1. Introduction
ÛZIATECH
16
Speaker Interface
The ZT 8907 supports an external speaker through a 2-pin frontplane connector (J8).
AC Power-Fail Protection
With the addition of an AC transformer, the ZT 8907 monitors AC power to permit an
orderly shutdown during a power failure. When AC power falls below an acceptable
operating range, a non-maskable interrupt is generated to notify the CPU of an
impending power failure. When the application software receives this notification, it
saves critical data before the CPU is reset.
Connection to the low voltage AC (24 V nom.) is provided through a 2-pin frontplane
connector (J10). See Chapter 15, "
," for more information.
Optional Hard Disk Interface
The ZT 8907 supports an optional local IDE hard disk interface. The interface does not
depend on the STD bus, permitting the ZT 8907 to boot from a localized operating
system. This feature is especially useful in multiprocessing applications that require
more than one operating system. See Chapter 17, "
," for more
information.
Optional Floppy Disk Interface
An optional floppy disk interface is also available on the front of the board. This is
designed for higher volume applications requiring a single board solution without a card
cage. For all other applications, a ZT 8954 Low Profile Floppy Disk Controller provides a
more modular solution. See Chapter 18, "
Optional Local Floppy Disk Interface
," for
more information.