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System Specific (ISA) Issues
So far, we have only described issues relating to our choice of microprocessor. But this specification is incomplete unless the issues relating to the bus and the system surrounding the microprocessor are examined. We recognized that the 386 already operates on a plethora of different buses, including ISA, EISA, MCA, VME, and MULTIBUS, and that these issues vary depending on which bus is used. We may even need to support more than one bus at a time, or even a custom bus. As such, we decided that 386BSD must take into consideration the support requirements of many different bus standards.
Copyrightę1994 Willaim & Lynne Jolitz