Grass Valley Profile XP Service Manual - Manual (Page 161)

Applications subsystem (Windows NT system)
23 July 2004 Profile XP Service Manual 161
Applications subsystem (Windows NT system)
The applications subsystem executes and controls the standard user interface (GUI),
system control I/O, system configuration, and the various applications that control the
system from a functional level. The application subsystem consists of the applications
processor, the user input and display devices, various applications system disk storage
devices, and an 8-channel RS-422 interface.
Applications processor
The applications processor executes the application and system configuration
software, and consists of a plug-in Windows NT computer subsystem in a standard
NLX form factor. It is a complete PC system in and of itself. The applications
processor communicates with the Real Time Processor (RTP) using Inter-processor
Messaging (IPM), a shared memory-based communications channel, which gives the
applications processor the ability to interrupt, and to accept interrupts from, the RTP.
Windows NT I/O devices
These include a standard SVGA display, keyboard, and mouse.
Ethernet Interface
The Applications Processor board includes a built-in 10/100BaseT Ethernet interface
for network communications.
Applications system disk storage
The applications system storage devices include:
• a standard system IDE hard drive with provision for a second IDE hard drive that
mirrors the primary through an optional RAID-1 drive-mirroring controller
• an IDE CD-ROM drive
• a floppy-disk drive or a high-capacity super-drive
All of these drives are connected to the NLX board through IDE connectors and
passive circuits on the system motherboard.
RS-422 interface
The RS-422 interface is the serial control interface used by most of the common
external automation and control devices. This interface is implemented by means of
various protocols over an RS-422 physical interface. The applications processor
controls and communicates with the RS-422 Interface over the PCI bus.