17. Optional IDE Interface
ÛZIATECH
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STAR SYSTEM APPLICATIONS
Certain STAR SYSTEM applications require a CPU board to have exclusive access to
an IDE drive, such as when a CPU is booting a unique operating system, or when, for
performance reasons, a CPU requires isolated (non-shareable) hard disk capability. All
of these needs are met by using an onboard IDE interface, although actual hard drive
performance is no better than that provided by peripheral hard drive controller boards
like the ZT 8952 or ZT 8953.
Overall system performance, however, is superior when using an onboard IDE interface
because without local IDE accesses impacting the STD 32 bus, other processors
experience lower latency times to system-wide resources. Additionally, the local
processor does not have to arbitrate for the STD 32 bus in order to perform local IDE
transfers.
SINGLE BOARD APPLICATIONS
When the ZT 8907 is used in single board applications with a local IDE hard disk,
Ziatech suggests that the application provide power to the ZT 8907 via a mating STD 32
connector. For mounting support, both the STD 32 connector and standoffs (to PCB
mounting holes located on the ZT 8907) should be used to physically support the
assembly. This will vary depending on the application. Contact Ziatech for assistance.