Alteration and implementation of the CP/M-86 operating system for a multi-user environment
Almquist, Thomas V.
Stevens, David S.
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CP/M-ee is a single user rriicrocomputer operating system developed by Digital Research. This thesis provides a multi-user "protected" CP/M-86 based disic sharing environment consisting of four Intel iSBC a6/12A single board computers, a MBB-60 bubble memory, and the REr^EX Data *arehouse 3223 memory storage unit. The REMEX houses a 14: incn Winchester hard diszc and two flexible floppy disic drives providing in excess of 23 megabytes of data storage capacity. The major objective in the design of this system was to create a table-driven CP/M-66 Basic Input/Output System that could be quickly and easily reconfigured to adapt to any new hardware configuration. Once the system was operational, the ESM3X hard distc could then serve as a "signal processor" emulation for tne AEGIS system. 3y maKing direct calls to the appropriate read/write routines, stored "radar data" could be retrieved from the hard disi for use by the other system processes.
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