Symbol PDT 3400 Series, Product Reference Manual

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7-1
Chapter 7
Terminal Configuration: Loading a RAM Disk
Loading a RAM Disk
RAM disks allow the PDT 3400’s RAM to be organized as a simulated disk to allow writable
data storage. To create one or more RAM disks, use the Symbol RAM disk driver
RDISK34T.SYS which is included as part of the Symbol PDT 3400 SDK.
Protected RAM Disk
Symbol’s RAM disk driver (RDISK34T.SYS) provides the capability to create a protected
RAM Disk in expanded memory.
Note: The Expanded Memory Manager, VG230EMS.SYS, must be loaded
before RDISK34T.SYS to provide EMS memory for use by the RAM
Disk. For details on loading the Expanded Memory Manager, refer to
the section VG230EMS.SYS in Chapter 4.
To create a RAM Disk using RDISK34T.SYS, add the following line to CONFIG.SYS:
DEVICE=RDISK34T.SYS xxx
where xxx is the RAM Disk’s decimal size in kilobytes. This size is rounded up to the nearest
16K, but does not exceed the amount of available expanded memory. If the size parameter is
omitted, all available expanded memory is used by the RAM Disk.
Include the /NOPROTECT switch following the size to specify that the RAM Disk is not to
be preserved across warm reboots or protected from corruption by errant programs.