22-6
CPU power management
PC-500 user’s manual
Refer to the default .PMI file in the Power management configuration
section in this chapter for all of the power management options.
STANDBY mode is similar to hardware DOZE mode, except that it is
firmware controlled and devices may be power managed as well as the
CPU clock. STANDBY is controlled by software, such as POWER.EXE.
Since the CPU may still be executing in STANDBY mode, access events
may RESUME the system in addition to external inputs, such as inter-
rupts. The firmware must configure the chipset to report these events to
the firmware via an SMI. This allows the hardware to restore the CPU
clock while notifying the firmware to restore power to the managed de-
vices. On RESUME from STANDBY mode, all devices which cannot
generate an access SMI are powered up and those which can generate an
access SMI are powered up if specified in CMOS. Any device access or
specified interrupt can cause the system to RESUME.
How to initiate the STANDBY option
1. In the PC-500 SETUP and in a .PMI file, enable power management and
select the following options:
SETUP:
Power Management:
ENABLED
DOZE Clock (Slow, Stop):
SLOW
Time Updated After Suspend:
ENABLED
TEST.PMI:
pmi-enable=Y
Enables the power management
standby-delay=xx
Sets delay time before STANDBY
(x=0-31 minutes)
fdd-to=xx
Sets the on-card (LPT1) floppy disk drive
time-out value (x=0-31 minutes)
hdd-to=xx
Sets the hard drive time-out value
(x=0-31 minutes)
COM1-to=xx
Sets the COM1 time-out value (x=0-31 minutes)
COM2-to=xx
Sets the COM2 time-out value (x=0-31 minutes)
Set the time delay, in minutes, for the “standby-delay” option and devices
to be powered down, such as drives and serial ports.
Note
The hard drive and floppy drives are actually controlled by firmware and
not by software such as POWER.EXE. The floppy must be on-card, con-
trolled from the LPT1 port.
2. In the same .PMI file, select any signal that will cause the system to
resume. The options only include IRQs.
Summary of Contents for PC-500
Page 7: ...Notice to user PC 500 user s manual ...
Page 17: ...xii Contents PC 500 user s manual ...
Page 23: ...About this manual PC 500 user s manual ...
Page 25: ...Overview of Section 1 PC 500 user s manual ...
Page 35: ...2 2 Quick start PC 500 user s manual Figure 2 1 PC 500componentdiagram ...
Page 36: ...2 3 PC 500 user s manual Quick start Figure 2 2 PC 500center to centerholedimensions ...
Page 53: ...3 10 SETUP programs PC 500 user s manual ...
Page 57: ...4 4 Save and run programs PC 500 user s manual ...
Page 59: ...Overview of Section 2 PC 500 user s manual ...
Page 71: ...5 12 Serial ports PC 500 user s manual ...
Page 75: ...6 4 LPT1 parallel port PC 500 user s manual ...
Page 81: ...7 6 Console devices PC 500 user s manual ...
Page 89: ...10 2 IRQ routing and opto IRQs PC 500 user s manual Figure 10 1 Interruptroutingmatrix ...
Page 103: ...11 12 EZ I O PC 500 user s manual ...
Page 117: ...14 2 PC 104 expansion PC 500 user s manual ...
Page 119: ...15 2 SCSI PC 500 user s manual ...
Page 121: ...16 2 Ethernet PC 500 user s manual ...
Page 123: ...Overview of Section 3 PC 500 user s manual ...
Page 127: ...17 4 Watchdog timer and hardware reset PC 500 user s manual ...
Page 143: ...19 8 Transferring files remote disks PC 500 user s manual ...
Page 173: ...22 22 CPU power management PC 500 user s manual ...
Page 177: ...23 4 Troubleshooting PC 500 user s manual ...
Page 179: ...Overview of Section 4 PC 500 user s manual ...
Page 225: ...B 28 Software utilities PC 500 user s manual ...