User`s guide

SET VM
(VM)
Sets the VM (Virtual Memory) handler.
Format
SET VM condition
Condition
BASE=nnnnnn
Lets you select the location in memory where block 0 of a virtual disk will begin
(the base address). The VM handler uses memory at and above nnnnnn, a
physical address multiplied by 100
8
.
Since the base address is a 22-bit address that must be represented in 16 bits,
the bottom six bits (bits 0–5) are always 0. Therefore, when specifying the value
nnnnnn, use only the top 16 bits of the base address you want. For example,
if you want the base address to be 10025600
8
, specify 100256 for nnnnnn. The
default value for nnnnnn is 1600
8
under unmapped monitors and 10000
8
under
mapped monitors. (The address 10000 is the division between 18- and 22-bit
addresses.)
[NO]INSTAL
INSTAL, the default, causes the VM handler to install at the system boot.
NOINSTAL causes an otherwise valid VM handler to not install at the system
boot.
SIZE=nnnnnn
Lets you select the memory size in blocks (512 bytes for each block) of the virtual
device. If you SET VM SIZE=0, VM allocates all available memory from the SET
VM BASE value to the top of physical memory. VM SIZE=0 is the default.
RT–11 Command Descriptions 275