## The PCD is used to specify memory base address for OPROM to find free memory.\r
# Some OPROMs do not use EBDA or PMM to allocate memory for its usage, \r
# instead they find the memory filled with zero from 0x20000.\r
## The PCD is used to specify memory base address for OPROM to find free memory.\r
# Some OPROMs do not use EBDA or PMM to allocate memory for its usage, \r
# instead they find the memory filled with zero from 0x20000.\r