rom
Allocate ROM to the VM
Synopsis:
rom [start_address,]lengthDescription:
The rom component allocates ROM to the VM, at the guest-physical address specified by start_address for the number of bytes specified by length.
This option is the same as the ram option, except that the guest isn't allowed to write to this memory. Typically, you would use the load option to place some initialized data into the region specified by rom before the guest starts.
If you don't specify this option, by default the qvm process allocates the ROM immediately following the highest RAM/ROM address already allocated in the system.
When you specify the length argument, you can use either
hexadecimal notation (e.g., 0xa0000 for 640 KB), or human-readable
abbreviations (e.g., 1M for 1 MB).
You must allocate ROM before components that refer to the guest memory (see
Exceptions
in the Configuration
chapter).
ROM that appears to the guest as contiguous is unlikely to be contiguous in host-physical
memory (see Memory
in the Understanding QNX Virtual Environments
chapter).
Example:
0xc0000:
rom 0xc0000,0x40000The start address for the memory allocation is the address inside the VM: the guest-physical address (intermediate physical address).