$ VBoxManage modifyvm “vm-name” –memory 256 –acpi on –ioapic off –pae on –hwvirtex on –nestedpaging on

where

- memory 256 assign 256 Mb RAM

- acpi on enable ACPI (mandatory if you use Winfog 2000

- ioapic off disable the IO APIC. Not useful if you use one CPU (on virtual machine or a 32 bit operative system). As ACPI, this switch is mandatory for Winbug 2000

- pae on enable the Phisical Address Extension how to use more than 4Gb of RAM on x86 CPU

- hwvirtex on enables hardware virtualization extensions for microprocessors that have this feature (which should be also enabled in the BIOS of the motherboard)

- nestedpaging on allows part of the processes of memory management hardware are made directly

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by David Winterbottom (codeinthehole.com)


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