Formerly, determined the size of the map entry array used
for managing kernel virtual address space.
MAXPMEM
Formerly, if the value was non-zero, specified
the maximum amount of physical memory the kernel could use.
DO386B1
Formerly, controlled use of B1 Stepping software solutions
to problems in early i386 chip production.
This parameter was not to be set to ``1'' on Compaq processors.
DO387CR3
Formerly, controlled setting of high-order bits of Control
Register 3 (CR3) when an 80387 chip was installed.
This parameter was used to control a software solution needed to
solve i386/i387 timing problems in early chip production.