scope:

This standard defines the instruction set architecture (ISA) for airborne computers. It does not define specific implementation details of a computer.

The purpose of this document is to establish a uniform instruction set architecture for airborne computers which shall be used in Air Force avionic weapon systems.

This standard is intended to be used to define only the ISA of airborne computers. System-unique requirements such as speed, weight, power, additional input/output commands, and environmental operating characteristics are defined in the computer specification for each computer. Application is not restricted to any particular avionic function or specific hardware implementation by this standard. Generally, the ISA is applicable to, and shall be used for, computers that perform such functions as moderate accuracy navigation, computed air release points, weapon delivery, air rendezvous, stores management, aircraft guidance, and aircraft management. This standard is not restricted to implementations of "stand-alone" computers such as a mission computer or a fire control computer. Application to the entire range of avionics functions is encouraged such as stability and control, display processing and control, thrust management, and electrical power control.

The expected benefits of this standard ISA are the use and re-use of available support software such as compilers and instruction level simulators. Other benefits may also be achieved such as: (a) reduction in total support software gained by the use of the standard ISA for two or more computers in a weapon system, and (b) software development independent of hardware development.