ACPI S2 and S3 different???

[boki]

Dear All:

For ACPI S2 and S3:

Sleep states. In these states, memory contexts are held but CPU
contexts are lost. The differences between S2 and S3 are in CPU
re-initialization done by firmware and device re-initialization.

For Windows XP / SP1 / SP2 or other Microsoft OS:

We can only use
S0, {S2, S3} , S4, S5
S0: Full speed
S4: Save RAM to disk.
S5: Turn off

Q1:
Which mode is the WINDOWS XP "stand by" mode ?

Q2:
Can we control S2/S3? or controlled by device/firmware?
Could you please describe more detail about S2 and S3 mode ?


Thank you very much for your help.

Best regards,
Boki.