The Emulation Aid SYstem is a virtual machine monitor for the Nanodata QM-1 microprogrammable computer. The system is designed to provide the user with an interactive interface for the development and subsequent use of emulations on the QM-1. EASY provides integrated support for: 1) interactive control of multiple, concurrently resident, virtual computers implemented via emulation, 2) input/output from emulations (virtual I/O) to the various real peripherals of the QM-1, and 3) diagnostic displays for debugging of both the emulations and the software running on the emulated computers. EASY is implemented at three distinct levels: the majority of the system software is programmed in a high-level language (SIMPL-Q); this (service) software, in turn, executes on an emulated intermediate language machine (also called EASY); the EASY machine executes as the highest priority task under a microprogrammed operating system kernel (called TASK). Via EASY the user currently has access to several previously developed emulations. EASY is the host system for ongoing emulator development at the Navy's Dahlgren Laboratory.
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EASY—an operating system for the QM-1
Flink II, Charles W.
Follow ACM SIGMICRO Newsletter
, Volume 8 (3)
Association for Computing Machinery – Sep 1, 1977
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