Communications of the ACM
Operating system enhancement through firmware
MICRO 10 Proceedings of the 10th annual workshop on Microprogramming
Vertical Migration of Software Functions and Algorithms Using Enhanced Microsequencing
IEEE Transactions on Computers
An algorithm for selection of migration candidates
MICRO 17 Proceedings of the 17th annual workshop on Microprogramming
Migration implementation by integrating microprogramming and HLL programming
MICRO 17 Proceedings of the 17th annual workshop on Microprogramming
An automatic migration scheme based on modular microcode and structured firmware sequencing
MICRO 17 Proceedings of the 17th annual workshop on Microprogramming
The implementation of the attributed recursive descent architecture in VAX-11/780 microcode
MICRO 17 Proceedings of the 17th annual workshop on Microprogramming
Toward type-oriented dynamic vertical migration
ACM SIGMICRO Newsletter
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From a methodological point of view vertical migration involves the following four steps: identification of migration objects, prediction of expected system improvements, implementation, and verification of the results. In this paper a firmware monitor is presented as a support tool for the first and fourth step. The application environment for this monitor is a PDP-11/60 with writable control store running the UNIX operating system. Based upon a UNIX system model the requirements for the monitor are defined in terms of objects and their parameters to be measured. Afterwards the hierarchical structure and the components of the firmware monitor are presented. Furthermore the monitor handling and its influence on the operating system are discussed.