Allen-Bradley 1747-OC Series, User Manual

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1747-UM001A-US-P - March 2000
Modifying BIOS Settings 3-9
External Cache This option specifies the caching algorithm used for L2 external cache memory. The
settings are:
Disabled
Neither L1 internal cache memory on the CPU or
L2 secondary cache memory is enabled.
WriteBack
(default) Use the write-back caching algorithm.
WriteThru
Use the write-through caching algorithm.
PCMCIA Configuration Set how an ATA memory device in a PCMCIA interface module behaves.
Default
Disabled
The BIOS allows access to an ATA memory device within a PCMCIA interface module
without the need for card and socket services to be running on the open controller. Set
PCMCIA Configuration to Secondary to enable this access. This sets the ATA memory
device as a secondary master. If you want the ATA device to be the primary master,
remove or disable the embedded FlashDrive and disable the onboard IDE.
Boot Channel Use this setting to tell the BIOS which drive to try to boot off of, the primary master or the
secondary master.
Default
Primary
You should only set the boot channel to secondary as a temporary solution, such as using
a PC Card in a PCMCIA interface module to load software onto an embedded FlashDrive.
Setting the boot channel to secondary is nonstandard. DOS will boot from a secondary
drive, but other operating systems, such as Windows NT, will not boot from a secondary
drive.
Advanced CMOS Setup
(default BIOS settings for the 1747-OCE)
This field: Description:
Allen-Bradley HMIs