CTTY con
::
:: This batch gives you the RAM drive letter w/o pipes.
:: Once you find out where the RAM drive is, the %temp%
:: can then be set to it, afterwhich you may use pipes.


Occupies only one cluster on a 1.4MB floppy.

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