22-10
CPU power management
PC-500 user’s manual
In a .PMI file, the following option is available:
pmi-enable=Y/N
Disables/enables the power management code
System timers
The system timers define the delays associated with power state transi-
tions in the system. Three managed system power modes (in addition to
full on) are supported, DOZE, STANDBY, and SUSPEND. Individual
timers for system devices, including floppy disk, hard disk, and serial ports
are also provided. The timers are described below:
In a .PMI file, the following options are available:
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)
doze-delay=x
Sets DOZE time-out before STANDBY(x=0,2,8 seconds)
standby-delay=xx Sets delay time before STANDBY (x=0-31 minutes)
suspend-delay=xx Sets delay time before SUSPEND (x=0-31 minutes)
Doze timer enable and resets
The DOZE mode may be selected to be a SLOW clock or STOP clock mode
and is determined in power management SETUP. Numerous sources may
reset the DOZE timer, preventing entry to DOZE mode. The BIOS as-
sumes that video, floppy, hard disk, and keyboard accesses should all reset
the DOZE timer. In addition, various interrupts can be configured to reset
the timer. DOZE timer 0 is used for all DOZE reset selections. DOZE
timer 1 is used for the special case of the timer interrupt in a STOP clock
mode. In this mode, DOZE timer 1 is configured for a 4 millisecond time-
out, with only IRQ0 configured to reset DOZE timer 1. This allows the
CPU to resume normal operation for 4 mS on each IRQ0 in order to main-
tain the time of day.
In the PC-500 SETUP, the following options are available:
Power Management:
ENABLED or DISABLED
DOZE Clock (Slow, Stop):
SLOW or STOP
Time Updated After Suspend:
ENABLED or DISABLED
Interrupts that reset DOZE are configured in a .PMI file:
irq0-reset-doze=Y/N
Enables reset of DOZE clock if IRQ0 occurs
irq3-reset-doze=Y/N
Enables reset of DOZE clock if IRQ3 occurs
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 ...