A Multiprocessor Distributed Debugger

This thesis presents the design and implementation of a distributed debugger. The debugger was designed to support the debugging of a system containing multiple processors from a single debug console. The debugger implementation consists of host software which runs on a VAX minicomputer and target software which runs on Intel SDK-86 single board computers. The host and targets communicate using an RS-232 channel. The debugger supports breakpoints, disassembly of target code, symbolic reference of program procedures and variables, and download of Intel Object Module Format binary files

Data systems elements technology assessment and system specifications, issue no. 2

The ability to satisfy the objectives of future NASA Office of Applications programs is dependent on technology advances in a number of areas of data systems. The hardware and software technology of end-to-end systems (data processing elements through ground processing, dissemination, and presentation) are examined in terms of state of the art, trends, and projected developments in the 1980 to 1985 timeframe. Capability is considered in terms of elements that are either commercially available or that can be implemented from commercially available components with minimal development