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:DRAM:CREate DIAGnostic:DRAM:CREate < size><num_drivers> creates a non-volatile
RAM area for loading instrument drivers. DIAGnostic:DRAM:CREate 0
removes the RAM segment when the system is re-booted.
Parameters Parameter
Name
Parameter
Type
Range of
Values
Default
Units
size numeric 0 to available RAM or
MIN| MAX
none
num_drivers numeric 0 to available RAM or
MIN| MAX| DEF
8
Comments • size is the number of bytes to be allocated to DRAM use. A size of zero
will remove the DRAM segment.
• num_drivers is the maximum number of drivers to be loaded.
• The DRAM segment will be created only after the System Instrument has
been re-booted (cycle power or execute DIAG:BOOT).
• Based on the size specified, DIAG:DRAM:CRE rounds the size up to an
even value.
• DRAM will de-allocate previously allocated NRAM and RDISk
segments.
• Using all of the available RAM (MAX) for the DRAM segment will limit
some functions such as IBASIC program space, instrument reading
storage space, and full functionality of the Display Terminal Interface.
• Use DIAG:DRIVer:LOAD... and, DIAG:DRIVer:LIST...? to load and
manage DRAM.
• Related Commands:DIAG:DRAM:AVAilable?,
DIAG:DRIVer:LOAD..., DIALG:DRIVer:LIST...?.
Example Allocate a 15 Kbyte non-volatile Driver Ram segment.
DIAG:DRAM:CREate 15360 allocate 15 Kbyte segment of
Driver Ram.
:DRAM:CREate? DIAGnostic:DRAM:CREate? [< MIN| MAX> ,< MIN| MAX| DEF> ] returns
the size (in bytes) of a previously created non-volatile RAM area for loading
instrument drivers, and the number of drivers currently loaded.
• size is the number of bytes currently allocated to DRAM use.
• num_drivers is the number of drivers currently loaded.
DIAGnostic:DRAM:CREate
7-16 System Instrument Command Reference