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2 System Board
Devices on the ISA Bus
❒ For the Ultra I/O space: the Serial EEPROM, serial port, parallel port
and mass storage drives (disable write on Flexible Disk Drive, disable
boot on any drive, disable use of any embedded drive)
• Advanced Power Management (APM) version 1.2
• Glue logic (such as programmable chip selects)
When the user requests a ShutDown from the operating system, the
environment is first cleared. Any request to turn off the PC Workstation,
from the control panel, or from the operating system, can only be granted if
the PC Workstation is not locked by Little Ben’s lock bit (otherwise the
power remains on, a red light is illuminated, and the buzzer is sounded).
Other ISA Accessory Devices
ISA accessory boards are for slow peripheral accessories. A diagram
showing the ISA slots that are available for the desktop and minitower
models is on page 27
.
Plug and Play All PCI accessory boards are Plug and Play, although not all ISA boards are.
Check the accessory board’s documentation if you are unsure.
In general, in a Plug and Play configuration, resources for an ISA board have
to be reserved first (using the Setup utility) and then you can plug in your
board.
The procedure for installing an ISA accessory board that is not Plug and
Play is described in the User’s Guide that is supplied with the PC
Workstation.
NOTE The Windows NT 4.0 operating system is not Plug and Play. Information
explained above is only applicable for Plug and Play operating systems (for
example, Windows 95).