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Construction of a M68HC11 Board for the Modular Computers
Robert Clark and Edward Schroeder
Advisor: Dr. D. R. Schertz

The modular computers in the EE department at Bradley were built in the late 70's. Designed around the 8080 microprocessor, they are no longer up to date. This project extends the usefulness of these computers by updating them with a 68HC11 microcontroller based board. We chose to do this in order to allow fellow students to develop software during the hardware building process, where presently this is not possible. The advantages of the modular computers over the Motorola supplied EVB boards are significant. First, the interrupts work on the modular computer whereas problems have been found while using the interrupts on the EVB boards with the Buffalo monitor. Second, I/0 devices ranging from A-D, D-A converters to even a video board are available on the modular computers. For this and other reasons, the updating of the modular computers will benefit future students.

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