American Megatrends AMI 386SX, Preliminary Manual, Page: 28 / 52

The following User Selectable options require you to PRESS AND HOLD the
<CTRL><ALT> keys and at the same time press:
<DEL> This key sequence is called SOFT RESET. When this key sequence is
pressed the system reboots.
<+> This key sequence allows the system to jump to high speed of operation
(25MHz) with cache memory enabled for maximum system throughput. The
cursor changes to a block to indicate the change.
<-> This key sequence allows the system to jump to low speed of operation
(8MHz). Double line cursor indicates the switching.
<SHIFT><+> This key sequence enables the external cache memory to maximize
system throughput at high speed of operation.
<SHIFT><-> This key sequence disables the external cache memory to reduce
system throughput.