Chapter 5 Peripherals
© National Instruments Corporation
5 - 5
VXIpc-850 Series User Manual
3.
After you have answered all the questions, QuickIDE will copy
files to the
c:
drive and perform edits to files as needed . Backup
copies of any altered files will be created in case you want to undo
the installation. QuickIDE may modify
CONFIG.SYS
and/or
AUTOEXEC.BAT
. The original files will be renamed
CONFIG.000
, and so on.
Technical Information about the IDE Interface
In addition to the CMD part, two other devices provide IDE interfaces .
The Intel 82091AA Advanced Integrated Peripheral (AIP) provides
floppy, parallel, and serial support and has an IDE interface. The IDE
interface is disabl ed because the AIP is not a PCI- based part and
therefore provides a slower IDE interface than the CMD0640B. The
Intel 82092AA PPEC (described in the PCMCIA section) provides a
PCI-IDE interface; however, PCMCIA performance is restricted when
that interface is enabled. Disabling the IDE on the PPEC provides
maximum PCMCIA flexibility and performance.
The CMD0640B is configured so that the PCI base address registers are
enabled, setting the IDE port to Legacy Mode or Native Mode with
software. In Legacy M ode, the CMD0640B is compatible with standard
ISA IDE. The IDE registers are mapped to the standard ISA port
addresses and the IDE drive interrupt occurs at IRQ14. In PCI IDE
Native Mode, the CMD0640B task file registers may be mapped to
nonstandard port addresses and hard drive interrupts occur on a PCI
interrupt. On the VXIpc-850, the PCI interrupt used is INTD.
The following describes the other options selected in the IDE circuitry
on the VXIpc-850.
•
Chip ID Port Address Decoding is disabled
•
Device ID Port Address is 0x178
•
Device ID is 0x60 (the only option for a system with one
CMD0640B)
•
Drive Address Register is disabled
The above options should not affect most users and are provided for
informational purposes to those already familiar with the CMD0640B.
PCI configuration utilities in the BIOS (and in Windows 95) will detect
the CMD0640B and program the necessary values.