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FOXBORO FBM234 Channel isolation card

167Bug is command-driven; it performs its various operations in response to user commands entered at the keyboard. When you enter a command, 167Bug executes the command and the 167-Bug> prompt reappears. However, if you enter a command that causes execution of user target code (e.g., "GO"), then control may or may not return to 167Bug, depending on the outcome of the user program.

If you have used one or more of Motorola's other debugging packages, you will find the CISC 167Bug very similar. Some effort has also been made to make the interactive commands more consistent. For example, delimiters between commands and arguments may now be commas or spaces interchangeably

167Bug Implementation

MVME167Bug is written largely in the "C" programming language, providing benefits of portability and maintainability. Where necessary, assembler has been used in the form of separately compiled modules containing only assembler code - no mixed language modules are used. Physically, 167Bug is contained in two of the four 44-pin PLCC/CLCC EPROMs, providing 512KB (128K longwords) of storage. Both EPROMs are necessary regardless of how much space is actually occupied by the firmware, because of the 32-bit longword-oriented MC68040 memory bus architecture. The executable code is checksummed at every power-on or reset firmware entry, and the result (which includes a pre-calculated checksum contained in the EPROMs), is tested for an expected zero. Thus, users are cautioned against modification of the EPROMs unless re-checksum precautions are taken.

Memory Requirements

The program portion of 167Bug is approximately 512KB of code, consisting of download, debugger, and diagnostic packages and contained entirely in EPROM. The EPROM sockets on the MVME167 are mapped starting at location $FF800000. 167Bug requires a minimum of 64KB of contiguous read/write memory to operate.

product application

Products are widely used in metallurgy, petroleum, glass, aluminum manufacturing, petrochemical industry, coal mine, papermaking, printing, textile printing and dyeing, mechanical, electronic manufacturing, automobile manufacturing, plastic machinery, electric power, water conservancy, water treatment/environmental protection, boiler heating, energy, power transmission and distribution and so on

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