RAMDISK Driver

Purpose:  RAMDISK is a virtual disk driver that permits to store the user
          programs or data in unused memory.

Syntax:   DEVICE[HIGH] = [FullPath]RAMDisk.sys
                           [NNNNN[K:M]] [DDDD] [/parm1...]

Description:
     This driver version makes it possible to use three sorts of memory to
create the virtual disk:

    - Conventional memory. The only type accessible in XT machines.  We do
not recommend you to create too large virtual disk on the basis of this kind
of memory since it sharply reduces the amount of memory available for user's
programs. Usually virtual disk in conventional memory is created on machines
whithout hard disk with the only purpose of housing Command.Com.

    - Extended memory. This is a memory residing in address space above 1 Mb
and accessible only when processor operates in protected mode. The memory
can be rather large and is well suited for a rapid disk.

    - Expanded memory. This memory is also located over 1 Mb and has an
access window in accessible address space. It can be very large. Memory
abundance can be used to create a virtual disk.

Description of parametres:

NNNNN  - volume of required memory in Kb (if K is specified or if there
         are no specifications) or in Mb if letter M is added after
         the first digit;
DDDD   - number of root directory entries (minimum 16).
param1, param2, ...
       - letter parameters:
         A - place operational disk area in available Expanded memory;
         E - move operational disk area to Extended memory;
         L - switch on disk access indication via ScrollLock LED (at AT
             keyboards).

     The driver requires presence of Extended/Expanded  memory drivers,
depending on chosen memory type (HiMem.sys, EMM386.sys, etc).

     If E or A parametres are not specified then the disk will be located in
the conventional memory.

     If only one number is specified, it is considered to be the disk
capacity; the number of root directory entries in this case is equal to 64.

     If no numbers are specified then the disk capacity is set, depending on
the letter parameters as:  - 64 Kb in conventional memory; - or all
available Extended memory; - or all available Expanded memory.

     The specified disk capacity includes FAT and root directory.