IBM Mother Board 486F39X, User Manual

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Standby Timer
:
Setting range from “10 Sec” to “1 Hr” and
“Disable”.The CPU and the VESA Local Bus operation frequency slows
down to 8 MHz and the video signal is suspend if no Power Management
events occur for a specificed length of time. Full Power functions return
when a Power Management event is detected.
Suspend Timer : Setting Range from “10 Sec” to “1 Hr” and “Disabled”.
The VESA Local Bus operating frequency slows down to 8 MHz, the
CPU clock is stopped
, the video signal is suspended, and the “SM
Outs”(JP2, JP3) are drived to logic low, if no Power Managment events
occur for a specificed length of time. Full power functions return when a
Power Management event is detected.
Video RAM Access AOOO-BFFFh :The default setting
this option to enabled to permit local bus access to the
in system memory at AOOOh - BFFFh.
is “Disabled”. Set
video BIOS area
Local Bus Master Access
:
Set this option to “Enabled” to permit local
bus master device access. The defaults setting is “Enabled”.
DMA Request : Set this option to “Enabled” to permit local bus DMA
requests. The defaults setting is “Enabled”.
System IRQ Events
:
monitored. If you are not
enable every IRQ except
Operation System.
These features determined which IRQs are
sure which IRQs s h o u l d be monitored, just
IRQ8. IRQS can only be enable under OS2