The C programming language
Communications of the ACM
Microprogrammable Computer Architectures
Microprogrammable Computer Architectures
Register allocation for free: The C machine stack cache
ASPLOS I Proceedings of the first international symposium on Architectural support for programming languages and operating systems
Development tools for user microprogramming
MICRO 14 Proceedings of the 14th annual workshop on Microprogramming
Axiomatic proof rules for a machine-specific microprogramming language
ACM SIGMICRO Newsletter
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A user-microprogrammable computer has been developed for use as a building block in general-purpose and dedicated computer systems. The architecture is designed to be easily microprogrammed and features a 32-bit, vertically oriented microinstruction. The processor has a 135-nanosecond cycle time, either 16- or 20-bit macro data paths, and 1024 hardware registers. A significant fraction of the processor bandwidth may be budgeted for I/O processing to allow the substitution of microcode for expensive peripheral controllers. Furthermore, the micromachine is well suited to the emulation of other computer architectures in that it provides a large writable microcode memory and a minimum of special processor data paths. The design goals and strategies which determined the machine architecture are discussed, as well as an overview of the architecture and hardware organization. Finally, we report a number of specific applications developed to date.