These sub-systems were emulated using a 1553 IBM AT interface card under DOS environment. The remote terminals consists of sensors, cockpit instruments and data loading and retrieval sub- systems. These sub-systems were emulated using powerful graphics co-processor cards and touch sensitive screens. The emulation consists of implementation of 1553 bus transitions as per the interface control document (ICD), functional emulation and powerful error injection facilities.

The following remote terminals were emulated

		MFK, Multi-Function Keypad
		FSP, Function Selection Panel
		SGU (HUD, LMFD and RMFD) Symbol Generator Unit
		EMS, Engine and Electrical Monitoring System
		DHMS, Digital Hydraulic Monitoring System
		DFMS, Digital Fuel Monitoring System
		ECS, Environment Control System
		RALT, Radio Altimeter
		VUHF, Very Ultra-High Frequency
		IFFG, Identify Friend or Foe air to ground
		CCU, Command Coding Unit ( Backup Bus Controller )

These remote terminals support extensive error injection and miscellaneous facilities to study the behavior of the embedded bus controller and operational flight software of main computer under abnormal conditions. The various facilities provided apart from the functional emulation of the remote terminals are

		Disabling and Enabling of Channels
		Display of System Related Data like Minor Frame and Time
		Disabling and Enabling of Status word bits
		Message History
		Edit and Display of identification data
		Continuous display RT status like channels and status word bits
		Edit and Display of power-on configuration
		Display and editing of mode and status words