In-Circuit-Emulator Capability for Logic Cards With Non-Removable Microprocessor Modules
Original Publication Date: 1985-Mar-01
Included in the Prior Art Database: 2005-Feb-18
A technique is described whereby an ICE* (In-Circuit-Emulation) microprocessor is provided in the final product package, so as to enhance analysis of field and manufacturing problems. Normally, an ICE microprocessor is used during the engineering and prototype development phase of a system, by utilizing the single-stepping features and by having the ability to display and modify status register, memory and data-bus contents. After the system is designed, the ICE support is removed from the circuit. However, it has been found that the ICE is useful as a device for analyzing microcode problems and manufacturing defects, such as broken lands on printed circuit boards.