What is Suspend to Disk Mode?
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ACPI S4 (Suspend to Disk) When a suspend to disk feature is activated, it writes the memory contents into a special partition, marks the partition as active, and shuts off the machine. To resume, the memory is restored, then the system boots from the special partition, and makes the OS partition active again. The conventional APM mode "Suspend to Hard Drive" function is a private design of AOpen motherboards. BIOS is required to take care all important registers in the chipset and the chipset itself must also support power management function. Because motherboard is an open architecture, there are many different add-on cards can be added on the motherboard, it is more difficult to support this function then the notebook close architecture. The add-on card (and chipset on it) is also required to support APM function, so that normally we will have a test report specify what kind of add-on cards have been tested with AOpen Suspend to Hard Drive. However, nowadays "Suspend to Hard Drive" has been become widely known as the "S4 - Hibernation" state defined in the ACPI specification; in this case not only the BIOS itself but also the operation system (i.e. Windows98) are involved in the execution of this function. Unfortunately, until now, only very few add-on card can support ACPI Suspend to Hard Drive. Another factor is normally, operating system and add-on cards will support Intel chipset with higher priority than non-Intel chipset. This makes Suspend to Hard Disk far more difficult to be supported on VIA chipset. In summary, Suspend to Hard Drive is not a formal specification of AX63, but we will still provide the BIOS for users who need this function. |
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